Marshall MA100H, MA50H, MA100C, MA50C OWNER’S MANUAL

From Jim Marshall
I would like to take this opportunity to personally congratulate you on choosing this MA amplifier from Marshall.
It has always been my aim to produce guitar amplification equipment that meets the needs and requirements of every guitarist, whether those needs be a UK made, all-valve professional head and speaker cabinet or a low cost, solid-state combo. As a musician myself, I know the importance of finding ‘your sound’ and understand how frustrating it can be when the only thing that stands in your way is not your talent, but your bank account. But how to cater for those budget conscious guitarists craving that true valve-driven Marshall sound? I put this question to the Marshall Research & Development team and their answer was the MA Series; a range of simple, road-worthy, all-valve amplifiers with an affordable price tag. This incredible range of dual channel amps has now made pure Marshall valve tone more accessible than ever, a fact I am very excited about.
Overview
The new Marshall MA Series comprises four models:
MA100H 100W head MA50H 50W head MA100C 100W 2 x 12" combo MA50C 50W 1 x 12" combo.
Designed, developed and quality controlled in the UK and manufactured in Vietnam by our selected OEM partner, the MA Series is a two channel valve amplifier with independent control sections. A ‘Boost’ function on the Overdrive channel creates a pseudo third ‘channel’ which translates to a very performance-friendly amplifier for today’s modern guitar player. ‘Resonance’ and ‘Presence’ controls allow for fine tuning of the amp’s tone at any volume level in any musical style, be it crystal clean, modern metal or anything in between.
The Basics
Mains Input & Fuse
Your amp is provided with a detachable mains (power) lead, which is connected on the rear panel. The specific mains input voltage rating that your amplifier has been manufactured for is indicated on the rear panel.
WARNING: Before going any further, make sure your amplifier is compatible with your electrical supply. If you have any doubt, please seek help from a qualified technician - your Marshall dealer can help you in this respect.
The MA Series also contains a spring reverb with front panel level control, a series FX loop and a two-way footswitch (PEDL-91001) that caters for remote channel change and boost engage, especially useful during live performance.
The preamp utilises three ECC83 (12AX7) double triodes with the trusty EL34 once again delivering the power into the speakers. The MA100H and MA50H units also feature transparent baffles and subtle internal lighting, allowing the chassis and valves to be viewed in all their glory.
The tone is full-bodied, hamonically rich and instantly recognisable as Marshall . . . enjoy!
The correct value of mains fuse is specified on the rear panel of the amplifier. NEVER attempt to bypass the fuse or fit one of the incorrect value.
ENGLISH
We have also worked extremely closely with our overseas manufacturer to ensure that the MA Series delivers exactly what you would expect from a Marshall; solid construction, proven reliability and, above all, great tone.
I would like to wish you every success with your new Marshall amplifier. Welcome to the family.
Yours Sincerely,
Dr Jim Marshall OBE
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Quick Start
1. Make sure that the speakers/cabinet(s) are connected
to the correct impedance LOUDSPEAKER jack(s) on the rear panel.
See the Speaker Output guides sections (22-23) in this handbook for specific information regarding impedance matching. When using an extension cabinet make sure that you are using a proper speaker cable. Never use a screened (shielded) guitar cable for this purpose.
WARNING! Failure to do any of the above may damage your amplifier.
2. Ensure that the VOLUME controls on the front panel are set to zero.
3. Connect the supplied mains (power) lead into the MAINS INPUT on the rear panel first and then into an electrical outlet.
4. Plug your guitar into the INPUT jack socket on the front panel.
5. Turn the front panel POWER switch on and then wait a couple of minutes.
6. After waiting, engage the STANDBY switch (see section 20 of Front Panel Features for full explanation).
7. Turn the volumes up to your preferred level and your amp is ready to play.
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