Can I connect a CD player or similar source to a KC-series amplifier? If so, will the sound be reproduced with an uncolored (flat) response?

What type of subwoofer is suitable for use with the KC-series amps?

The KC-series amps are equipped with both phone and XLR jacks on the CH 1 input. Can I use both of these input jacks simultaneously?

Can I use a KC-series amp to amplify an electronic percussion instrument (such as Roland's V-Drums) without damaging the amp's speaker?