Re: Blown amp?
No, they would still only get 17watts RMS each. You could purchase a 4-channel amp or just upgrade to a H/U that has front, rear, and sub outputs with selectable x-over frequencies. Most new H/U'swith these features have 20 - 22watts RMS/channel output and start at about $150.00. I personally like Alpine and Pioneer.
"Acoustics is the study of sound; a branch of physics dealing with sound. The law of physics is constantly challenge. Therefore in relation to acoustics; You must study constantly, for you will be constantly challenged." ...... Rainmanspl