About a year ago I bought a Carvin LSx1503 when they were blowing them out on Ebay. No complaints at all; it's a great sounding cabinet, but last week I bought an Eminence 3015 for the popular woofer upgrade. I was very surprised to find that the stock woofer in the 8 ohm-rated cabinet was a 4 ohm Celestion. This has never been an issue for me, as I'm only running 1 cab and my amp is 2 ohms stable, anyway. I just wanted to warn everyone here to test their cabs with an ohm-meter before they try to run 2 of them with an amp rated for 4 ohms. I don't know if Carvin just threw in any old driver they had lying around for the Ebay blowout or if any cabs bought directly from them might have this driver-I just wanted everyone to be aware of the issue.