TRF SMD 1000.1D RMS 1X410 4ohm RMS 1X720 2ohm RMS 1X1300 1ohm TEST VOLTAGE % THD:14.4V-10%THD RMS 1X320 4ohm RMS 1X610 2ohm RMS 1X1100 1ohm TEST VOLTAGE & THD:12.6V-10%THD MAX 1X820 4ohm MAX 1X1440 2ohm MAX 1X2600 1ohm TOTAL 2600WMAX TEST VOLTAGE & THD:14.4V-1%THD