I had been recently using a 4ohm 12" Eminence car audio sub in a ported box with my Eden WT800. After a good 3 hours of solid thrashing I managed to blow the voice coil (found out later the speaker was rated at 200w). As the Eden puts out somewhere around 250w @ 8ohms (400w @ 4ohms), I can probably souce a cheaper 8ohm speaker than a 4ohm'er that can handle the amp. What's the main difference between using a 4 and an 8ohm speaker - volume or clarity? I'm a little surprised the Eminence died so easily - would I be pushing things with a replacement rated @ 300w (pushing 400w into it)? thanks!