SPL Crescendo Duo V2 - Dual-Channel Microphone Preamplifier
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Description
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 create a detail-rich, vivid and equally honest sound image. 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.
48 V
The 48V switch activates the required phantom power of 48 volts for the use of condenser microphones.
VU-10
With this switch the level displayed in the VU meter can be adjusted by -10 dB. This is very handy to display high levels.
Polarity
Activating the polarity reversal switch turns the polarity of a microphone signal by 180°
HP
A high-pass filter with 6 dB per octave reduces subsonic noise below 120 Hz.
Mic Gain
The gain is adjusted by a 12-step switch. The pre-amplification ranges from +18 dB to +70 dB.
Output
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
By activating the PAD, the input sensitivity can be reduced by 20 dB. This allows the preamplifier to be ideally adapted to high level input signals. Tip: With PAD activated, Crescendo duo is also ideal for line-level input signals.
Built-in Output Splitter
Both microphone preamps have two parallel outputs each. An additional external signal splitter for back-up systems during a recording session is therefore no longer necessary.
Looks great, feels great – and lasts for a lifetime
The Crescendo duo v2 has a 4 mm thick, black anodized aluminum front panel and aluminum knobs milled from solid. The housing is made of high-quality steel and is powder-coated in elegant black.
| Analog input / output; XLR (balanced) | |
| Maximum input / output level | 32.5 dBu |
| Input impedance | 10 k? |
| Output impedance | 75 ? |
| Frequency range (-3dB) | 20 Hz Ð 100 kHz |
| THD + N (10 Hz Ð 22 kHz, 32 dB Gain) | 0.002 % |
| THD + N (10 Hz Ð 22 kHz, 63 dB Gain) | 0.001 % |
| Noise (A-weighted, 150 ?, 32 dB Gain) | - 94 dBu |
| Noise (A-weighted, 150 ?, 63 dB Gain) | - 67.5 dBu |
| E.I.N. (150 ?) | -130.5 dBu |
| Common mode rejection (1 kHz) | 88 dB |
| Internal Linear Power Supply with Shielded Toroidal Transformer | |
| Operating voltage for audio electronics | +/- 60 V |
| Operating voltage for relays and LEDs | + 12 V |
| Mains Power Supply | |
| Mains voltage (selectable, see fuse chamber) | 230 V AC / 50; 115 V AC / 60 Hz |
| Fuse for 230 V | T 1 A |
| Fuse for 115 V | T 2 A |
| Power consumption | max. 20 VA |
| Physical | |
| Dimensions W x H x D (width x height x depth) | 482 x 88 x 300 mm 19 x 3.46 x 11.8 inch |
| Unit weight | 6.1 kg 13.45 lbs |
| Shipping weight (incl. packaging) | 7.5 kg 16.54 lbs |
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 create a detail-rich, vivid and equally honest sound image. 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.
48 V
The 48V switch activates the required phantom power of 48 volts for the use of condenser microphones.
VU-10
With this switch the level displayed in the VU meter can be adjusted by -10 dB. This is very handy to display high levels.
Polarity
Activating the polarity reversal switch turns the polarity of a microphone signal by 180°
HP
A high-pass filter with 6 dB per octave reduces subsonic noise below 120 Hz.
Mic Gain
The gain is adjusted by a 12-step switch. The pre-amplification ranges from +18 dB to +70 dB.
Output
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
By activating the PAD, the input sensitivity can be reduced by 20 dB. This allows the preamplifier to be ideally adapted to high level input signals. Tip: With PAD activated, Crescendo duo is also ideal for line-level input signals.
Built-in Output Splitter
Both microphone preamps have two parallel outputs each. An additional external signal splitter for back-up systems during a recording session is therefore no longer necessary.
Looks great, feels great – and lasts for a lifetime
The Crescendo duo v2 has a 4 mm thick, black anodized aluminum front panel and aluminum knobs milled from solid. The housing is made of high-quality steel and is powder-coated in elegant black.
| Analog input / output; XLR (balanced) | |
| Maximum input / output level | 32.5 dBu |
| Input impedance | 10 k? |
| Output impedance | 75 ? |
| Frequency range (-3dB) | 20 Hz Ð 100 kHz |
| THD + N (10 Hz Ð 22 kHz, 32 dB Gain) | 0.002 % |
| THD + N (10 Hz Ð 22 kHz, 63 dB Gain) | 0.001 % |
| Noise (A-weighted, 150 ?, 32 dB Gain) | - 94 dBu |
| Noise (A-weighted, 150 ?, 63 dB Gain) | - 67.5 dBu |
| E.I.N. (150 ?) | -130.5 dBu |
| Common mode rejection (1 kHz) | 88 dB |
| Internal Linear Power Supply with Shielded Toroidal Transformer | |
| Operating voltage for audio electronics | +/- 60 V |
| Operating voltage for relays and LEDs | + 12 V |
| Mains Power Supply | |
| Mains voltage (selectable, see fuse chamber) | 230 V AC / 50; 115 V AC / 60 Hz |
| Fuse for 230 V | T 1 A |
| Fuse for 115 V | T 2 A |
| Power consumption | max. 20 VA |
| Physical | |
| Dimensions W x H x D (width x height x depth) | 482 x 88 x 300 mm 19 x 3.46 x 11.8 inch |
| Unit weight | 6.1 kg 13.45 lbs |
| Shipping weight (incl. packaging) | 7.5 kg 16.54 lbs |
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