Avalon VT-747SP Stereo Compresser

Vacuum-tube warmth and presence with solid-state flexibility.

VT-747SP Stereo Compresser description:

The Avalon VT-747SP Stereo Compresser. Vacuum-tube warmth and presence with solid-state flexibility.

The Avalon VT-747SP combines a stereo tube-discrete Class A opto-compressor with musical 6-band program EQ, L-R output level and gain reduction metering, and internal regulated power supplies in 2 rackspaces. Choose between tube tone and the classic Class A discrete transistor sound. Ideal for high-performance DAW input signal conditioning, stereo bus compression-EQ, stereo keyboards, and analog mastering applications.

The main features of the Avalon VT-747SP include:

Stereo Class A 6-band discrete passive program EQ
TSP twin signal path, vacuum tube bypass
Low noise -92dB
Fully balanced Class A input and DC coupled outputs
Stereo dynamic 60dB high resolution output meters
High-quality analog VU meter for gain reduction
High headroom +36dB input before overload
Spectral side-chain monitor for pre listen
EQ pre-post selection for opto-compressor
Sealed silver relays for all signal routing
Internal discrete regulated power supplies
Military spec vacuum tubes for long life and low noise

The main specifications of the Avalon VT-747SP include:

Circuit topology: 3 dual triode vacuum tubes (Sovtek 6922), high-voltage discrete Class A mode
Input gain range: Balanced, Class A, 20kOhms, -20dB to +16dB with high gain switch
Maximum input level: +36dB balanced XLR pin 2 hot
Maximum output level: +30dB balanced 600 ohms, DC coupled, discrete Class A
Output type: XLR connector, output trim gain -45dB to +6dB
Noise: 20kHz unweighted -92dB
Distortion: THD, IMD: 0.5%
Frequency response: -3dB 1Hz-200kHz
Gain reduction meter: High quality, illuminated gain reduction meter 0dB to -20dB range
Output meter: Twin 20-segment LED VU meters with -27dB to +30dB range
Compressor type: Optical passive attenuator
Make-up gain: Variable 0dB to +10dB stereo tracking
Threshold - Ratio: Threshold variable -30dB to +20dB, ratio-compression variable 1:1 to 20:1
Attack - Release: Attack variable 2mS to 200mS, release variable 100mS to 5 seconds
Sidechain spectral contour: Variable threshold -15dB to +15dB, frequency 70Hz to 9kHz twin ranges
Equalizer type: Discrete Class A, passive design optimized for full range program material
Frequency bands (6): Variable amplitude LF +/-24dB 15Hz shelf response, MF1 +/-8dB 125Hz selected Q response, MF2 +/-4dB 500Hz selected Q response, MF3 +/-4dB 2kHz selected Q response, MF4 +/-10dB 5kHz shelf response, HF +/-20dB 32kHz shelf response
AC power: Internal toroidal 100V to 240V, 50-60Hz selectable, 70 watts maximum
Dimensions: 19 x 12 x 3-1/2 inches (482 x 305 x 89mm)
Weight: 22 lbs. (10kg)
Weight-packed: 26 lbs. (11.8kg)