SPL Crescendo duo – Two-Channel Microphone Preamplifier
Description
Dual-Channel Microphone Preamplifier with 120V technology
Crescendo duo combines the precise sound that German Rundfunk-Technik is famous for with the innovative SPL 120V technology.The internal operating voltage of 120 volts allows Crescendo microphone preamplifiers to break completely new ground. This results in microphone preamps that sound detail-rich, vivid and equally honest.
Crescendo duo lets microphones shine in a whole new light – because they have never been amplified like this before.
The Undistortable
Thanks to the SPL 120V technology, it is almost impossible to overdrive this microphone preamplifier.
Crescendo duo is a dual-channel microphone preamplifier with 120V technology.Both channels feature the same range of functions. Besides phantom power (48 V) for condenser microphones, polarity reversal, a high-pass filter and a PAD switch, they provide the possibility to adjust the VU meter to display very high levels – so they leave nothing to be desired. The gain can be adjusted comfortably and precisely via a 12-step switch. With the switchable output control, the output level of the Crescendo duo can be perfectly adapted to following AD converters. Two outputs per channel allow the signal to be sent to two different devices in parallel. In addition to the extensive feature set and the outstanding technical characteristics, Crescendo duo convinces with a sonic authenticity that is second to none.
The Crescendo duo features a fully balanced signal flow. The input stage uses 10 pairs of matched PNP Transistors (Differential Input Transistors) for extremely low noise and a very high common mode rejection.
Both input stages have six 5th generation 120V SPL SUPRA Operation Amplifiers each.
The transformerless design of the input/output stages guarantees highly linear amplifying. The output stages operate as current amplifiers and therefore provide Class-A operation with more than 6mA quiescent current.
Key Features:
- Parallel Outputs Per Channel
- 120V Rails for High Headroom & Dynamics
- 48V, Polarity Switch, 20 dB Pad
- Input/Output Attenuators, Switchable HPF
- Balanced XLR Connections
- Included Power Cord