Marshall JCM 900 Dual High Gain Reverb 4100

Dual Reverb Flexibility

A wide variety of combo and head formats
Two independent channels
Independent Gain and Volume controls
Treble, Middle, Bass and Presence tone controls
Reverb level controls for each channel
Series Effects loop
Compensated Line Out
High to Low power switch [100 Watts down to 50 Watts on 100 Watt models and 50 Watts down to 25 Watts on 50 Watt models]
Valve failure LEDs.
Unique fail-safe circuit on 100 Watt models to keep the amp running in the event of a valve failure to get you through to the end of the gig.