Marshall JMP 1992 Super Bass 2-Channel 100-Watt Guitar / Bass Head 1974
The 1974 Marshall JMP Model 1992 Super Bass is a 100-watt all-tube head delivering the unmistakable raw power and harmonic richness of early '70s Marshall amps. Originally designed for bass, the Super Bass circuit is widely favored by guitarists for its rounder low end, smooth gain structure, and explosive dynamics. This amp features a classic plexi-style circuit with dual channels, four inputs, and a non-master volume design, making it ideal for cranked tones and pedal-friendly setups.
The transformer power transformer and circuit include period correct replacement parts. There are a few scrapes and tears in the tolex, but overall for a 50+ year old amp I would call this one excellent
Specs
- Brand: Marshall
- Series: JMP
- Model: Super Bass Model 1992
- Year: 1974
- Country: UK
- Serial: 1295C
- Condition: Excellent
- Power: 100W
- Type: Head
- Exterior Material: Tolex
- Exterior Color: Black
- Panel: Gold Anodized
- Preamp Tubes: 3x ECC83 (12AX7)
- Power Tubes: 4x EL34
- Channels: 2 (Normal, High Treble)
- Inputs: 4 (2 per channel, bridgeable)
- Effects Loop: No
- Output Impedance: 4Ω, 8Ω, 16Ω
- Outputs: 4 Speaker Outputs
- Controls:
-
- Presence
- Bass
- Middle
- Treble
- Volume (Normal)
- Volume (High Treble)
- Service: Standard Maintenance Completed
Marshall JMP 1992 Super Bass 2-Channel 100-Watt Guitar / Bass Head 1974
The 1974 Marshall JMP Model 1992 Super Bass is a 100-watt all-tube head delivering the unmistakable raw power and harmonic richness of early '70s Marshall amps. Originally designed for bass, the Super Bass circuit is widely favored by guitarists for its rounder low end, smooth gain structure, and explosive dynamics. This amp features a classic plexi-style circuit with dual channels, four inputs, and a non-master volume design, making it ideal for cranked tones and pedal-friendly setups.
The transformer power transformer and circuit include period correct replacement parts. There are a few scrapes and tears in the tolex, but overall for a 50+ year old amp I would call this one excellent
Specs
- Brand: Marshall
- Series: JMP
- Model: Super Bass Model 1992
- Year: 1974
- Country: UK
- Serial: 1295C
- Condition: Excellent
- Power: 100W
- Type: Head
- Exterior Material: Tolex
- Exterior Color: Black
- Panel: Gold Anodized
- Preamp Tubes: 3x ECC83 (12AX7)
- Power Tubes: 4x EL34
- Channels: 2 (Normal, High Treble)
- Inputs: 4 (2 per channel, bridgeable)
- Effects Loop: No
- Output Impedance: 4Ω, 8Ω, 16Ω
- Outputs: 4 Speaker Outputs
- Controls:
-
- Presence
- Bass
- Middle
- Treble
- Volume (Normal)
- Volume (High Treble)
- Service: Standard Maintenance Completed