Friend of mine is on the look-out for some replacement 12" drivers for his old Jamo's. Can't remember the model number but they are not high-end, more like bass boxes! He did say they have a horn driver and a tweeter covered by an aluminum grill (which looks like an upside down CD rack!). Seen a pair of Jamo 12'' drives on ebay which I'm watching but if anyone has anything else suitable let me know ;)
