Marshall Studio 900 SN20C 20W 1x12" Tube Guitar Combo Amp
The Marshall Studio 900 SN20C is a 20 W two-channel guitar combo with built-in reverb and a 12 in. speaker that brings back the 90s JCM900 sound in a format you can carry alone, from sparkling cleans to overdriven solos.
What sets it apart
- Two channels to go from clean to overdrive
- Built-in reverb
- 20 W, 5 W or under 1 W
- 12 in. Celestion G12T-75
- DI output and compensated DI output
- Made in Bletchley, England
The JCM900 as a combo
The original JCM900 was a 100 W head. Marshall says it captures that sound in this 20 W combo, with the same idea: a clean channel, an overdrive channel, and reverb ready to go.
It's the amp for a guitarist who plays a whole song, clean verses and overdriven choruses, without a pedal.
Three power levels and direct recording
The combo goes from 20 W to 5 W, then under 1 W, for late playing without giving up the valve sound. The two DI outputs send the signal to an interface; the compensated one is intended for direct recording.
Marshall describes a hybrid design that pairs the warmth of valves with the reliability of solid-state components.
Specifications
| Power | 20 W, 5 W, under 1 W |
|---|---|
| Channels | 2 |
| Valves | 2 × ECC83, 1 × ECC83 phase splitter, 2 × 5881 |
| Speaker | 1 × 12 in. Celestion G12T-75 (16 Ω, 75 W) |
| Reverb | Built-in |
| Outputs | 5 × 1/4 in. speaker jacks (16, 8, 4 Ω), DI, compensated DI |
| Effects loop | Yes |
| Dimensions | 510 × 460 × 255 mm |
| Weight | 17.9 kg |
| Made in | Bletchley, United Kingdom |
What it's for
- 90s rock cover band
- Late-night practice under 1 W
- Home recording via the compensated DI
- Small venues, no complex pedalboard needed
Compared with other manufacturers
Other tube combos of about 20 to 30 W are made by these manufacturers:
| Maker | Model | Power | Power valves | Speaker |
|---|---|---|---|---|
| Marshall | Studio 900 SN20C | 20, 5 or < 1 W | 2 × 5881 | 12 in. Celestion G12T-75 |
| Blackstar | HT-20R MK III | 20 W, or 2 W | 2 × EL84 | 12 in. Blackstar |
| Orange | TH30 Combo | 30, 15 or 7 W | 4 × EL84 | Voice of the World |
| Mesa/Boogie | Fillmore 25 1x12 | 18 W clean, 23 W max | 2 × 6V6 | 12 in. Celestion Custom 90 |
| Peavey | Classic 30 | 30 W RMS | 4 × EL84 | Celestion Midnight 60 |
Frequently asked questions
- Is the Studio 900 all-tube?
- It uses ECC83 valves and two 5881s in the power section. Marshall does, however, describe it as a hybrid, with solid-state components, without saying which.
- Studio 900 or Studio Classic?
- The Studio 900 has two channels and reverb; the Studio Classic (JCM800) has one channel and no reverb.
- What is the compensated DI output for?
- It's for recording or feeding the PA directly from the amp, in addition to the standard DI output.
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