SPL Crescendo 8
Eight-channel microphone preamplifier for studio recording, built on SPL's 120V internal operating voltage. Each channel has analog gain, phantom power, polarity reverse, a PAD switch and two parallel outputs, so it suits multitrack tracking into converters.
- 8 mic preamp channels with 120V technology (+/-60 V)
- Analog gain +18 dB to +70 dB
- 48 V phantom, polarity reverse, 20 dB PAD per channel
- Dual outputs per channel: XLR and DB25
- Max output level 32.5 dBu; 19-inch rack, 9.5 kg
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Crescendo 8 is a rack-mount preamp with eight identical channels. Each channel has an analog potentiometer for gain from +18 dB to +70 dB, 48 V phantom power with an LED indicator, a 180° polarity reversal switch and a 20 dB PAD. A VU-10 switch lowers the displayed VU meter level by 10 dB so that high levels can be read.
The audio stage runs from an internal +/-60 V supply using SPL's own 120V SUPRA operational amplifiers, which work in class A and largely avoid coupling capacitors. Input stages use matched transistor pairs. The maker quotes a maximum output level of 32.5 dBu, which is 12 dB more headroom than typical +/-15 V designs. With the PAD engaged the unit can also take line-level signals.
Every channel has two parallel outputs: a balanced XLR line output and a DB25 output. The DB25 connection suits multichannel AD converters and removes the need for an external splitter when a backup recording system is used. The unit has a black anodized aluminium front panel and a powder-coated steel housing, and is made in Germany. It has an internal linear power supply with a toroidal transformer and a selectable 115 V or 230 V mains setting.
Spécifications
- Marque
- SPL
- Modèle
- Crescendo 8
- Catégorie
- Studio › Préamplis et outboard
Inputs
- Mic preamp channels
- 8
- Input connector
- XLR (balanced)
- Input impedance
- 10 kΩ
- Gain range
- +18 dB to +70 dB
- PAD
- 20 dB
- Phantom power
- 48 V
Outputs
- Outputs per channel
- 2
- Output connectors
- XLR line output; DB25
- Maximum output level
- 32.5 dBu
- Output impedance
- 75 Ω
Audio
- Frequency range (30 dB gain)
- 20 Hz – 100 kHz
- THD + N (30 dB gain)
- 0.0089 %
- THD + N (70 dB gain)
- 0.30 %
- Noise, A-weighted, 150 Ω (30 dB gain)
- -90.8 dBu
- Noise, A-weighted, 150 Ω (70 dB gain)
- -57.8 dBu
- Equivalent input noise (150 Ω)
- -127.8 dBu
- CMRR (30 dB gain)
- >84 dB
Controls
- Per-channel switches
- 48 V, Ø polarity, PAD, VU-10
- Gain control
- Analog potentiometer
Power
- Audio electronics operating voltage
- +/- 60 V
- Relay and LED operating voltage
- + 12 V
- Mains voltage
- 230 V AC / 50 Hz; 115 V AC / 60 Hz (selectable)
- Fuse for 230 V
- T 1.6 A
- Fuse for 115 V
- T 3.15 A
- Power consumption
- 230 V: 60 W, 115 V: max. 60 W
Physical
- Dimensions (W x H x D)
- 482 x 132 x 300 mm (19 x 5.2 x 11.8 inch)
- Unit weight
- 9.5 kg (20.94 lbs)
- Shipping weight
- 12.25 kg (27.01 lbs)
- Front panel
- 4 mm black anodized aluminium
- Housing
- Powder-coated black steel