SPL Crescendo

£0.00 £4,599.00 inc. VAT
£3,832.50 exc. VAT

Mic Preamp

The SPL Crescendo uses SPL’s 5th generation SUPRA op-amps to create a 120-volt power rail, resulting in more 10dB of additional headroom and 3dB less noise. It also makes it extremely difficult to overload the preamps.

Housed in a 3U rack, each of the mic preamps includes an analogue VU meter, -10dB calibration switch, +48V phantom power, polarity reversal switch and a -20dB input pad. A gain control is also included offering a range of 52dB. The preamp offers 18dB to 70dB of gain which is reduced to -2dB to 50dB with the -20dB pad switched on.

Differential amplifiers at the input stage are designed with transistor pairs which are consolidating in a dedicated housing. Transistors are precisely matched and thermally coupled to offer superior common mode rejection. Discrete op-amps are used at the output stage and are designed to drive long cable paths. Active Servo circuits have also been employed to eliminate DC voltage. Finally, the built-in toroidal transformer power supply is shielded using a special Mu-metal sheet to avoid any electrical interference.

On the back, are eight inputs and eight outputs over XLR as well as eight additional outputs via D-sub (DB25) for easy connectivity.

  • 120V 8-Channel microphone preamp
  • Unique 120V technology makes it almost impossible to overdrive
  • Absolute signal fidelity and clarity
  • Wide dynamic range provides a very clean sound with little to no distortion
  • SPL's proprietary SUPRA Op-Amp creates +/-60V
  • Individual gain control (Mic Gain) for each channel
  • Phase reversal switch
  • Phantom power
  • -20dB PAD switch
  • 18dB to 70dB pre-amplifier gain or to -2dB to 50dB control (-20dB pad engaged)

Frequency range
20-50kHz, -3dB
Mic pre amp gain
70 dB
Input impedance
10 kOhm
Output impedance
< 600 Ohm
Noise (A-weighted)
(60dB Gain) -69.7 dB (30dB Gain) -87.5 dB
(60dB Gain) -96dBu (20 dB Gain) -120dBu
(60 dB Gain) > 65dBu/1kHz (30 dB Gain) > 75dBu/1kHz
(60dB Gain) 0.04% (30dB Gain) 0.008% (10dB Gain) 0.00009%
(60dB Gain) 150 Ohm 129.5 dB (60dB Gain) 40 Ohm 134.4 dB

SPL Crecendo Manual