Two classic amps, two different voices. The Marshall Plexi is open, dynamic, lower-gain vintage; the Peavey 5150 is bright, aggressive, tight high-gain. Here is how their settings and the records made on them compare.
| Knob | Marshall Plexi | Peavey 5150 |
|---|---|---|
| Gain | 6 | 7 |
| Bass | 5.5 | 5.5 |
| Mid | 6.5 | 5.5 |
| Treble | 6.5 | 6.5 |
| Presence | 5.5 | 6 |
Averaged from 60 (Marshall Plexi) and 29 (Peavey 5150) famous recordings. Out of 10.
Go Marshall Plexi if you want open, dynamic, lower-gain vintage. Go Peavey 5150 for bright, aggressive, tight high-gain. 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. Marshall Plexi is open, dynamic, lower-gain vintage; Peavey 5150 is bright, aggressive, tight high-gain. 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 Marshall Plexi sits at gain 6, bass 5.5, mid 6.5, treble 6.5, presence 5.5; the Peavey 5150 at gain 7, bass 5.5, mid 5.5, treble 6.5, presence 6. The biggest gap is gain, where the Peavey 5150 runs noticeably higher.
Notable Marshall Plexi tones include Sweet Child O' Mine, Ain't Talkin' 'Bout Love, Sweet Child O' Mine. Notable Peavey 5150 tones include Duality, Epidemic of Hate, Praise the Lord (Opium of the Masses). GuitarToneAdapt can re-dial any of them onto the amp and guitar you already own, free.