User manual AVALON DESIGN AD2077 DATASHEET

[. . . ] AVALON DESIGN PURE CLASS A AD2077 DUAL MONO, MASTERING EQUALIZER AVA L O N P URE C LASS A DESIGN M USIC R ECORDING S YSTEMS SONIC EXCELLENCE The Avalon AD2077 Pure Class A mastering equalizer is the most advanced, low noise, fully switched parametric equalizer available today. [. . . ] This special combination enables the AD2077 to deliver high speed transient detail at the operational extremes of real-world equalization demands. The passive high and low bands offer alternate musical tone range to the full function active parametric mid bands. Passive equalizers have long been a favorite with music lovers around the world. . full bodied, powerful (up to +/-20dB, 40dB range !) and sweet frequency selections are the benefits of the passive high-low EQ bands. The full bandwidth twin mid bands provide switched frequency selection (X10 frequency multipliers for very wide range), switched Q (width) and amplitude control. MINIMUM SIGNAL PATH DESIGN Avalon's true symmetry design offers high-voltage, large headroom, extended bandwidth and very low noise. The use of 100% discrete, Pure Class A signal amplifiers give the serious mastering engineer unlimited sonic character and a natural harmonic detail that enhances the program material and becomes one with the music itself. AD2077 MASTERING EQUALIZER AD2077 FEATURES Smooth musical detail and sonic excellence Minimum audio signal path Pure Class A, 100% discrete design Dual mono, fully switched controls Transparent active and passive filter design Very low noise -94dB High headroom +30dB Fully balanced inputs and outputs DC coupled, no transformers in audio path 104 switched frequencies per channel Mid bands use X10 frequency for extended range Wide bandwidth -3dB 1Hz to 450kHz Low distortion less than 0. 5% THD and IMD Switched range control 0. 5dB, 1dB and 2dB steps All signal routing with sealed silver relays 100% discrete power supplies for audio path External 150W toroidal power supply AVALON DESIGN Pure Class A music recording systems since 1985. c 2002 by AVALON INDUSTRIES, INC. PO Box 5976, San Clemente, California, U. S. A. Tel: 949-492-2000 Fax: 949-492-4284 www. avalondesign. com email. avalon@avalondesign. com AVALON DESIGN PURE CLASS A AD2077 DUAL MONO, MASTERING EQUALIZER AD2077 Circuit topology Output gain range Maximum input level Maximum output level Input-Output type Noise 20kHz unweighted Distortion THD, IMD Frequency response -3dB Equalizer type Bypass SPECIFICATIONS High-voltage 100% discrete, balanced and symmetrical Class A Unity gain +30dB balanced XLR pin 2 hot +32dB balanced 600 ohms, DC coupled, high-current discrete Class A XLR type, pin 2 hot balanced -94dB (EQ in) 0. 5% (typical 0. 05% at +6dB 1kHz) 1Hz to 450kHz (input band limited) Passive high and low bands plus two fully parametric mid bands Hard-wire relay bypass for equalizer L-R in-out plus silent opto switch for seamless stereo bypass. [. . . ] Tel: 949-492-2000 Fax: 949-492-4284 www. avalondesign. com email. avalon@avalondesign. com [. . . ]