API Audio

Both the 3124V and the 3124MV are designed with the professional engineer in mind. Both units give four channels of the highest possible quality mic preamp. However, the 3124MV provides an additional audio mixer with a transformer balanced output, keeping the unit size and price reasonable. Both models are equally at home in the control room, studio, and recording truck or on stage. The 3124MV utilizes the same microphone preamp circuit that is used in all API consoles. It is equipped with the AP2516 input transformer and the proprietary output transformer found in all API mic pres and throughout the API product line. The unit offers Variable Output Level Control, switchable 3:1 output transformer selection, and an internal 48-volt phantom power supply, which is front panel switchable for each channel. Also provided is a front panel -20 dB pad switch that affects both the mic and line in. A 1/4" phone jack is available on the rear panel for each channel as an insert tip-send/ ring-return placed between the mic pre amp output and the mixer input. Like the 3124V, the 3124MV provides up to 65 dB of gain. The Hi-Z front panel input goes directly to the op-amp, allowing a low level input such as a guitar or bass to be amplified without a matching transformer or direct box. This Hi-Z input can accept input levels as high as +20 dBu, making it perfect for keyboards and other high level devices. The rear output is an XLR connector. Additionally, the 3124MV adds a stereo panner with a level control, and a post "fader" aux send. The stereo panners and the aux sends are bussed to master output controls and then to the rear panel jacks. A stereo AUX return is provided to return effects or cascade additional mixers for more inputs. The unique stereo aux return control acts to balance the left/right signal, yet staying stereo. It can also be used as a mono return.

Engineers searching for a full-featured monitor controller for their DAW-based studio will find much to love about the API MC531. Inspired by the center section of API's acclaimed analog consoles, the MC531 includes a 41-detent control room knob for effortless volume control, along with a generous compliment of I/O. Programmable subwoofer integration makes incorporating your sub a piece of cake. The feature-packed desktop monitor controller also includes dual headphone outputs and a built-in talkback mic. Beyond that, the MC531 is built using the exact same circuitry you'd find in a full-blown API console, yielding you low noise and crystal-clear sound. Whether you work in a large commercial space or an intimate project studio, the API MC531 provides computer-based workflows with large console-style monitor control.

The SR22 Dual Channel Compressor features two channels of API's patented award-winning compressor circuit in a rackmount unit with internal power supply. This same compressor circuit was originally designed into the legendary ATI Paragon analog live mixing console. Each channel includes the patented THRUST® circuit, which protects the sensitive high frequency content of the audio signal, even under the most vigorous of compression ratios. The perfect companion to the new SR24 Dual Channel EQ, the SR22 provides comprehensive, easy-to-use control along with classic analog VU meters for monitoring output and gain reduction. The two channels can also be linked for use as a stereo compressor with true RMS power summing of the left and right signals.

The SR24 is a two channel, four band equalizer in a two rack-space chassis. With a dedicated knob and/or switch for each control function, the SR24 is easy to use; by utilizing continuously-variable controls for both the frequency and boost/cut, the SR24 can be very precise in applying equalization to the selected audio material. The SR24 circuit design is deeply rooted in API's history. From the late 1970's to the early 1980's, an audio company called "APSI" manufactured consoles and equalizers. Their 562 module was a 4-band, fully parametric equalizer which was designed by APSI and sold through API. Over the last several decades, these EQ modules remained a favorite among many studio engineers, but have become increasingly difficult to find. The SR24 is a faithfully re-engineered version of the original 562, offering the user 2 channels of classic analog EQ in one rackmount unit.

The API Select T12 is a classic 2-channel, all-tube, Class-A microphone preamplifier designed with API's proprietary AP2516 transformer in the input stage and a custom API transformer on the output stage. Built with 12AT7WC and 12BH7 dual-triode vacuum tubes, the T12 represents a new and exciting variation in API's preamplifier technology and provides the user with unique tonal options. The T12 can handle a wide range of production applications including stereo operation. Carefully engineered to deliver classic tube performance and sound, the T12 delivers API's famous warmth, punch and clarity in an all-new way and features our industry-exclusive Five Year Warranty.

The API Select T25 is a classic 2-channel, FET feedback-style compressor/limiter with a Class-A tube output stage that utilizes a custom API transformer. Built with 12AT7WC and 12BH7 dual-triode vacuum tube, the T25 represents a new direction in API's line of compressors. It offers the user a powerful and flexible feature set, including the ability for use in either dual mono or stereo mode, and is carefully engineered to deliver classic tube performance. The T25 excels at delivering the unmistakable sound of API and features our industry-exclusive Five Year Warranty.

Features API's Classic 312 Microphone Preamp in a 500 Series module Vintage Style Analog VU Meter Maximum 69dB of gain Traditional API fully discrete circuit design with 2520 Op Amp Proprietary AP2516 Input Transformer 20 dB pad switch 3:1 Output Transformer Tap Selection Switchable 48V phantom power Peak LED API's Five Year Warranty The 312 is one of API's most sought after and famous mic preamps. First introduced in the 1970s, it is well known and respected throughout the recording industry, and is the building block of the modern 3124 rack unit. Based on API co-founder Saul Walker's original designs, the API 312 Mic Pre combines our 2520 op-amps and proprietary transformers. It delivers the analog warmth, massive headroom and unmistakable sound for which API is known, in a convenient 500 Series format. Following the success of the hand wired 312 50th Anniversary Edition, this standard production version offers the classic API sound at an affordable price. Like all API products, the 312 is backed by API's unique Five Year Warranty.

Classic API Compression for the Modern Studio The API 2500+ Stereo Bus Compressor joins the company’s regular lineup, bringing all that formidable dynamics-shaping power to your rack in a sleek, space-saving 1U chassis. The API 2500+ model added a sophisticated Mix/Blend circuit to API’s venerable design coming form the anniversary edition. API’s flagship compressor delivers the inimitable sound of iconic API compression along with unparalleled parametric control. The result is an incredible-sounding, versatile, world-class stereo bus compressor capable of handling any audio production task. Meticulously designed to deliver a broad range of compression options and features not found on most compressors, the API 2500+ delivers warmth, clarity, and punch, whether used for nuanced dynamics control, brick-wall limiting, or anything in between. Parallel compression done right The Mix/Blend circuit found on the API 2500+ does a lot more than the simple wet/dry blend pot found on many modern compressors, giving you the option of either crossfading or parallel mixing of the compressed and uncompressed signals. First of all, the circuit can be hardwire relay bypassed entirely to deliver a purer signal than a standard blend pot simply maxed out to fully “wet” — a feature golden-eared engineers will appreciate. Next, when engaged and set to X (Cross), the Mix control lets you crossfade between fully uncompressed and fully compressed, literally increasing one while decreasing the other. In || (Parallel) mode, the MIX control effectively dials in your desired amount of compressed signal to blend in with the uncompressed signal, which remains constant. In case you’re wondering; trust us — these two active modes do sound and behave differently and you’ll quickly find uses for each. Equip Your Studio with Iconic API Compression If you’re after versatile compression, the API wrote the book. While the 2500+ is set up for stereo compression, you can also use it dual-mono. However you use it, though, you’ll have a range of compression styles to dial in — all highly musical, all incredibly usable. The 2500+ sports API’s patented Thrust circuit, a proprietary loudness contour that packs a powerful punch, imbuing each octave with the same energy (instead of half the energy as the next lowest one, as is the normal state of affairs).The Old/New Tone Type switch lets you choose between classic feedback and modern feed-forward compression styles. Whether you’re using it for drum stems, guitars, bass, vocals, or as a stereo bus compressor to pump up your mixes, the 2500+ delivers the iconic API analog sound and "slam factor" that has been relied on by recording engineers and heard on countless hits for a half century. Simply put: every serious studio needs the API 2500+. Incredibly versatile, highly musical When you choose API, you know you’re getting legendary sonic character. And with the API 2500+, you’ve got a range of character to choose from. To start, the 2500+ is equipped with API’s patented Thrust circuit before its RMS detector, which delivers punchy, old-school low end. There are also two types of compression onboard the API 2500+ — Old and New. The Old style uses the feedback type of compression in which the detector is placed after the VCA (as found on the classic API 525), while the New style uses a feed-forward type for a faster response typical of many popular modern compressors.The API 2500+ is stereo-ready, but sports a variable link between the left and right channels, so you can independently put the channels to work on your mono sources. Whatever way you use it, you’ll appreciate having API’s auto-makeup gain button on the output stage. It lets you vary the API 2500+’s threshold or ratio, while automatically maintaining a consistent output level. Sidechain input for creative ducking Every dynamics processor has a sidechain circuit that examines the signal and determines how much the VCA will reduce gain — but not every unit provides access to its sidechain. In compressors without a separate sidechain input, your main input signal is, essentially, compressing itself. With compressors that have a separate sidechain input — like the API 2500+ — you can introduce a different signal that determines the compression action on the main signal.An overt illustration of sidechaining is the “pumping” effect that’s popular in EDM production. A control signal — let’s say, a bass drum — is plugged into the sidechain input, triggering the detector and causing the main signal — a synth bass, in this example — to "duck," under each bass drum hit. This clears the way for maximum kick drum impact. Another classic use is for auto-ducking music under a voiceover, as in a radio commercial spot. Sidechaining can be used creatively in many ways, limited only by your imagination! API — the legendary American pro audio company No American pro audio company is more iconic than API. Launched in 1968 by Saul Walker, Automated Processes Inc. began building quality consoles for broadcast applications. Soon, the company’s products found favor with recording studios, and a string of industry-leading innovations (including the 500 Series module, the first VCA, computerized console automation, and more) followed. API produced the 2520 amplifier, one of the most famous op-amps in the recording industry, and their consoles and products found homes in such iconic studio facilities as the Hit Factory, Record Plant, Ocean Way, Sunset Sound, and many others.In fact, there are over 700 vintage API consoles around the globe — many of which are still in use. And the company certainly isn’t resting on its laurels; today’s API products give you the same unbeatable combination of utility, innovation, and great sound. That’s why, at Sweetwater, the name API commands reverence. API 2500+ Stereo Bus Compressor Features: * New Mix/Blend circuit with crossfade or parallel compression* Selectable ratio, attack, and release times* Expanded variable threshold between -20dBu to +20dBu* Selectable NEW or OLD switch for feed-forward or feed-back operation* Over Threshold LED illuminates when input audio crosses the set threshold* Patented Thrust filter with 3 settings for frequency-dependent sidechain control * 3 selectable compressor curve Knee settings: Soft, Medium, or Hard* Choice of Old (feedback) or New (feed-forward) compression* Preset or variable release time control* Variable Left/Right channel linking

Following the introduction of the 1608 in 2008, API delivered over 600 consoles and expanders to discerning audio professionals throughout the world. New for 2018 and based on the incredible success of the original, API proudly announces the 1608-II. Equipped with an updated feature set and debuting API's new cross-platform Final TouchTM automation system, the 1608-II continues API's rich legacy of crafting the world's highest-quality analog recording consoles. Adding valuable features for today's Engineers, Producers and Musicians, the 1608-II provides the powerful reliability and the incredible API sound that has characterized API products for nearly 50 years. 1608-II Features: * 16, 32, or 48 Input Channel Frame sizes * Each channel equipped with Mic Pre and Equalizer * Accepts API 500 Series Equalizers * 8 Multitrack Buses * 8 Auxiliary Buses * 1 Stereo Bus * 4 Stereo Returns, 100mm faders (manual or automated) with Multitrack and Stereo Bus assign * Full Center Section Control * Surround 5.1 Center Section Monitoring * Classic Analog Metering * Global 0dB Fader Bypass * Comprehensive Rear Panel IO Connectivity The standard fit of a 1608-II Console is: 16 548B Inputs with Mic/Line and Direct Output12 550A Equalizers4 560 Equalizers8 Echo Returns1 Complete Center Facilities Section16 Manual Faders1 Stereo Fader Pricing and Options: 16 Channel Console $52,40016 Channel Expander $39,90016 Channel Console Plus 16 Channel Expander (32 Channels Total) $92,30016 Channel Console Plus Two 16 Channel Expanders (48 Channels Total) $132,200 Final TouchTM Motorized Fader Automation System Derived from API's Vision Automation System used extensively in the Vision, Legacy Plus and AXS consoles, API now offers optional Final Touch fader automation for the 1608-II console. Final Touch automation combines system reliability, user flexibility and operational simplicity and offers a host of features found only in the most expensive and sophisticated console automation systems typically costing many times more. Consoles can be factory-fitted with Final Touch automation prior to delivery, and existing 1608-II consoles can be retrofitted with Final Touch automation. Final Touch Automation Features: * Reliable, self-contained system requiring no external computer * Individual Switch Control on each fader * Global Control Panel in the console Center Section * Hi Resolution 7.5" Touch Screen Control * Files are easily saved to standard memory cards * Automated Mute and Insert switches on each channel * Unlimited Fader Groups with 2 dedicated Group Master Faders * Motorized Stereo Program Fader * 4 Motorized Stereo Returns * DAW Control with unity gain audio bypass * Unlimited Mix Restore points * Comprehensive Operations Manual Pricing and Options: Consoles With Final Touch Automation 16 Channel Console $63,30016 Channel Expander $45,30016 Channel Console Plus 16 Channel Expander (32 Channels Total) $108,60016 Channel Console Plus Two 16 Channel Expanders (48 Channels Total) $153,900

Building on API’s rich heritage of extremely high-quality recording consoles, THE BOX is a small-format recording/mixing console designed for professional project studios, home studios, and production facilities of all kinds.Optimized for the digital era, THE BOX handles all the functions needed for production not provided by most DAWs, including mic preamps, input signal processing, high-quality mix bus, cue sends with talkback, monitor control, and more, without the redundant capacities of larger consoles.Most importantly, THE BOX provides the legendary “all discrete” API sound in an efficient, cost-effective package.Features:Two (2) input channels with mic/instrument/line preamp, HP filter, & integral 550A EQTwo (2) input channels with mic/instrument/line preamp, HP filter, & 500 slotTwo (2) compressors assignable to input channels or program bus with stereo linkSixteen (16) summing channels (20 channels during mix)Stereo program bus with master fader, insert, and external inputOne (1) stereo and (2) mono auxiliary sends/busesStereo cue send/bus & headphone systemPFL, AFL, and solo-in-place solo modes with stereo solo busFull-featured monitor section that supports two stereo monitor systemsTalkback systemComprehensive rear panel connections with balanced inputs and outputsIntegrated power supply 

The API 512v is a mic / line / instrument preamp, world famous for its ability to provide a low noise (-129 EIN) and unusually good sounding front end for all types of audio applications. Sonically, it delivers the instantly recognizable API sound at an affordable price, and in the scalable API 500 Series format. Offering an impressive 65 dB of gain, the 512v includes front panel Variable Output control, switchable 3:1 output transformer selection, phantom power, switchable polarity, -20 dB pad, and Mic or Instrument/Line selector. The front panel Combo-style XLR and 1/4 inch connector combined with rear panel mic access allows for additional flexibility when installed into an API lunchbox®, API's 10 position 500V vertical rack, or into an API console.The API 512v remains faithful to the circuit designs of API's founder Saul Walker. Artfully combining those circuits with API's proprietary transformers and the incomparable 2520 op-amp, the 512v is a highly musical and rich-sounding analog mic pre, equally at home in commercial recording spaces as it is in smaller home studios. Fully featured and still hand assembled, the 512v exhibits the reliability, long life, and uniformity which are characteristic of all API products. SpecificationsMic Preamp with 65 dB of gainVariable Output Level Control3:1 Output Transformer Tap SelectionFront and Back Panel Mic Input AccessLine/Instrument Preamp with 45 dB of gainFront Panel Combo-style XLR + 1/4 inch Line/Instrument InputLED VU meter for Gain Level indication20 dB pad switch, applies to mic/line/instrument48v Phantom switchable powerTraditional API fully discrete circuit design with 2520 Op AmpFeatures API's unique Five Year Warranty

Take Your Whole 500 Series Rig on the Road!Pack up and go with eight of your favorite 500 Series modules in this API 8-slot lunchbox. The 8-slot lunchbox offers a consistent 250mA across all eight slots, providing full compatibility with API 500 Series and VPR-approved modules. Onboard, you'll find all of the things that made the 6-slot (500-6B) chassis such a hit, such as DB-25 D-Sub connectivity for easy I/O and simple cabling, Phantom Power for condenser mics, and a rubber carrying handle, which you can swap for an optional rackmount kit (which you can get here at Sweetwater) for permanent installation. And, as an added bonus, the 8-slot lunchbox even includes toggle switches that allow you to conveniently link channels.API 8-slot lunchbox 500 Series Chassis Features:A handy and highly portable 8-slot 500 Series rackAll 8 slots consistently deliver 250mA of powerFully compatible with API 500 Series and VPR-approved modulesDB-25 connectivity on rear panel keeps your I/O tidy and offers grab-and-go conveniencePhantom Power supplied for each slotToggle switches let you effortlessly link channelsRubber feet and carrying handle provide amazing portabilityRugged steel chassis makes this lunchbox truly road worthyOptional Rack Ears available for rack mounting

The Channel Strip is a complete input module with mic pre, dynamics processing, precision EQ and output level control. With extensive signal metering, multiple balanced insert points and an output mute switch, The Channel Strip contains the best features of a large console input channel in a single rack space. It's the perfect choice for anyone looking for that high-performance API console sound.The result of thoughtful engineering, The Channel Strip includes everything needed to record an audio signal. It all starts with the famed 512c Mic Preamplifier, which includes the benefit of additional Mic, Line or Instrument input switching. Next is the 527 multi-mode Compressor with fully adjustable Threshold, Attack, Release, and Ratio controls on detented pots. The patented THRUST® circuit in the 527 gives your track the "in-your-face" punch that has made this circuit an award winner. Also included in The Channel Strip is probably the most recognized and revered API EQ of all time, the 550A three-band Equalizer with its switchable frequencies and 12dB of boost or cut. The 550A's High and Low frequency bands can be individually switched to be shelving EQs, and the "B.P. Filter" switch inserts a 50Hz to 15KHz bandpass filter.At the output of the unit is the 325 Line Driver, taken directly from API console designs with an output level pot and 10 segment meter. The meter can also be switched to show the output level of the preamp. Each of The Channel Strip's processing pieces can be switched in or bypassed individually, while a flip switch internally routes the compressor after the EQ if desired. Additional features include a sidechain input and the famous API 2520/transformer combination.        FEATURESAPI 512c Mic PreamplifierAPI 550A EqualizerAPI 527 CompressorAPI 325 Line DriverComplete patching facilities on rear panelTwo ten segment LED VU displaysOutput clips at +30dBm

Discrete Compressor, Re-Issue. Originally released in the 70's, the API 525 is a "feedback" type compressor, such as the 1176 and 660, etc. An input (threshold) control and output (make-up gain) control are provided. An additional "Ceiling" fine tune function modifies threshold and make-up gain for precise changes in compression without changes in output. A compression/limit switch sets ratio at either 2:1 or 20:1. Attack time is as fast as 15u/s. Four auto release modes are offered via two switches, 0.1s, 0.5s, 1.5s, & 2.0s. A De-Ess function inserts an inverse vocal energy curve filter in the detector for effective sibilance/p-pop reduction. The 525 is an identical re-issue of one of the most popular API products ever.The API 525 is perhaps the most successful solid state feedback compressor in history. It delivers dynamics control behavior unlike VCA "feed forward" compressors so common today. A remarkable multi-function "ceiling" control can increase gain reduction (lower threshold) while simultaneously raising output level to match, so the user can alter dynamics "on the fly" without level changes. This re-issue design has been taken from the original blue prints and spec control drawings from the API archives.        FEATURESAudio circuit uses the 2510 and 2520 Discrete Op Amps with transformer outputContinuously variable detented Threshold controlContinuously variable detented Attack and Release controlsContinuously variable detented Ratio controlOutput Fader level control10 segment VU/Gain Reduction meter with selector switchOverload LED"Link" switch for multiple unit interdependent compression linking"New"/"Old" switch for feed-forward or feed-back compression"Hard"/"Soft" compression curve knee switchPatented "Thrust" switch for frequency dependent side chain control"IN" switch with hard relay bypass when in the "Out" position

10 slot Rack with Power Supply. The API Model 500VPR is powered externally by a tri-polar power supply and is designed to accept API standard format 5.25" X 1.5" modules. The 500VPR is internally wired for PIN 2 hot, and comes with the API L200PS. The input/output jacks are both XLRs. The 500VPR can hold up to ten API modules. API makes several modules to fit this rack, including the 550A, 550B, 560, 525, and 512C. Like all API products, the 500VPR rack enjoys API's standard 5 year warranty.

The lineage of the 5500 circuit can be traced back to the original 550 equalizer designed by Saul Walker, the founder of Automated Processes Inc. The 550 was designed as a console equalizer which, due to the architecture of the recording console, uses an unbalanced input. Because the ergonomics of a console dictate that the controls take up little space, sometimes the number of included functions can be limited. The 5500 is specifically designed to address these limitations. It has a balanced input, a true straight-wire bypass, an integrated power supply with noiseless muting, and a range control that expands it versatility to mastering applications. Like all API products, the 5500 contains no integrated circuits in its signal path. The gain comes from two hand-built 2520 operational amplifiers in each channel. The balanced input is handled by a 2510 discrete operational amplifier, which is similar to the 2520, but without the high current output stage. Besides being a key component of the API sound, the 2520 coupled with the API 2503 output transformer is capable of delivering +30dBm before clipping. With this much headroom, it is unlikely that the 5500 can be driven to distortion unless perhaps another API unit is driving the input!      FEATUREClassic 550B Equalizer Design2 Range Switches Individually Alter Gain StepsUseable as a 550B, 550D or 550MPeak/Shelf Switch on HI & Lo bandsTrue Hardwire BypassBalanced IN and OUT on XLRUnbalanced Input on 1/4"EQ In/Out Switch

The API Model 500-6B Lunchbox is a six position rack designed to accept all API standard 5.25" X 1.5" modules. This allows an engineer the flexibility to bring along specialized EQ effects to any situation: 550A, 550B or 560. The Lunchbox is self-powered, with a rear panel selected AC voltage switch, and a removable power cord. The input/output jacks are XLR. The Lunchbox comes standard with a +48 volt internal phantom power supply, bussed to pin 15 for interface with the API 512C. API makes several modules for the 500-6B, such as the 512C mic preamp, the 525 compressor, the 560 Graphic EQ, and the 550B four band EQ. Combinations of these modules make perfect stereo recording packages (two 512C's and two 550B's) or vocalist's box, (one 512C, two EQ's and one 525 compressor).         FeaturesHolds 6 API standard modules48 Volt internal phantom power supplySelf-Powered, 100 to 250 Volts, 47 to 63 Hz, SwitchableRubber feet & carrying handle for portabilityRugged steel chassisPerfect for remote recording of Vocalist and InstrumentsOther uses for the versatile Lunchbox include:Multitrack Recording of Acoustic and Electronic Audio Sources.Sound Reinforcement Systems and Recording Live to Multitrack formats.Multiple facility projects where portability is a plus.Broadcast and Audio for Video Production.Custom Channel Input Strips.

Γραφικό EQ, αρχικά δημιουργήθηκε για χρήση στις API κονσόλες της δεκαετίας του '60 και του '70, η επανέκδοση του API 560 είναι μια μοναδική συσκευή με σκοπό να πραγματοποιήσει καθήκοντα που κανένα άλλο EQ δεν μπορεί.Παράγει τον μοναδικό API  ήχο, εύκολο φιλτράρισμα, και high headroom σε μια μικρή συσκευασία. Εξαιρετικά γρήγορο ρύθμισμα και ξερύθμισμα χρησιμοποιώντας ακριβείς zero detents και δεν υπάρχει όμοιο του 560 που να έχει την ίδια δυνατότητα διαμόρφωσης καμπύλης. Αυτή η "νέα-παλαιά" επανέκδοση του 560 έχει βελτιωμένη ανάλυση στην κρίσιμη περιοχή των ±4 db.Ενσωματώνει την αποκλειστική διάταξη κυκλωμάτων και τα εξαρτήματα του API (όπως του θρυλικού API 2520 op-amp), η επανέκδοση του 560 συνδυάζει επιδέξια το παρελθόν με το παρόν και είναι λειτουργικά σχεδιασμένο.Χαρακτηριστικά:10 bands of API proprietary equalizationFamiliar graphics operation on one octave centers12 dB of boost/cut per band"Proportional Q" narrows filter Q at extremesAdditional resolution within the ±4 regionCenter detent for reliable resetTraditional API fully discrete circuit designSilent bypass buttonRe-issue of the 1969 API 560 EQ

The API 512C is a mic/line/instrument preamp designed to provide a low noise, unusually good sounding front end for all types of audio systems. Sonically, it is at the top of the "Mic Preamp List", regardless of price. Offering low noise (-129 EIN) and 65 dB of gain, the 512C includes phantom power, switchable polarity, -20 dB pad and Mic/Line or Instrument selector.  Front panel XLR and 1/4 inch connectors combined with rear panel mic access allows for additional flexibility when installed in an API LunchBox, Six Pack, 10 position vertical rack, a 2 position horizontal rack, or an API console. What makes the API 512C unique is its long evolution from the original 1967 era 512, the first modular mic pre, to the current full featured 512C, while preserving the original sound character that made it so much a part of the early days of recording. Offering high headroom and a wide variety of inputs and input access ponts, it is ideal for unusual and demanding applications.        FEATURESMic Preamp with 65 dB of gainFront and Back Panel Mic Input AccessLine/Instrument Preamp with 50 dB of gainFront and Back Panel Line/Instrument InputLED VU meter for monitoring output level20 dB pad switch, applies to mic/line/instrument48v Phantom switchable powerTraditional API fully discrete circuit designUses the famous API 2520 Op-Amp

The A2D represents a landmark achievement for API; it is the first product ever produced by the company with an integrated digital output. Recognizing the desire for a high quality solution to raise microphone signals to a workable line level, we engineered one of our most popular mic preamp designs into an enclosure with our new proprietary analog to digital conversion. The result is a complete package - a pair of superb mic preamps feeding an A/D section with a set of standard digital interface outputs, multiple sample-rate choices, and internal or external clock options. Precise control of both the analog gain as well as the level feeding the digital section means that the mic signal can be maintained super-clean if desired, or driven harder on the analog side for that whallop and impact that can only be achieved by driving the transformer into saturation for that historic API sound! The A2D analog section consists of the circuitry contained in two API 312 mic preamps, or one half of the popular 3124 quad mic preamp rack product. A level control pot with an expanded 20-segment metering system shows precise mic gain levels. Control switches include polarity, 48v phantom power, input pad, 2:1 transformer routing, and Mic/Line select. Each analog input contains a balanced low-level XLR connector and a high-level line input on a 1/4 inch jack.      FEATURES A pair of signature 312 mic preamps API 2520 op amps 20 Segment LED metering on both Analog and Digital sections Mic and Line inputs Polarity, Phantom power, Input pad, 2:1, and Mic/Line switches 6 sample rate choices External Super Clock Input Multiple A2D units can be slaved together Insert point provided between Analog and Digital sections

Discrete Compressor, Re-Issue. Originally released in the 70's, the API 525 is a "feedback" type compressor, such as the 1176 and 660, etc. An input (threshold) control and output (make-up gain) control are provided. An additional "Ceiling" fine tune function modifies threshold and make-up gain for precise changes in compression without changes in output.  A compression/limit switch sets ratio at either 2:1 or 20:1. Attack time is as fast as 15u/s. Four auto release modes are offered via two switches, 0.1s, 0.5s, 1.5s, & 2.0s. A De-Ess function inserts an inverse vocal energy curve filter in the detector for effective sibilance/p-pop reduction. The 525 is an identical re-issue of one of the most popular API products ever. The API 525 is perhaps the most successful solid state feedback compressor in history. It delivers dynamics control behavior unlike VCA "feed forward" compressors so common today. A remarkable multi-function "ceiling" control can increase gain reduction (lower threshold) while simultaneously raising output level to match, so the user can alter dynamics "on the fly" without level changes. This re-issue design has been taken from the original blue prints and spec control drawings from the API archives.        FEATURESReissue of API's original 525 from the early 70'sPeak detecting "feedback" compressor/limiterVariable Threshold and Output levelsUnique "Ceiling" control combines key functionsVU meter for monitoring gain reduction4 Switchable release modesDe-Ess functionTraditional API fully discrete circuit designHardwire bypass

The TranZformer GT is a multifunction pedal that is designed to easily and affordably bring the world-famous analog sound of API to your guitar. Offering the user an unsurpassed level of sonic control, the TranZformer GT combines an API 525 feedback-type compressor with a guitar-optimized 3 band equalizer, both independently in/out switchable.The unit also features phase invert switches on each output, ground lift, clip indicator, transformer output and a hard wire bypass switch. Like all API products, the TranZformer GT is built to API's exacting standards and remains true to the design philosophy that has made API the leader in professional analog gear for nearly 50 years.Features:Traditional fully discrete API circuit designVariable Compressor with in/out switching3-Band +/- 15dB Equalizer with in/out switchingInput Gain control with +30dB of gainBalanced and Unbalanced Output Phase reverseBalanced Output Ground liftIncluded 18 volt external power supply optimizes performanceHard wire bypass switchUniversal +18VDC power supplyClip LED monitors Input and Output stage clippingFeatures Five Year Parts and Labor Warranty

The TranZformer LX is a multifunction pedal that is designed to easily and affordably bring the world-famous analog sound of API to your bass. Offering the user an unsurpassed level of sonic control, the TranZformer LX combines an API 525 feedback-type compressor with a bass-optimized 3 band equalizer, both independently in/out switchable.The unit also features phase invert switches on each output, ground lift, clip indicator, transformer output and a hard wire bypass switch. Like all API products, the TranZformer LX is built to API's exacting standards and remains true to the design philosophy that has made API the leader in professional analog gear for nearly 50 years.Features:Traditional fully discrete API circuit designVariable Compressor with in/out switching3-Band +/- 15dB Equalizer with in/out switchingInput Gain control with +30dB of gainBalanced and Unbalanced Output Phase reverseBalanced Output Ground liftIncluded 18 volt external power supply optimizes performanceHard wire bypass switchUniversal +18VDC power supplyClip LED monitors Input and Output stage clippingFeatures Five Year Parts and Labor Warranty

The API 550 EQ played a major part in the history of music recording in the USA during the 60's and 70's. Originally conceived for use in API's consoles, this latest 550 "B" version is a continuation of the original 1967 550 through the 550A with one additional filter band and several new frequencies. Incorporating API's exclusive circuitry and proprietary components (such as the legendary API 2520 op-amp), the 550B artfully blends the past with the present. So many hit records still depend on the unique 550 sound, that the 550B will be an invaluable tool you will turn to again and again. The API 550B—unlike any other you will ever use.Many EQ's today offer a huge assortment of complex features, but the API 550B provides exactly the right number of controls to the professional engineer. Deceptively simple at first glance, the 550B's four EQ bands are overlapped significantly to aid in dual roles as problem solver and sweetening device. Each band offers 7 switchable filter frequencies spanning 4 to 5 octaves, selected through experience by a "who's who" list of the industry's most proficient engineers. This re-issue design has been taken from the original blue prints and spec control drawings from the API archives.Features: 4 bands of our famous sounding equalizationEach band offers 7 API selected frequency centersReciprocal and repeatable filtering12 dB of boost/cut per bandEQ Band 1 and 4 offer shelf/peak switching"Proportional Q" narrows filter Q at extremesTraditional API fully discrete circuit designHigh headroom +30 dB clip levelRe-issue of 1967 API 550 EQ with an extra band

Few equalizers enjoy the respect and admiration of the coveted API 550A. Designed by the now legendary Saul Walker in the late 60's, the discrete 550A was first used as a modular OEM equalizer. As the industry rapidly embraced the sonic quality of the 550A, it quickly found it's way into many custom console designs by Frank DeMedio and other leading engineers. Many of these consoles are still in use today.Forty years later, the 550A remains the standard against which other EQ's are measured, and it has played a major role in the recording industry for decades. Still copied but never duplicated, the 550A became API's standard channel module EQ when the company began manufacturing consoles in 1971. With virtually all existing units spoken for, popular demand for this EQ resulted in API finally resuming production in 2004.With the long-awaited reissue of this unit, an EQ that has had such a part in the history of recording is continuing to make history in today's music.         FEATURES3 bands of classic API equalization Each band offers 5 API selected frequency centers Reciprocal and repeatable filtering maximum 12 dB of boost/cut per band EQ Band 1 and 3 offer shelf/peak switching "Proportional Q" narrows filter Q at extremes Traditional API fully discrete circuit design High headroom +30 dB clip level

Like the API 3124+, the 3124V is a high quality, compact, 4-channel mic preamp. It is equipped with the RE-115 K mic input transformer and the proprietary output transformer found in all API mic pres and throughout the API product line. Additionally, the 3124V offers Variable Output Level Control and switchable 3:1 output transformer selection. The unit has an internal 48-volt phantom power supply, which is switchable for each channel, as well as -20dB pad switches that affect both the mic and Hi-Z instrument inputs, both located on the front panel.The 3124V also features up to 65dB of gain. Additionally, the Hi-Z front panel inputs feed directly to the op amps, which allow a low level input such as a guitar or bass to be amplified without a matching transformer or direct box. These Hi-Z inputs can take levels as high as +20dBu, making them perfect for keyboards and other high level devices. The mic preamp outputs are on rear panel male XLR connectors.Features:Classic API Circuit DesignUses API 2520 Op AmpsVariable Output Level Control3:1 Output Transformer Tap SelectionFour female XLR mic inputsFour front panel 1/4" Hi Z instrument inputsFront panel polarity switchesFront panel -20dB pad switchesFront panel mic/instrument switchesFront panel 48V power switches