|Power Bias||fixed bias|
|Reverb||12AU7 and transformer|
|Tremolo||NE-2H bulb, 12DW7, 1869-D bulb.|
|Speaker RS12||2x 12"|
|Speaker RS15||2x 15"|
|List Price MP5||$440|
|List Price RS12||$220|
|List Price RS15||$308|
The MP5 and MP4 were "piggy-back" style amps of the Magnatone Pro Series. The design of the amplifier and cabinet (what are now called "heads" and "cabinets") was a direct attempt to compete with Fender with a physical design which is nearly identical to the Fender Bandmaster or Bassman.
Both the MP4 and MP5 have two channels. The MP4 is a bass head, each channel has volume, treble, and bass controls. The MP5 is a guitar head with volume, treble, and bass controls for each channel.
The MP5 is the "piggy-back" version of the MP3. The back lit control panel had a "dimmer" switch (right), as well as a NFB control switch labeled "normal" and "record". Each channel had a "Reverb" level control knob and master reverb "depth" and "tone" control knobs were to the right with a footswitch jack.
Special thanks to Fred Corradi for the great pictures of the MP-5 and RS-6. This might be one of the cleanest, most original examples of these amplifiers. The original D2 dolly and factory speaker extension cable are intact. This amplifier was found after being in storage since 1969. The original owner put into storage before entering military service. He became one of the 58,220 Americans who gave their lives for their country in the Vietnam War.