My guess would be that it accepts either line level or speaker level inputs. Maybe only in RCA format though...so you would just have to solder RCA ends onto the rear speaker leads if you wanted to use those for inputs.
Here is what is confusing me. Here are the specs for this amp. Notice in the first specs it says High and low RCA Inputs at the press of a button. and below it says Speaker Level Inputs No . So is the high level RCA inputs speaker level inputs in the RCA configuration?
Thanks
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PRODUCT SPECIFACIONS
Remote bass control with 20ft. wire
2 ohms stereo stable, 4 ohms momo
2-channel bridgeable power amplifier
High and low RCA inputs available by the switch of a button