User manual AVALON DESIGN VT-747SP DATASHEET

[. . . ] AVA L O N PURE CLASS A DESIGN MUSIC RECORDING SYSTEMS COMPRESSOR-EQUALIZER CLASS A STEREO SIGNAL PATH The Avalon VT-747SP combines a creative STEREO tube-discrete Class A optocompressor with a musical six band program equalizer, L-R output level and gain reduction metering and internal regulated power supplies in a 2U space. [. . . ] The EQ can be placed pre or post of 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 placing, high-voltage dual triode tubes or discrete amplifiers in the primary output amplifiers. INPUT- OUTPUT- METERING Fully balanced DC coupled, Class A discrete amplifiers are utilized for the input and output drive interface with +36dB input headroom. Twin 60dB range LED meters provide fast L-R output status of all levels. V T- 7 4 7 S P STEREO CLASS A, VACUUM TUBE-DISCRETE TWIN SIGNAL PATH OPTO-COMPRESSOR-EQUALIZER V T- 7 4 7 S P FEATURES · 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 vacuum tubes for long life and low noise SPECTRAL-OPTO-COMPRESSION The opto-compressor features a minimum signal path design. 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, ratiocompression, attack and release controls. [. . . ] Tel: 949-492-2000 V T - 7 4 7 S P S P E C I F I C A T I O N S Circuit topology Input gain range Dual triode vacuum tubes, high-voltage discrete Class A Balanced, Class A, 20k ohms, -6dB to +16dB with high gain switch Maximum input level Maximum output level Output type Noise 20kHz unweighted Distortion THD, IMD Frequency response -3dB +36dB balanced XLR pin 2 hot +30dB balanced 600 ohms, DC coupled, discrete Class A XLR connector, output trim gain -45dB to +10dB -92dB 0. 5% 1 Hz to 200kHz Gain reduction meter Output meter High quality, illuminated gain reduction meter 0dB to -20dB range Twin 20 segment LED VU meters with -27dB to +30dB range Compressor type Make-up gain Threshold - Ratio Attack- Release Side-chain spectral contour Optical passive attenuator Variable 0dB to +10dB stereo tracking Threshold variable -30dB to +20dB, ratio-compression variable 1:1 to 20:1 Attack variable 2mS to 200mS, release variable 100mS to 5 seconds Variable threshold -15dB to +15dB, frequency 70Hz to 9kHz twin ranges Equalizer type Frequency bands (6) Discrete Class A, passive design optimized for full range program material Variable amplitude LF +/-16dB 10Hz shelf response Variable amplitude MF1 +/-6dB 100Hz selected Q response Variable amplitude MF2 +/-4dB 550Hz selected Q response Variable amplitude MF3 +/-4dB 2kHz selected Q response Variable amplitude MF4 +/-8dB 5kHz selected Q response Variable amplitude HF +/-16dB 32kHz shelf response AC power Dimensions Weight Dimensions-shipping carton Weight-packed Internal toroidal 100v to 240v, 50-60Hz selectable, 55 watts maximum 19x 12x3. 5 in (482x305x89mm) 221bs (10kg) 21 x 18 x 8 in (533 x 457 x 203mm) 261bs (11. 8kg) TSP TWIN SIGNAL PATH AVA L O N DESIGN Avalon reserves the right to incorporate changes in design and in the specifications of this product without prior notice. © 1999 AVALON INDUSTRIES, INC. [. . . ]