Two classic amps, two different voices. The Peavey 6505 is brutal, tight, scooped metal high-gain; the Marshall JCM800 is midrange-forward 80s rock crunch. Here is how their settings and the records made on them compare.
| Knob | Peavey 6505 | Marshall JCM800 |
|---|---|---|
| Gain | 8.5 | 6.5 |
| Bass | 6 | 6 |
| Mid | 4.5 | 6 |
| Treble | 7 | 7 |
| Presence | 6.5 | 6 |
Averaged from 9 (Peavey 6505) and 84 (Marshall JCM800) famous recordings. Out of 10.
Go Peavey 6505 if you want brutal, tight, scooped metal high-gain. Go Marshall JCM800 for midrange-forward 80s rock crunch. But the real point: you do not need either one. GuitarToneAdapt takes any tone recorded on these amps and re-dials it for the amp and guitar you actually own — free.
🎛️ Get either amp’s tones on YOUR rig — free →Neither is "better" — they are voiced differently. Peavey 6505 is brutal, tight, scooped metal high-gain; Marshall JCM800 is midrange-forward 80s rock crunch. Pick by the tone you want, then adapt the settings to the amp you actually own.
Averaged across the famous recordings on each (knobs out of 10), the Peavey 6505 sits at gain 8.5, bass 6, mid 4.5, treble 7, presence 6.5; the Marshall JCM800 at gain 6.5, bass 6, mid 6, treble 7, presence 6. The biggest gap is gain, where the Peavey 6505 runs noticeably higher.
Notable Peavey 6505 tones include Duality, Sign Of Life, Like Light to the Flies. Notable Marshall JCM800 tones include Master of Puppets, Fade to Black, Mayonaise. GuitarToneAdapt can re-dial any of them onto the amp and guitar you already own, free.