Model/Circuit Number: JCM900 2501 Years of Production: 1990 – 1999 Configuration: Combo Controls: Gold aluminum front-facing, Controls: 1-10 Knobs: Gold Knobs with Black Pointer Faceplate: Front: Input, Pre-Amp, Gain, Master (Channel A), Master (Channel B), Treble, Middle, Bass, Presence, Footswitch, Standby, Power Rear: Effects (Loop Level, Send, Return), Line Output (Recording Compensated, Direct), Impedance Select [...]

Model/Circuit Number: 4100 Years of Production: 1990 – 1999 Era: Configuration: Head Controls: Gold aluminum front-facing, Controls: 1-10 Knobs: Gold KnobsBlack Pointer Faceplate: Front: Power, Stand-by, Footswitch, Volume & Reverb (Channel B), Volume & Reverb (Channel A), Presence, Bass, Middle, Treble, Leadgain (Preamp Channel B), Gain (Preamp Channel A), Input Rear: Effects (Loop Level, Send, [...]