I wrote to Acoustic Image last night with some questions about the second-hand Clarus I bought. Got a response this morning with great answers! I thought this might be informative for other Clarus owners.... My questions: 1) Is warranty available for second-hand clarus amps? response: We will honor your warranty 2) Have you tried running your amps in places with poor wiring? I'm not gigging currently, but when I do I frequently play in pretty funky places. I've heard of people having problems with switching power amps (stewart, walter woods, qsc powerlight) in rooms where the line voltage is low (like 100 volts). In some cases if the line voltage is weak enough, the amp will not turn on at all. Do you know if the Clarus is susceptible to these issues? response: The Clarus has a linear power supply, it's the power amp that is a switching type. It will operate down to 95V but it may be pretty funky below 100V. 3) The DI is pretty nice. I'd like to occasionally run it in the studio without driving a cabinet. Is it safe to run the Clarus with no cabinet, as long as I "make sure the AC power is off before connecting or disconnecting speakers"? response: You can run the Clarus without a load if you turn the master level all the way off when operating it that way. The master level control does not affect the direct out.