Classic Recording Studio Gear

Vintage Digital

GML Model 8200 Parametric Equaliser

Brought to you from the man who invented and coined the term “Parametric Equalisation”, the GML Model 8200 has been an industry standard for almost forty years and can be found on virtually every major recording studio’s stereo bus.

2001
Equalisers, GML

GML Model 8200 Parametric Equaliser Details

Each of the five broadly overlapping bands on the GML Model 8200 Parametric Equalizer offers 15dB of Boost or Cut and adjustable bandwidth (or “Q”) from 0.4 to 4. The lowest and highest bands also can be switched to Shelf mode.

Quite simply, the GML Model 8200 is the archetype Stereo Parametric Equaliser. Its extraordinary resolution, benchmark transparency, generous headroom, and surgical precision have been the reference for many other equalisers but exceeded by no other. The 2U 8200 uses one 8355 PSU.

The GML Model 8200 Parametric Equaliser has become the reference standard due in large part to its features:

All-discrete, Class-A design; no integrated circuits to compromise the audio path
GML Model 8200 features 2 Channels, 5 Bands: Fully Parametric
- 15Hz-800Hz,Qof.4-4orshelving,15dBboost/cut
- 15Hz-800Hz,Qof.4-4,15dBboost/cut
- 120Hz-8kHz,Qof.4-4,15dBboost/cut
- 400Hz-26kHz,Qof.4-4,15dBboost/cut
- 400Hz-26kHz,Qof.4-4orshelving,15dBboost/cut
No interstage or coupling capacitors to add distortion or degrade over time
Transformerless; precision electronically balanced input buffer and DC servo stabilised direct-coupled output
Carbon-film precision potentiometers, manufactured to GML exacting standards
Designed with GML 9202 low-noise, low-distortion, wide dynamic range, wide bandwidth precision discrete opamp
No tantalum, ceramic, or electrolytic capacitors in the signal path
Precious-metal interconnects
High-quality XLR interconnects, Au over Ag
Illuminated push-button switches for “EQ In” and “EQ Out”
LED power indicator
Multi-coloured knobs, GML standard
Rugged and stylish, black-anodised aluminium chassis
Reverse-anodised lettering, much more permanent than ink or paint processes
Quality PCB manufacturing, assembly, and chassis construction

Specifications

Input
- 20 kOhm balanced bridging
- 32 dB common mode rejection at 20kHz
- +27.4 dBv maximum before clipping (±28 VDC supplies)
Throughput
- ±0.1 dB, 10 Hz to 80 kHz response (controls set flat)
- 0.002% Harmonic distortion at any frequency 20 Hz – 20 kHz1
- 0.002% SMPTE Intermodulation distortion2
- 30 v/usec discrete low noise, high performance amplifiers
- no tantalum or electrolytic interstage or output coupling capacitors
- noise -97.5 dBv bypassed, -78 dB or better typical (control position dependent)
- rolloff: 3 dB down at 260 kHz
Output
- +27.4 dBv clipping
- 3 mv output offset, stabilized by D.C. servo correctio
Other
- external power supply: ±28 volts
- separate ground and chassis connections at rear
- 19″ x 3 1/2″ rack case, black anodized aluminium, silver legend, 8 1/2″ deep weight: 6 lb

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The details provided above are drawn from historical documents like advertising brochures or user manuals. They’re shared without bias or review. This info is given solely for your consideration, helping you gauge its usefulness to you.

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Plugin Alternatives for GML Model 8200 Parametric Equaliser

Pulsar 8200

Pulsar 8200 is a faithful emulation of the legendary GML 8200 designed by George Massenburg*, the inventor of the parametric EQ. Full EQ control is a formality today, but it was a dazzling novelty back in the days.