The Studio JTM line of amplifiers replicates the renowned, velvety tones of the original Marshall JTM, and it looks every bit as wonderful as it sounds. Whether it's played live or at home, let the JTM's all-valve, era-defining sound steal the show.

With the G12M-65 Creamback, you can achieve the timeless G12M tone while still accommodating higher power levels. This speaker is an excellent choice for modern players that desire a vintage sound. The enhanced power handling brings a rich low end, complementing the warm mid-range, crunchy upper-mids and refined highs. 

Skilfully crafted at our factory in Bletchley, England, the Studio JTM effortlessly captures the Marshall spirit. After years of development, this amp brings you the iconic warm and smooth tones of the original JTM. It’s also fashioned with classic Marshall touches, including a solid metal 'coffin' logo and gold piping and beading that harks back to the 1960s. The Studio JTM is sure to turn heads and ears.

This amplifier gives you the flexibility to adjust your power output based on your surroundings. Choose between 20W and 5W power output at the flick of a switch. Perfect for jumping from the rehearsal room to your home and back again.

Model ST20C Range Studio WATTAGE 20W (with power reduction option to 5W) CHANNELS 2, Bridgeable Output wattage 20W (with power reduction option to 5W) OUTPUTS SPEAKER OUTPUTS: 5 X 1/4" JACK SOCKETS (16Ω LOAD / 8Ω LOAD / 4Ω LOAD), DI (1/4" JACK) INPUTS 4 X 1/4" JACK INSTRUMENT INPUTS (HIGH/LOW SENSITIVITY) controls NORMAL/LOUDNESS II, HIGH TREBLE/LOUDNESS I, TREBLE, MIDDLE, BASS, PRESENCE Effects None Effects loop YES, 1 X SERIES SWITCHABLE Speaker configuration 1x12” power handling 65W Speaker model Celestion G12M-65 Creamback (16Ω, 65W) Unit impedance 16Ω Preamp valves 2 x ECC83, 1 x ECC83 (phase splitter) Power amp valves 2 x 5881 UNIT DIMENSIONS WEIGHT (KG) 17.8kg / 39.2lbs WIDTH (MM) 500mm / 19.7" HEIGHT (MM) 460mm / 18.1" DEPTH (MM) 265mm / 10.4"