User manual MARSHALL JMD 1

[. . . ] Owners Manual Overview The Marshall R&D team have always kept a keen eye (and of course their ears) on new technologies, and have implemented them when they were right for the product. Our number one rule - never sacrifice tone for technology's sake. Only now have all the components, state-of-the-art technology and nearly 50 years of experience come together to create this exciting amplifier range. The JMD:1 is the result of a unique collaboration with our friends at SoftubeTM, leading to a true digital pre-amp, integrated into a product that I am proud to see the Marshall name on. [. . . ] The well rounded and warm tone of this particular pre-amp makes it ideal for jazz style playing. Pre-amp Topology: A linear pre-amp combined with a studio style EQ section, low-shelf at 100Hz, mid-peak at 500Hz, high-shelf at 3. 5Khz. Uncoloured preamplification followed by a three band cutting EQ, where a totally flat response pre-amp gain is achieved when Bass, Middle and Treble are set on full. Vintage Pre-Amp: 1974 & 1959 combination CRUNCH SECTION 5-8 A unique marriage of the 1974 and 1959 models, two of Marshall's most revered vintage amplifiers. The tonal character of the 1974 has been matched perfectly with the 1959's EQ section and is ideal for classic rhythm sounds. + Remember: When a channel preset is recalled, the physical position of the pre-amp and FX section controls are unlikely to match the original settings used to program the recalled preset. To Store - Dial in the tone and FX settings you require, when happy, select which channel to store your sound into by holding that channel switch down for more than 1 second. All channel lights will flash to indicate your settings have been successfully stored. Based on the mighty JVM Series' Clean channel, this pre-amp option produces one of the brightest clean tones ever to have come from a Marshall. The tight, controlled and well balanced tone provides plenty of clarity and punch, thanks to a tone network that lies before the channel's main gain stage. Pre-amp Topology: Single ECC83 pre-amplifier stage driving a classic Marshall three band EQ feeding another ECC83 gain stage directly coupled to an ECC83 cathode follower 4 The first of the JMD:1's new sounds, this setting is designed to produce a totally flat response, letting the natural tone of your guitar and the JMD:1's power Clean 4. Natural Pre-Amp: JMD:1 Pre-amp Topology: ECC83 pre-amplifier stage followed by a tone shaping circuit with tuned bass and a slight low mid cut feeding into an ECC83 gain stage followed by a three band EQ. Straight out of the JMP-1 tonal vault comes this well rounded tone with distinctive mid characteristics, making this option ideal for rich chords and softer tones. Increasing the gain results in clean lead lines with a hint of vintage style distortion. Pre-amp Topology: This pre-amp is the combination of a 1974 pre-amp and power amp used as a pre-amp stage: ECC83 pre-amplifier stage with preset tone and gain control feeding another ECC83 gain stage directly coupled to an ECC83 cathode follower driving a classic Marshall three band EQ followed by an 18 Watt EL84 push pull amplifier with no feedback driving a dummy load. Classic Pre-Amp: JCM800 2203 5 Raw, rough and ready ­ what more would you expect from a pre-amp based on the legendary JCM800 2203!An upfront focussed sound which embodies the term `crunch'. JMD:1 Front Panel continued 2 5 2 7 8 Ext FX ENGLISH Full - 8 Deep - 7 Classic - 6 Vintage - 5 Natural - 4 Classic - 3 Full - 2 Classic 9 10 - Modern 11 - Deep 1 12 - Detuned 13 - Deep 14 1 - Solid 15 - Classic 1 Modern 16 - Modern Mod 3-6. . 1 3 4 OVERDRIVE SECTION 9-12 5 6 9 10 Pre-amp Topology: ECC83 pre-amplifier stage feeding into a gain control with treble boost followed by an ECC83 pre-amplifier clipping stage then into an ECC83 gain stage directly coupled to an ECC83 cathode follower, then to a classic Marshall three band EQ. Crunch 7. Deep Pre-Amp: Haze40 Settings: Normal Channel, Boost and Bright switches engaged. A satisfyingly warm tone resembling the Marshall Haze40 with both its Boost and Bright switches engaged. Produces a darker overdrive with a smooth edge and enhanced bottom-end clout. The JMD:1's forefather, the JMP-1 provides the tonal backbone to this pre-amp option, which is based on the latter's OD2 channel. This setting delivers an aggressive and focussed sound, yet remains smooth and fluid with distinctive mids. Overdrive 9. Classic Pre-Amp: JMP-1 Settings: OD2 Pre-amp Topology: The signal is fed into a distortion / booster circuit then into an ECC83 pre-amplifier stage followed by an ECC83 gain stage driving a three band EQ. Modern Pre-Amp: JVM410H Settings: Crunch Channel in Red Mode Pre-amp Topology: ECC83 pre-amplifier stage with a slight mid boost feeding into an ECC83 gain stage directly coupled to an ECC83 cathode follower, then to a classic Marshall three band EQ. Detuned Pre-Amp: Mode Four Settings: OD2 Channel ­ Scoop on with Tone Matrix set to 3 Pre-amp Topology: A boost pedal driving a custom filter plugged into an ECC83 pre-amplifier stage followed by a treble boosting tone shaping circuitry and the gain control feeding into an ECC83 configured as a clipper, then into an ECC83 gain stage directly coupled to a cathode follower driving a classic Marshall three band EQ. Another fantastic tonal experiment, bringing together the raw might of the JCM800 2203 and Bluesbreaker FX pedal set to Boost. A custom filter enhances the bass and reduces the mids, with the blend of '80s roar and '70s bottom-end delivering hot-rodded scooped tones as they should be. Lead 13. Deep Pre-Amp: Bluesbreaker II + Haze40 Settings: Bluesbreaker II in Boost mode with Drive set to max, plus Haze Normal Channel with Boost and Bright switches on. LEAD SECTION 13-16 A 'boosted' Bluesbreaker pedal and a Haze40 combo with Boost and Bright switches engaged have been combined to produce a truly deep and growling tone. [. . . ] Using the Footcontroller, select the bank you require and then press the chosen preset. The Footswitch / MIDI Program switch will stop flashing and your settings will have been stored. To exit this mode without storing a preset, press the Footswitch / MIDI Program switch again. MIDI The JMD:1 can store and recall 128 presets via program change commands received from its MIDI IN socket. To Store - Dial in the tone you require, when happy, press the Footswitch / MIDI Program switch twice, the LED will flash until a valid MIDI program change command is received. [. . . ]