SPL Crescendo 8 Channel Microphone Preamplifier
The Crescendo offers 8-channels of flawlessly transparent microphone preamps boasting massive dynamic range, ultra low distortion, and the ability to capture even the finest details in recording, all in 3U of 19” rack space.
Features
- Flawless, transparent sound perfect for almost any source
- 120V operating technology ensures massive headroom
- High-voltage SUPRA op-amps
- Wide 18dB - 70dB gain range, or -2dB to 50dB with pad
- Discrete output stage for driving long cable paths without signal degradation
- Mu-metal shielded Toroidal transformer PSU
- Active servo circuits avoid the use of coupling capacitors
Technical innovation within the Crescendo is up to SPL’s usual high standard. Differential amplifiers are built with precisely matched transistor pairs and combined with thermal coupling to ensure an impressively low thermal distortion.
The discrete output stage op-amps also operate a 6mA dormant current ensuring the Crescendo meets the standard of Class-A operation.
Finally, a specially selected Toroidal transformer power supply is shielded with a custom-fabricated sheeting integrated into the Crescendo’s housing to avoid electrical interference and ensure no power noise bleeds into the range of the preamps.
Specifications
- Frequency Range: 20-50kHz, -3dB
- Preamp Gain: 70 dB
- Input Impedance: 10 kOhm
- Output Impedance: < 600 Ohm
- Noise: -69.7 dB @ 60dB Gain, -87.5 dB @ 30dB Gain (A-weighted)
- Fast Fourier Transformation: -96dBu @ 60dB Gain, -120dBu @ 20 dB Gain
- Rejection Ratio: > 65dBu/1kHz 60 dB Gain, > 75dBu/1kHz @ 30 dB Gain
- THD: 0.04% @ 60dB Gain, 0.008% @ 30dB Gain
- Equivalent Input Noise: 150 Ohm 129.5 dB @ 60dB Gain, 40 Ohm 134.4 dB @ 60dB Gain
- Dimensions: 482 x 132 x 300 mm, 9.5kg
