Bertha amp settings — Vox valvetronix ad15vt
The Bob weir grateful dead guitar tone for “Bertha”, dialed in for a Vox valvetronix ad15vt with a Carvin DC 200. Skull & Roses live release (recorded April 27, 1971 at Fillmore East)
Gibson ES-335 / ES-345 into Fender Twin Reverb (JBL D120F speakers)
| Knob | Setting (0–10) |
|---|---|
| Gain | 3 |
| Bass | 4 |
| Mid | 6 |
| Treble | 7 |
| Reverb | 2 |
| Master | 7 |
01Boss GT-100 Compressor (CS block)
In front of amp to tame transients and give Weir's percussive chop consistent snap
The AD15VT's 'Black 2x12' models the iconic Fender Twin Reverb Bob used during this era. Because the Carvin DC 200 has hot humbuckers compared to a vintage hollowbody, using both pickups together with volume slightly rolled off prevents preamp clipping and gives the chimey, scooped rhythm presence necessary for Weir's chord inversions. Presence is null as the AD15VT faceplate only features standard 3-band EQ.
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These settings are for a Vox valvetronix ad15vt. ToneAdapt matches any song to whatever amp, guitar and pedals you own — first match is free.
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