SPL Crescendo

First Eight-Channel Microphone Preamplifier featuring 120V Technology
The Crescendo is the first microphone preamplifier which operates with an internal operating voltage of 120V. Making it absolutely unique, because with the 120V Technology it is nearly impossible to overdrive this preamplifier. The Crescendo excels with absolute signal fidelity and clarity. Rediscover your microphones, they have never been amplified like this.

SUPRA op-amp 
Thanks to the discrete buildup with our proprietary high-voltage amplifiers, the SPL SUPRA op-amps, and thus a possible internal operating voltage of +/- 60V (120V Technology), the Crescendo provides unprecedented technical performance data. 
Crescendo is capable to amplify even the fastest transients, the finest details and the complete frequency range, clean and almost without any distortion.

Use the Mic Gain 
for the setting of the pre-amplification. You can control a range from 18dB to 70dB. For high-level signals, which do not need to be amplified that much, you can use a PAD with -20dB. Thus the control range of the amplification is shifted to -2dB to 50dB.

In and Output Stages
The differential amplifiers in the input stage are built-up with transistor pairs, consolidated in in a special housing. A precise matching of the transistors as well as thermal coupling guarantee a high common mode rejection and extremely low THD values. The choice of transistors and electrical resistors has a massive impact on the sound. Within countless listening sessions, the perfect components for the Crescendo were chosen – It was well worth the effort!

Servo
The discrete op-amps of the output stage are able to drive long cable paths without any problems. The output stages operate as current amplification, which, with 6mA quiescent current, also provide mere Class A operation. We almost completely renounced to use coupling capacitors, to avoid their sonic disadvantages (diffuse, blurring, loss of dynamics ). However, to eliminate DC voltage, active servo circuits are used.