Audio/Visual Electronics - Underpower or Blowout speakers?????

I just installed 2 new Kenwood 120watt speaker in the front door few days ago and start noticing some rattling noise from the back speaker. I check for everything that rattles but couldn't find the problem. So I was thinking maybe the speaker under power or i have blown the speaker. Even when i turn the volume way the back speaker still rattle. Since I have a 200watt sony cassett player with 10 disc changer and just now 2 120 watter speaker i think it might be underpower, but also at the same i think i've might of blown the speaker because turn it up sometimes. Anyone know what the problem may be??? And does anyone know how to fix the problem??

In case you haven't noticed its a 94 EX with 2 Kennwood speaker in the front and two stock speaker in the back.

Definately sound like they are blown. If you have a home stereo, hook it up and see if they sound decent...

that is the way my back speakers in my 1995 200 SX were when I had that car. They are blown

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So I guess i'll have to replace them. Do you know what size the back speaker is??? What company do you recommend????

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