SPL Crescendo Duo 2-Channel Microphone Preamplifier - Handbuch (Seite 3)

Crescendo duo – Manual Crescendo duo – Manual
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EN
DE
Mic Gain Switch
Output Gain
VU Meter
Mains Switch
15
9
10
14
VU -10dB
14 PAD
13
Polarity Inversal
High Pass
11
12
Phantom Power
8
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
Fuses
230V 315mA (Fast)
115V 630mA (Fast)
The phantom power required for condenser microphones can be activated with
the 48V switch.
If phantom power is on, the 48V LED lights up blue.
IMPORTANT: Use phantom power only for condenser microphones. For all other microphone types – especially
ribbon micorphones – switch off the phantom power!
Use the Mic Gain switch to adjust the preamplification gain in 2 to 7dB steps.
The Output Gain controls the output level from -10 to +10dB.
With the OUTPUT switch the signal can be completely switched off.
The polarity of a microphone signal can be inversed (180°) with the Polarity
Inversal switch.
The High Pass switch activates a high pass filter with 3dB per ocatve at 120 Hz.
If the input signal is too hot, switch on PAD. This reduces the level by 20dB.
You can make the VU Meters less sensitive by activating the VU -10dB switch.
Power down
Switch off mains on the back of the Crescendo duo (Off = O).
The VU Meter no longer light up.
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