Marshall Studio JTM ST20H Head
Professional music gear - detailed information and where to buy
Marshall
Studio JTM ST20H Head
Product Info
Article Number:
550465
Brand:
Marshall
Model:
Studio JTM ST20H Head
Category:
Tube Guitar Heads
Price:
$933.90
* Prices may vary. Check retailer for current pricing and availability.
This JTM ST20H is a seriously cool little head. It nails that classic Marshall crunch and cleans – think early Who or Stones – without needing a massive stack. It's ideal for players wanting a vintage vibe and a manageable volume for home or smaller gigs.
Product Description
- Marshall Studio JTM ST20H Head
- Tube Head for Electric Guitar
- Based on the classic vintage look
- Sound from vintage to crunch
- 20 watts with power reduction to 5 Watts
- Preamp tubes: 3 x ECC83
- Power tubes: 2 x 5881
- Controls: Treble
- Middle
- Bass
- Presence
- Loudness 1
- and Loudness 2
- DI out
- Serial FX loop
- Impedance selector switch: 1 x 16 ohm
- 1 x 8 ohm (2 x 16 ohm)
- 1 x 4 ohm (2 x 8 ohm)
PROS
- • Classic Marshall tone delivered with a manageable 20 watts.
- • The 5-watt mode is perfect for apartment practice without complaints.
- • ECC83 preamp and 5881 power tubes provide authentic vintage warmth.
- • DI out and FX loop offer flexibility for recording and pedal experimentation.
CONS
- • Limited tonal versatility; primarily excels in classic rock/blues territory.
- • Relatively heavy for a 20-watt head; portability is a consideration.
- • The single channel design requires more finesse to dial in different tones.
Product Video
Key Features
Power (Watts)
20 Watts (switchable to 5 Watts)
Tubes
3 x ECC83 (Preamp), 2 x 5881 (Power)
Channels
1 (with gain shaping via Presence and Loudness controls)
Effects
Serial FX Loop
Speaker Output
1 x 16 ohm, 1 x 8 ohm (2 x 16 ohm), 1 x 4 ohm (2 x 8 ohm)
Weight
Approximately 18kg (39.7 lbs)
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Frequently Asked Questions
The ST20H captures the essence of the JTM45, but with less headroom and a slightly more compressed feel due to the lower wattage.
It's more of a general 'brightness' adjustment, impacting the high-frequency response and overall articulation – use it judiciously to avoid harshness.
While it's *possible*, it's not recommended; the circuit is designed specifically for 5881s and changing tubes can affect tone and potentially damage the amp.
