Marshall 2100SL-X (JCM 900) 100 watt guitar amplifier:

• Extra ECC83 [12AX7] valve in the pre-amp
• (foot)switchable master volumes
• 4 band EQ
• Pre-amp volume control (0-10) and Gain sensitivity (10-20!)
• Series Effects loop
• Direct recording Line Out
• Valve failure LEDs.
• Two channels with independent Gain and Volume controls
• Treble, Middle, Bass and Presence tone controls
• 100w Pentode/50w triode switch
• Fail-safe circuit to keep the amp running in the event of a valve failure
• channel footswitch
• Dimensions: 750 x 310 x 220 mm
• Weight: 18.4 Kg