If I remember correctly the amp only puts out 22W RMS, so 180W speakers (probably peak, so 90W) would require more power to remain constant. Not that its a huge deal (Im currently underpowering subs) but you may want to find something with less peak/RMS. Im picky with speakers and usually stick with Kicker, but you should check out Kenwood or MTX as well. Try to find a speaker to match the current amps output. Or buy componet speakers with amps all ready to go. Hopefully this helps.