amp help
 

I have the Sony CDX-3150UP deck and I m looking to replace the 4 factory speakers in my 2000 Toyota Corolla CE, but my deck only has 2 output terminals (Sub & Rear) and I have the sub terminal being used. I was just wondering would a 2 channel amp work if I double up the left connections on the left and the right on the right, The speakers I m looking at are 4-30 W RMS and 250W peak power (I don t know if this is necessary but my deck puts out 17 W RMS x 4 at 4, and the terminals put out 55 W RMS x 4 at 4 ohms)