Fixing The Echo Mona Preamp Gain Controls

The Echo Mona … is a fairly decent unit that had gotten good reviews when it first came out. I’ve been happy with mine except for one thing: The preamp gain controls are unreliable.

Fixing An Ampeg B25 Problem

By Sid of Stone Marmot
The Ampeg B25 is a great vacuum tube bass amplifier that was manufactured from the late 1960’s to the mid 1970’s. It also sounds quite good with guitar. It was conservatively rated at 55 Wrms, though many measure around 70 Wrms. It does have one subtle though potentially [...]