Mesa Boogie Quad Preamp Rackmount Tube Guitar Preamplifier - Circa 1989 - Black

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Mesa/Boogie Quad Preamp — Vintage All-Tube Rack Guitar Preamplifier — Circa 1989 — USA — Serial 01438 Reverb Condition: Good Asking Price: $1,999.99 + Shipping — Offers Welcome POWERED ON AND TESTED IN STORE Offered is an original-era Mesa/Boogie Quad Preamp, handcrafted in Petaluma, California, USA. This professional rackmount tube guitar preamplifier combines two independently voiced channels, four selectable operating modes, dual five-band graphic equalizers, and built-in spring reverb. The Quad was developed as part of Mesa/Boogie's professional rack amplification system and remains an important example of the company's late-1980s all-tube preamplifier design. PRODUCTION YEAR AND IDENTIFICATION - Manufacturer: Mesa/Boogie - Model: Quad Preamp - Rear serial label: 01438 - Production era: 1987–1990 original-generation Quad - Estimated manufacturing year: Circa 1989 - Country: USA - Manufacturing location: Petaluma, California - Finish: Black - Format: 19-inch rackmount, three rack spaces Mesa's documented production chronology places the original Quad Preamp within September 1987 through August 1990, with the later FU-2A generation beginning in August 1990. Serial 01438 is consistent with the original production generation. The exact manufacturing date has not been independently verified. ORIGINAL MESA DESIGN The Quad incorporates two independent all-tube preamplifier channels sharing a common instrument input. Mesa's original operating instructions describe Channel 1 as closely related to the Mark IIC design and Channel 2 as closely related to the Mark III. Channel 1 — Rhythm 1 / Lead 1 Designed for classic Mesa clean and lead voicings, with independent controls for: - Volume - Treble - Bass - Middle - Master - Lead Drive - Lead Master Additional pull-function tone shaping includes Bright, Shift, Deep, and Lead Bright functions as identified on the panel. Channel 2 — Rhythm 2 / Lead 2 Voiced for a wider range of crunch, overdrive, and high-gain a