Avalon VT-747SP Pure Class A Vacuum Tube Stereo Spectral Opto-Compressor
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The Avalon VT-747sp is an ideal studio companion, especially if you are already equipped with quality microphone preamps. It is a stereo equalizer/compresser of the finest kind, and additionally provi... Click To Read More About This Product
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The Avalon VT-747sp is an ideal studio companion, especially if you are already equipped with quality microphone preamps. It is a stereo equalizer/compresser of the finest kind, and additionally provides L/R output level and gain reduction metering, as well as internally regulated power supplies. It is ideal for high performance DAW input signal conditioning, stereo buss compression-EQ, stereo keyboards and analog mastering applications.
Spectral-opto-compression The opto-compressor features a minimum signal path design utilizing sealed silver relays for all signal routing and by pass functions. The optical attenuator acts as a passive level controller with a Class A, variable gain make-up amplifier. Full dynamic control from soft compression to hard-knee limiting can be achieved with master threshold, ratio-compression, attack and release controls. Gain reduction indication is a large analog VU meter. Low frequency and high frequency contour parametric spectral controls can be routed into the side-chain path for enhanced frequency dependent compression with variable frequency and threshold levels. SC listen provides side-chain listen mode for monitoring.
Six band program equalizer The VT-747SP equalizer utilizes 100% discrete, Class A high-voltage transistors for optimum sonic performance. The six band STEREO program EQ incorporates the smooth characteristics of an all passive design. The frequency turnover, Q and amplitude ranges have been carefully chosen for each band to provide the most natural harmonic balance and lowest phase change while offering simple and effective tone control. The EQ can be placed pre or post the opto-compressor for enhanced effects.
TSP - twin signal path The VT-747SP features TSP which gives you the choice of either tube tone or the classic, Class A discrete transistor sound by exchanging, three (3) high-voltage dual triode tubes with discrete amplifiers in the opto-compressor and primary output stages.
Input-output and metering Fully balanced DC coupled, Class A discrete amplifiers are utilized for the input and output drive interface with+36dB input headroom. A high quality analog VU meter indicates accurate gain reduction. Twin 60dB range LED meters provide fast L-R output status of all levels.
Stereo Class A opto-compressor with spectral control
Stereo Class A six 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
Circuit topology: Three (3) dual triode vacuum tubes (Sovtek 6922), high-voltage discrete Class A mode. Input gain range: Balanced, Class A, 20k ohms, -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 to 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 Side-chain 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 Variable amplitude MF1 +/-8dB 125Hz selected Q response Variable amplitude MF2 +/-4dB 500Hz selected Q response Variable amplitude MF3 +/-4dB 2kHz selected Q response Variable amplitude MF4 +/-10dB 5kHz shelf response Variable amplitude HF +/-20dB 32kHz shelf response AC power: Internal toroidal 100v to 240v, 50-60Hz selectable, 70 watts maximum Dimensions: 19 x 12 x 3.5 in (482 x 305 x 89mm) Weight: 22lbs (10kg) Dimensions-shipping carton: 21 x 18 x 8 in (533 x 457 x 203mm) Weight-packed: 26lbs (11.8kg)
One year parts and labor warranty. 90 day warranty for tubes.
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