User manual MARSHALL MODEFOUR MF350

[. . . ] MODEFOUR MF350 OWNERS MANUAL ENGLISH From Jim Marshall I would like to personally thank you for selecting one of my new MF350, 350 Watt, MODE FOUR amplifier heads. The very first Marshall amplifier, the JTM45, was built in 1962 as a direct result of my listening to the requests of the guitarists who frequented my music shop at that time. Forty years later, we are still listening to the thoughts and wishes of guitar players from all walks of life. The amplifier you have just acquired is, once again, the direct result of us paying attention to feedback from guitarists, coupled with the latest innovations in amplifier technology from my Research and Development team. [. . . ] REVERB Control This controls the level of the MODE FOUR's specially designed, built-in, digital Reverb for AMP 2. 15. SOLO LEVEL Control This control allows you to select a volume boost on all four modes when the BOOST switch is engaged on the included footcontroller. The SOLO LEVEL control will, when switched on, cause a volume increase of up to 6dB (i. e. MIDDLE Control This control adjusts the level of the allimportant mid-range in your sound once AMP 2's mid-frequency has been selected with the TONE MATRIX switch (18). Turning this control up will make your guitar sound fatter and fuller. Conversely, turning it down will reduce the mids in your sound, giving you an aggressive `scooped' tone. 28. POWER Switch This is the On/Off switch for the mains power to the amplifier. Please ensure the amplifier is switched off and unplugged from the mains electricity supply before being moved. IMPORTANT NOTE: As is the case with an all-valve amplifier, there will be no signal heard until the amp's ECC83 pre-amp valves warmup and start to pass signal. MASTER Volume Control The MASTER Volume control determines the overall volume of your amplifier. We suggest you use the AMP 1 and AMP 2 Volume Controls ((6) and (19), respectively) to set the relative volume of the two amps and then use the MASTER to adjust the overall output of your MODE FOUR. 23. SCOOP Switch This control is voiced differently to the SCOOP switch on AMP 1 and has been meticulously fine-tuned to work with the sonic characteristics of AMP 2, reconfiguring the entire post-EQ voicing to give you the most uncompromising and brutal `scoop' sound. AMP 2 CONTROLS 17. GAIN Control This GAIN Control is shared by AMP 2's two selectable modes, OD1 & OD2. At low gain settings the valve generated overdrive will be dynamic and punchy. Increasing the GAIN Control will make the sound thicker and the 24. FX LEVEL Control This controls the amount of external effect that is mixed in with the dry (uneffected) signal of AMP 2. Please refer to the FX Loop section (page 8) for further details. 6 7 MODE FOUR Rear Panel Features - see panel page 70 1. MAINS INPUT Your amp is provided with a detachable mains (power) lead that is connected here. The specific mains input voltage rating that your amplifier has been built for is clearly marked on the back panel. Before connecting for the first time, please ensure that your amplifier is compatible with your electricity supply. If you use the MODE FOUR with a load of less than 8 Ohms the LOAD PROTECTION CIRCUIT will become active, there will no longer be sound, and the LOAD PROTECTION CIRCUIT LED will light (please refer to the Cabinet Impedance Section page 10). ensures the most effective control of the effect level (via FX LEVEL Control 11 & 24) and that the tonal integrity of the amp's direct (dry) signal is unimpaired in any way by the processor. [. . . ] No damage would be caused connecting a single 16 Ohm cabinet to output II or connection of a single 8 Ohm cabinet to output I. However, the damping would be mismatched and this would have a negative effect on the sound. TONE TIP: Damping refers to the amount of feedback applied to the power amplifier of the MODE FOUR from the speakers. It is important the damping is correctly matched to the load impedance used for optimum sound. Troubleshooting Guide Before calling the service department, check the following: If the unit does not seem to operate properly, read the instructions again, then check the table below. [. . . ]