The Marshall JMP1H 50th Anniversary Guitar Amplifier Head is an all-valve 1-watt amplifier specifically designed and voiced to produce the sound of Marshall products made in the 1970s. The Marshalls of that decade had a solid, punchy mid, a tight bottom-end and an aggressive yet musical overdrive when cranked, making the Super Leads the sonic mainstay of many of the ’70s most popular and influential artists.
Marshall JMP1H 50th Anniversary Guitar Amplifier Head Features
- All valve design: 2x ECC83 (12AX7) preamp valves, 2x ECC81 (12AT7) in power amp
- True Class A, single ended power amp topology
- Authentic JMP era tone
- Volume, Bass and Treble Controls
- Low power swtich on the real panel (1-watt down to .01-Watt)
- Gain Boost switch on rear panel which adds another valve stage to the signal path
- 8 and 16 Ohm speaker outputs
- Era correct cosmetics
- Commemorative 50th Anniversary rear panel plaque
- Made in England with Pride
The Marshall JMP1H amp head utilizes two ECC83 (12AX7) dual-triode valves to shape the tone and gain structure in the preamp. The Class-A, parallel single-ended power-amp topology employs two ECC81 (12AT7) dual-triode valves to wring every last drop of harmonic mojo from the circuit. The added bonus is that you get that distinctive Super Lead tone but at the neighbor-friendly volume of 1-Watt. The additional attenuation offered by the Low Power button on the JMP1H amp's rear-panel drops the power from 1 watt to .01 watt!
Like all of the 50th Anniversary, 1 Watt, all valve heads and combos, the Limited Edition JMP-1H is built at Marshall's factory in Bletchley, England, with a huge amount of Pride. And, like all the products they build at their UK HQ, the amount of that all important, human hands on involvement and expertise is high.