When I first saw one of these, my response was "aaaaaah that's a BRILLIANT idea"; I had to have it. The idea is simple: plug your microphone in via XLR, then use the 1/4" jack FX loop to send your vocal/mic signal to any number of standard guitar/bass effects pedals and back again. Voilà! Now you can add all those fancy fuzz and chorus pedals you've got to your vocal signal. It's got a wet and dry level control and a master gain control to get your signal exactly how you want it. The momentary switch allows you to kill all the FX in the loop while you hold it, so you can address the audience between songs etc. There's 48v phantom on deck to power condenser mics too. This solves a lot of problems and creates a lot of possibilities.

Model: Cusack Music Pedal Cracker
Made: Holland MI, USA, recent model
New street price: $425 (hard to find)
Type: switching/control
Power: standard 9v negative supply, output 48v phantom power available
Switching: true bypass
Mods: velcro added
Accessories: none
Condition notes: used, no major marks, excellent condition