Spring and/or digital reverb

The Music Thing Spring Reverb is a flexible, easy-to-build voltage controlled DIY mono spring reverb module. Traditional guitar reverbs are tuned to the sound of the guitar and the amplifier it is played through. This circuit is different; designed to be relatively clean and high-fi, with a lot of bass response. It can also be abused and driven into (externally patched) feedback.

The (optional, digital) Brick draws a considerable amount of current from +12V. measured at 75ma for the whole module

http://www.thonk.co.uk/shop/springreverbkit/

• 75 mA +12V
• ? mA -12V
• ? mA 5V
• 25 mm Depth

No info about availability.