SPL Crescendo Duo 2-Channel Microphone Preamplifier

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SKU: # 742793
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CRESCENDO DUO

Your Price: $3,249.00 CDN

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2-channel Microphone Preamp with 120V Technology, +48V Phantom Power


With the Crescendo duo, SPL expands their 120V microphone preamp portfolio with a dual-channel version of the Crescendo.

Crescendo Duo is almost impossible to overdrive this microphone preamplifier. It shines with absolute signal fidelity and clarity and lets microphones appear in a whole new light because they have never been amplified like this before.

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.

Built-in Output Splitter
Both microphone preamps have dual outputs. The often needed splitter is therefore already built in. Record the microphone signal on a recording system and at the same time record it on a backup system.

Key Features

• The phantom power required for the use of condenser microphones is activated with the 48V switch.

• High gains can be used to optimally drive subsequent AD converters. Should the VU meter therefore deflect too far, you can reduce the displayed level by 10 dB.

• Turn the polarity of a microphone signal 180 degrees by activating the polarity reversal switch.

• A high-pass filter with 6 dB per octave reduces subsonic noise below 120 Hz.

• The mic gain is adjusted by a 12-step switch. The pre-amplification ranges from +18 dB to +70 dB.

• The switchable output control allows level adjustment to subsequent devices. The control range is +/- 10 dB. This results in a total gain of 80 dB.

• Pad - For loud input signals (including line signals) the input sensitivity can be reduced by 20 dB.

Specifications

Frequency range: 20-100kHz (32dB Gain) -3dB

Mic pre amp gain: 70dB (in 2 to 7 dB steps)

Output gain: +/- 10dB

Input impedance: 10 kOhm

Output impedance : < 600 Ohm

Noise (A-weighted):
(63dB Gain) -67.5dBu
(32dB Gain) -94 dBu
Noise FFT:
(63dB Gain) -97dBu
(32dB Gain) -125dBu

CMRR:
(63dB Gain) > 65dBu/1kHz
(32dB Gain) > 88dBu/1kHz

THD/N:
(63dB Gain) 0.001%
(32dB Gain) 0.002%
(18dB Gain) 0.0002%

E.I.N:
(63dB Gain) 150 Ohm -131.2dBu
(32dB Gain) 40 Ohm -126.4dBu

Power consumption:
230V: 17.7 W
115V: 20 W
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