1987 Mesa Boogie – Quad Preamp – All Original – ID 5691

The Quad Preamp is no longer built - and original, unmodified examples are becoming rare.
The Mesa Boogie Quad Preamp from 1987 combines two complete Mark Series preamp sections in one rack-mount cabinet - clean to singing lead with endless sustain.
This example is all original, including the original tube assembly (8x Mesa 12AX7). Not a reissue. No mod.
A real piece of 80s Mesa history - exactly the sounds that were used by Metallica can be heard.
Completely checked in our workshop.

Year of construction: 1987
✅ Condition: All original
Tubes: 8x 12AX7 (original equipment)
✅ Channels: 2 independent preamp sections
✅ Graphic EQ
✅ Rack format
✅ Including original Mesa FU-2 footswitch