Master Series Marshall Modification Two Dvd by Lee Jackson
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This is a completely new mod never show before, this mod does not require any drilling. and really makes a Big difference in the way the amp sounds both in gain and tone, Plus it covers complete servicing , Including power cap replacement and more! It also covers Testing, Biasing and Final Setup. Along with Sample Tone Settings. These Modifications create More Low End, More Gain Better Tone, Less Noise, and Smoother Distortion.
It allows you to Control your Sound from your Guitar.

Dvd comes complete with schematics.
The Models that are covered are:

Marshall Plexi Heads, Four input JMP's, And Early JCM 800's including Master Volume versions.

Lee Jackson and Metaltronix are Registered Trademarks of Lee Jackson 1983-2011
Hand Made In the USA
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Trademarks: All terms mentioned in this Video that are known to be trademarks and/or brand names are listed below. Lee Jackson is not affiliated or a manufacturer of any of these products. Acoustical Manufacturing Co, Ampeg, Bedrock, Bell Lab’s, Boss, Celestion, Crate, Fender, General Electric, Gibson, Groove Tubes, Hiwatt, International Music Corporation, Laney, Marshall, Mesa Boogie, Musicman, Neutrick, Orange, Peavey, Pignose, Roland, Seymore Duncan, Sears Silvertone, Soldano, Sound City, Sovtek, Standel, Traynor, Vox, Yamaha

Here is Stuff to help you set up your own Test bench

Bench Variac Test Station

Free Download Here

Bench Speaker Load

Free Download Here

General Tube Schematic

Free Download Here

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Watch a Short Demo of the Service Video's
Video Chapters
Every Video Has Quick Chapter Selection, So you can jump to the section you want to work on.