The Marshall Studio JTM ST20C MkII 20W 1x12 Combo is a Marshall amplifier. Close alternatives include the Soldano SLO and the Friedman IR-J Jake E. Lee Preamp. It pairs well with the Vox Valvenergy Copperhead Drive and the ProCo RAT 2.
Marshall Studio JTM ST20C MkII 20W 1x12 Combo
Marshall · amplifier
The Marshall Studio JTM ST20C is a 20-watt 1x12 combo based on the very first Marshall heads, the JTM circuits that predate even the 1959 Super Lead Plexi. It runs 5881 output tubes rather than the EL34s used across most of the Marshall range, which is a large part of why it sounds different: warmer, rounder and more American-flavoured, reflecting the JTM's origins as a reworking of the Fender Bassman circuit. That places it at the opposite end of the Studio series from the aggressive JCM800-based SC20, with a softer and more gradual breakup. Power switches down for lower-volume use. It suits blues, blues rock and classic rock players wanting the earliest Marshall voice.
What stands out
“the marshall studio jtm st20c is a 20-watt 1x12 combo based on the very first marshall heads”
— from the listing
“Used for blues and classic rock, and takes low-gain overdrives well”
— from the community notes
“Most praised for warmth and gradual breakup”
— from the community notes
“It suits blues, blues rock and classic rock players wanting the earliest Marshall voice”
— from the listing
“that places it at the opposite end of the studio series from the aggressive jcm800-based sc20”
— from the listing
Trade-offs
“bought by players who find later marshalls too bright or aggressive and want the warmer original voice”
— from the community notes
- studio
- classic rock
- breakup
- blues rock
- aggressive
- low gain
- overdrive
- tube
Good for
- Live
- Studio
- Worship
- Practice
Genres the Marshall Studio JTM ST20C MkII 20W 1x12 Combo is commonly used in
- Blues
- Classic Rock
- Blues Rock
- Rock
cited
Inferred from shared tonal signals, not a stated genre tag. - Alternative
cited
Inferred from shared tonal signals, not a stated genre tag. - Hard Rock
cited
Inferred from shared tonal signals, not a stated genre tag.
Pedals that stack with the Marshall Studio JTM ST20C MkII 20W 1x12 Combo
Vox Valvenergy Copperhead Drive
Vox
37% matchfills a frequency gapFills in a frequency range the other side doesn't cover, instead of piling more onto what's already there. (bright → smooth)
Marshall Studio JTM ST20C MkII 20W 1x12 Combo's smooth balances out the bright tone
Goes in front of the amp
ProCo RAT 2
Proco
35% matchpushes an amp at the edge of breakupPushes an amp already sitting at the edge of breakup over the line. (edge of breakup → low gain)
ProCo RAT 2 pushes a edge of breakup tone toward low gain
Goes in front of the amp
Browne Amplification Gritador
Browne Amplification
34% matchpushes an amp at the edge of breakupPushes an amp already sitting at the edge of breakup over the line. (edge of breakup → mid-forward)
Browne Amplification Gritador takes that edge of breakup character and pushes it toward mid-forward
Goes in front of the amp
Analog Man King of Tone
Analog Man
34% matchpushes an amp at the edge of breakupPushes an amp already sitting at the edge of breakup over the line. (edge of breakup → clean boost)
Analog Man King of Tone pushes a edge of breakup tone toward clean boost
Goes in front of the amp
Fulltone OCD
Fulltone
32% matchpushes an amp at the edge of breakupPushes an amp already sitting at the edge of breakup over the line. (edge of breakup → low gain)
What Marshall Studio JTM ST20C MkII 20W 1x12 Combo brings here leans toward edge of breakup — that's worth building a pairing around
Goes in front of the amp
AnalogMan Beano Boost
Analog Man
31% matchfills a frequency gapFills in a frequency range the other side doesn't cover, instead of piling more onto what's already there. (bright → smooth)
Marshall Studio JTM ST20C MkII 20W 1x12 Combo leans smooth right where the bright tone needs it
Goes in front of the amp
WEM CCB-1 Copicat Boost
Wem
28% matchclean platform takes the driveA clean, high-headroom stage takes on dirt it can't generate by itself. (transparent → low gain)
Marshall Studio JTM ST20C MkII 20W 1x12 Combo leans this transparent tone toward low gain, which it doesn't make on its own
Goes in front of the amp
Jackson Audio Prism
Jackson Audio
27% matchfills a frequency gapFills in a frequency range the other side doesn't cover, instead of piling more onto what's already there. (bright → smooth)
Run Marshall Studio JTM ST20C MkII 20W 1x12 Combo after it and the bright edge settles into something more smooth
Goes in front of the amp
See all 34 pedals that pair with the Marshall Studio JTM ST20C MkII 20W 1x12 Combo →
Alternatives
Soldano SLO
Soldano
72% similaritySoldano SLO recreates this amp's tone in pedal form
Friedman IR-J Jake E. Lee Preamp
Friedman
72% similarityFriedman IR-J Jake E. Lee Preamp recreates this amp's tone in pedal form
Strymon Iridium
Strymon
72% similarityStrymon Iridium recreates this amp's tone in pedal form
Friedman IR-D
Friedman
72% similarityFriedman IR-D recreates this amp's tone in pedal form
Friedman Dirty Shirley
Friedman
56% similarityShared character: touch, crunch, warm
Sears Silvertone 6x10 100-Watt Combo Amp
Silvertone
55% similarityShared character: crunch, clean, lead
Marshall Studio Vintage SV20C
Marshall
54% similarityShared character: crunch, studio, lead
1959 Fender Tweed Deluxe
Fender
53% similarityShared character: touch, crunch, classic rock
Magnatone Lil Viper
Magnatone
53% similarityShared character: compact, crunch, warm
Magnatone Super Fifteen 15W 1x12 Combo
Magnatone
52% similarityShared character: touch, aggressive playing, classic rock
Gibson EH-150
Gibson
51% similarityShared character: warm
Fuchs ODS Classic 25/50 Combo
Fuchs
50% similarityShared character: touch, crunch, warm
See all alternatives to the Marshall Studio JTM ST20C MkII 20W 1x12 Combo (cheaper + boutique) →
Questions people ask
What are good alternatives to the Marshall Studio JTM ST20C MkII 20W 1x12 Combo?+
The closest matches in character are the Soldano SLO, the Friedman IR-J Jake E. Lee Preamp, the Strymon Iridium.
What pairs well with the Marshall Studio JTM ST20C MkII 20W 1x12 Combo?+
Strong matches from rig and tone-complementarity evidence: Vox Valvenergy Copperhead Drive, ProCo RAT 2, Browne Amplification Gritador — Marshall Studio JTM ST20C MkII 20W 1x12 Combo's smooth balances out the bright tone.