Mattoverse Echo Amp warble swell echo mkii Turning the crank clockwise will

Turning the crank clockwise will also illuminate the light on top

please be aware they often seem to have scrapes

I built this because I really dig the sound of the Bad Passenger into the Just A Phase and having the Warble Swell Echo at the end takes it to a peak level of PsychRock

to light overdrive

Mattoverse Echo Amp warble swell echo mkii Turning the crank clockwise willThis is from my personal collection, not sure on the # but less than 15 20 of these were made I believe. The Echo Amp is a small standalone audio amplifier with a built in speaker that consists of a preamp into a simple echo circuit into an op amp gain circuit with the output fed into a small Class D power amp. Overall it is a bit noisier than I was aiming for and the wood enclosure versions can vibrate too much at certain frequencies. Not a ton of