my dual 1 ohmer took a zrs-9000d at .5 for plenty of days //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif... still in tip top shape.. I just could never find a match //content.invisioncic.com/y282845/emoticons/frown.gif.a3531fa0534503350665a1e957861287.gifLooks beastly from a technical standpoint, but I wouldn't ever trust an SPL product. Flea market ish. Likely poorly built, glue will melt from 3 minutes at rated RMS power, etc. 4" coil and beastly motor don't mean nothing if it won't hold together!