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General| Brand | Marshall Amplification |
|---|---|
| Model | JCM 900 4100 |
| Category | Musical Instrument Amplifier |
| Language | English |
Details on connecting the mains power lead and the correct fuse type for the amplifier.
Guidelines for safely unplugging and moving the amplifier to prevent damage.
Step-by-step guide for connecting the amplifier and safely powering it on.
Connects the instrument to the amplifier using a high quality screened lead.
Sets the gain level for Channel A, from clean to crunch tones.
Sets the gain level for the boosted Channel B, for lead and shred tones.
Passive EQ circuit (Treble, Middle, Bass, Presence) for tonal variation.
Adjusts the amount of reverb for Channel A.
Controls the overall volume level for Channel A.
Adjusts the amount of reverb for Channel B.
Controls the overall volume level for Channel B.
Indicates when Channel B is selected, manually or via footswitch.
Connects the remote footswitch for channel switching and reverb.
Used with the power switch to warm up valves and prolong their life.
The main on/off switch for the amplifier's power supply.
Adjusts FX Loop level to match processors or pedals.
Connects to the input and output of external effects.
Compensated and Direct outputs for recording or external amplifiers.
Two-way switch for matching amplifier and speaker impedance.
Connects speaker cabinets, ensuring they handle the full amplifier power.
Switches between HIGH (pentode) and LOW (triode) power output modes.
Indicates output valve failure and protects individual valve circuits.
Connects the amplifier to the mains power supply, ensuring voltage match.
Protects the amplifier and mains supply in case of a fault.
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