Used this with my Alessandro MS-1's for a year in Afghanistan. Now it sits in a drawer. Still sounds great but the internal 9V NMiH battery is dead, easily replaced. Uses two OPA227P opamps which can be 'rolled' since they are in sockets. Comes with power supply and has an internal recharging circuit for the battery. Asking $55 shipped (to lower 48) via paypal.
Thanks for looking.
Todd
