REAL 1967 Supro 'Thunderbolt' guitar amp - $1,900 (Shrewsbury)

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1967 Supro 'Blackie'....about as good shape as anyone could expect, probably one of the nicest examples available. CTS 137 605 alnico 15" speaker, actual point-to-point wiring, original hand wound interleaved transformers, class A cathode biased....3-prong power cord installed, for safety ('death' caps removed) w/ varistor protection, new electrolytic filter cap (quiet when warmed up), lightweight resonate solid pine cabinet & a Custom Amp Covers, also made in USA.

Needless to say, this amp screams natural vintage grinding overdrive tone when cranked! You could think of it as a more powerful, larger 35w, 6L6 Tweed Deluxe. :)
And yes, it sounds tremendous for blues harp!

From Vintage Guitar mag-
"– its sound is the epitome of one thing: huge, raw, gnarly, overdriven, big-shouldered, blues tone heaven"
"the S6420 proved a brilliant guitar amp – one of the best ever made – by anyone"

https://www.vintageguitar.com/28836/supro-thunderbolt

Think kinda like a Lazy J.... :)

$1,900.

p.s. These are also the 6L6 type Supro amps used by Brian Setzer, Jimi Hendrix, & Jimmy Page.

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post id: 7876387955

posted: 2025-08-25 08:57

updated: 2025-12-07 09:33

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REAL 1967 Supro 'Thunderbolt' guitar amp - musical instruments - by...

1967 Supro 'Blackie'....about as good shape as anyone could expect, probably one of the nicest examples available. CTS 137 605 alnico 15" speaker, actual point-to-point wiring, original hand wound...