Marshall 9100 Dual MonoBloc Amplifier – Marshall 5881 – Made in UK – 100W Stereo Power Amp

For sale is a Marshall 9100 Dual MonoBloc Amplifier, a professional tube stereo power amp from the Marshall 9000 series, manufactured in Great Britain. This model was designed for rack guitar systems and is widely known for pairing perfectly with classic Marshall rack preamps such as the JMP-1.

The Marshall 9100 delivers 2×50 watts (100W total) of tube power using 5881 power tubes, offering a tight low end, strong dynamics and the unmistakable punch associated with Marshall amplification.

The Dual MonoBloc design means that each channel operates as an independent power amplifier. This provides excellent channel separation and makes the unit ideal for stereo rigs, rack preamps, guitar processors, or wet/dry setups.

Each channel has its own level control and switching on the front panel, while the rear panel provides multiple speaker outputs with selectable impedance (4 / 8 / 16 Ohm) for both channels.

The Marshall 9100 became a staple of professional rack systems in the 1990s, used by many touring guitarists who needed reliable tube power in a rack format.

Condition

The cosmetic condition is as shown in the photos.
There are visible signs of use typical for rack-mounted equipment, including scratches on the top of the chassis.

The amplifier works properly and produces full output.

Specifications

Model: Marshall 9100 Dual MonoBloc
Series: Marshall 9000
Production: Made in Great Britain

Power Output:
• 2 × 50W (Stereo)
• 100W total

Power Tubes: 5881

Operation Modes: Stereo / Dual Mono

Speaker Outputs: Channel A / Channel B
Impedance: 4 / 8 / 16 Ohm

Inputs: Channel A / Channel B