GML 8200 (Series II)
A dual-channel, 5-band parametric equalizer designed by the engineer who pioneered parametric equalization.
Overview
The GML 8200 Parametric Equalizer, also known as the Series II, is a stereo bus EQ built by George Massenburg Labs. It's a dual-channel, 5-band unit widely recognized as the reference standard in parametric equalization. George Massenburg, the inventor of the concept, led its design over ten years of development, resulting in a fifth-generation progressive design. Marketed as a benchmark for stereo bus EQs, the 8200 has held an industry-standard position for nearly four decades.
Specifications
| Product type | Dual-Channel 5-Band Parametric Equalizer |
| Frequency Response | ±0.1 dB, 10 Hz to 80 kHz response (controls set flat) |
| Input Impedance | 20 kOhm balanced bridging |
| Common Mode Rejection | 32 dB common mode rejection at 20kHz |
| Channels | Dual-channel (2-channel) |
| Number of bands | 5-band |
| Power Supply | 8355 Power Supply |
Design
The GML 8200 was designed by George Massenburg, the engineer who invented and coined the term "Parametric Equalization." It represents the fifth generation of his progressive design work and is described as the evolution of his groundbreaking parametric equalizer concept. Each band features a Frequency potentiometer to set the center frequency, and the unit is noted for its precision and transparency. The Series II version reflects a decade of listening analysis and refinement.
Context
For nearly forty years, the GML 8200 has served as the gold standard against which other stereo bus EQs are measured. It has maintained an industry-standard reputation since its introduction, praised for its sonic accuracy and build quality. As a reference-grade device, it has influenced the design and evaluation of parametric equalizers across professional audio.
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