Apsm 1500 multiples have to be strapped?

[ktraughb 10+ year member]

These amps have confused me. I can operate a pair just fine if strapped, but if I try to run each one at 1 ohm it seems there is no pass through from the first amp. Maybe my only choice is to use a y adapter? Never seen an amp that didn't have master/slave switches like these, and don't actually pass thru for multi amp operation. Any experience appreciated. These are new to me?

Click to read more...