User manual AVALON DESIGN VT-737SP DATASHEET

[. . . ] AVA L O N PURE CLASS A DESIGN MUSIC RECORDING SYSTEMS DIRECT SIGNAL PATH The Avalon VT-737 SP features a combination of TUBE preamplifiers, opto-compressor, sweep equalizer, output level and VU metering in a 2U space. [. . . ] The EQ section can be flipped pre or post the opto-compressor via a front panel switch for alternate effects and tone shaping. Two VT-737 SP's can be linked via a rear panel link cable for stereo tracking. The compressor bypass is a sealed silver relay for the most direct signal path V T- 7 3 7 S P MONO CLASS A, VACUUM TUBE-DISCRETE PREAMP-OPTO-COMPRESSOR-EQUALIZER V T- 7 3 7 S P F E AT U R E S · Minimal signal path design · Four Class A vacuum tube triodes E QUA L I Z E R The VT-737 SP equalizer utilizes 100% discrete, Class A-high-voltage transistors for optimum sonic performance. The high and low frequency bands provide the smooth characteristics of an all passive design, while the dual mid bands include variable frequency and switched Q-width selection. The enhanced range of the mid bands is extended into the high and low bands by the use of X10 frequency multipliers. The bypass switch incorporates a sealed silver relay for the most direct signal path. When the EQ to sidechain is engaged, the high-low EQ remains in the audio path for tone enhancement. The output level control provides a variable control of the overall signal path. [. . . ] Tel: 949-492-2000 V T - 7 3 7 S P S P E C I F I C A T I O N S Circuit topology Gain range Four dual triode vacuum tubes, high-voltage discrete Class A Microphone: Transformer balanced 850 ohm, 0dB to +58dB Instrument: Unbalanced 1 meg ohm, 0dB to +30dB Line: Balanced Class A, 20k ohms, -27dB to +18dB Maximum input level and connector types Microphone +16dB @ 25Hz, +30dB @ 1kHz balanced XLR, pin2 hot Instrument +30dB unbalanced front panel jack socket Line +36dB balanced XLR, Pin 2 hot Maximum output level Output type and gain Noise 20kHz unweighted Noise microphone EIN Distortion THD, IMD Frequency response -/+0. 5dB Frequency response -3dB +30dB balanced 600 ohms, DC coupled, pure Class A XLR connector, output trim gain -45dB to +10dB -92dB -116dB, 22Hz to 22kHz unweighted 0. 5% 10Hz to 120kHz input filter included 1 Hz to 200kHz line in-out VU meter and gain reduction High cut filter 0VU = +4dB and gain reduction to -20dB Variable 6dB per octave 40Hz to 200Hz Compressor type Threshold - Ratio Attack - Release Equalizer type Frequency bands (4) Optical passive attenuator incorporating twin vacuum tubes and stereo link Threshold variable -30dB to +20dB, ratio-compression variable 1:1 to 20:1 Attack variable 2mS to 200mS, release variable 100mS to 5 seconds Discrete Class A, variable active and switched passive design Treble - switched 10kHz, 15kHz, 20kHz, 32kHz, +/- 20dB range, shelf High mid - variable 200Hz to 2k8Hz and 2kHz to 28kHz, +/- 16dB range, hi-lo Q Low mid - variable 30Hz to 450Hz and 300Hz to 4k5Hz, +/- 16dB range, hi-lo Q Bass - switched 15Hz, 30Hz, 60Hz, 150Hz, +/- 24dB range, shelf AC power Dimensions Weight Dimensions-shipping carton Weight-packed Internal toroidal 100v to 240v, 50-60Hz selectable, 75 watts maximum 19 x 12 x 3. 5 in (482 x 305 x 89mm) 22 1bs (10kg) 21 x 18 x 8 in (533 x 457 x 203mm) 261bs (11. 8kg) 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. [. . . ]