GML 8200 Parametric Equalizer Series II

Controls: Illuminated push-button EQ In/Out per channel; 5 overlapping bands (Low, Low-Mid, Mid, High-Mid, High), each continuously variable +/-15dB boost/cut; dual-concentric Frequency/Q knobs, Q variable 0.4-4; Low and High bands switchable to shelving mode; power LED

I/O: XLR in/out per channel (unbalanced XLR output, pin 2 hot); requires external DC power supply via 5-pin XLR (GML 8355 or 2555, sold separately)

Notable use: Industry-standard parametric EQ found on stereo buses in top mixing and mastering studios worldwide; designed by George Massenburg, widely credited as the inventor of the parametric equalizer concept

Notes: All-discrete, Class-A, transformerless design confirmed via GML owner's manual (massenburg.com/wp-content/uploads/2020/02/GML8200man.pdf). GML does not publish MSRP on massenburg.com; an authorized dealer (Professional Audio Design) currently lists this at $8,360 USD -- shown here as reference only, price_usd left blank per no-guess rule since it is a dealer price, not a confirmed GML MSRP. year_intro left blank: 2001-dated manual describes the 8200 as the 'fifth-generation' design with 'nearly twenty years of limited manufacturing' at that time, implying an original design circa early 1980s, but no exact year is stated. country_of_manufacture inferred from GML LLC's Franklin, TN, USA company address (not an explicit 'Made in USA' statement on the product page). Requires a separate GML power supply (8355, now largely superseded by the 2555); PSU is an accessory and out of scope for this catalog entry.