ENGLISH From Jim Marshall I would like to personally thank you for selecting one of our JCM 2000 Dual Super Lead valve amplifiers. Since I started Marshall Amplification in 1962 I have witnessed some incredible breakthroughs and advances in amplifier design technology, such as master volume amps, switchable channels, reverb, MIDI technology, speaker emulation and digital effects processing, to name just a few. These may seem like every day features nowadays but this certainly wasn’t always the case.
ENGLISH WARNING! - Important safety instructions A. B. C. D. E. ALWAYS fit a good quality mains plug conforming to the latest B.S.I. standards where necessary (UK only). NEVER attempt to by-pass the fuses or fit ones of the incorrect value. NEVER attempt to replace fuses or valves with the amplifier connected to the mains. DO NOT attempt to remove the amplifier chassis, there are no user serviceable parts. Refer all servicing to qualified service personnel.
On top of this, the DSL401 offers a three channel option by having the ability to (foot)switch between OD1 and OD2 - OD2 having even more gain than OD1 - in fact a staggering 20dB more! Thus giving the ability to switch from great clean to crunch and then to lead. Remember, the Clean channel not only does clean, it crunches up in a great traditional way too, just turn it up and drop the apparent output power (output master) down to a socially acceptable level.
ENGLISH 5. Overdrive Gain find the tone too thin with the gain control down either take some of the high end off with the treble control, or alternatively, bring the clean gain control up until you achieve the depth of tone you want and then control the volume of the amp with the ‘master volume’ control. This controls the amount of gain drive available for the overdrive channel, from mildly almost clean crunch to super-saturated overdrive, depending where this control is set, i.e.
✪ User Hint - When using the less gain / more volume approach, the tone controls can be used to help ‘push’ the power amp for a more refined tone. ENGLISH ✪ User Hint - As the (rear panel mounted) speaker emulated D.I. output is derived from this circuit you can balance the sound coming out of the loudspeaker from zero to full, whilst maintaining a constant level out of the D.I. output and enjoy the tonal qualities of a pushpull valve output stage - ideal for silent recording, direct to the desk.
ENGLISH 6. Loudspeaker Output Select (DSL401 Only) The DSL201 is fitted with a single loudspeaker socket preset at an impedance of 16 ohms, which is normally plugged into the internal 16 ohm 12” loudspeaker. To use an external loudspeaker, just unplug the internal speaker and plug into your external cabinet (this must be 16 ohms only), for instance, a Marshall 1960 4x12”. This switch selects the output impedance of the amplifier for either 8 or 16 ohm use, to match to alternate speaker systems.
4 DSL201 Front Panel CLN/OD TREBLE 4 6 GAIN 4 6 2 8 2 0 10 INPUT 1 MIDDLE 4 6 8 2 0 10 GAIN BASS 4 6 8 2 0 JCM 2000 - DSL 201 10 4 8 0 2 10 VOLUME 4 6 6 8 2 0 10 8 2 0 10 CLEAN 2 TREBLE 4 6 MIDDLE 4 6 8 2 0 10 BASS 4 0 10 FX MIX 4 6 6 8 2 8 0 D UAL S UPER L EAD REVERB 4 6 2 10 8 2 0 10 3 5 6 10 8 0 8 9 ON ON STANDBY POWER 11 12 10 MASTER 7 OFF VOLUME 4 6 8 2 0 OVERDRIVE OFF 10 DSL201 Rear Panel CAUTION!: Made in England by: Marshall Ampli
4 DSL401 Front Panel CLN/OD CLEAN TREBLE 4 6 GAIN 4 6 2 8 2 0 10 INPUT 1 MIDDLE 4 6 8 2 0 0 10 GAIN 6 4 8 0 JCM 2000 - DSL 401 OD2 BASS 4 8 2 10 OD1/OD2 OD1 2 10 VOLUME 4 6 6 8 2 0 10 MIDDLE 4 6 8 2 0 10 CLEAN 2 TREBLE 4 6 8 2 0 10 BASS 4 0 FX MIX 4 6 6 8 2 8 10 0 D UAL S UPER L EAD 2 10 REVERB 4 6 8 2 0 10 3 5 10 8 0 7 8 9 ON ON STANDBY POWER 11 12 10 MASTER 6 OFF VOLUME 4 6 8 2 0 OVERDRIVE OFF 10 DSL401 Rear Panel CAUTION!: Made in Eng
