I just received my B15 and have a 240V - 110V step down transformer on order so I haven't played it yet. I do have a couple of questions though. Did they originally have speaker wadding on the back wall of the cabinet? The picture shows what I think is the remants of it. I've got some lying around any general advice for replacing it? I have no idea what this is. I've emailed the seller but am still waiting for a response. He shipped it with the cabinet. Only half of the Ampeg logo on the front of the cabinet remains. Would heating it up to soften any glue be a good way of removing it? Or is it 'spiked' on the back? Interestingly it says B15NC on the inside of the cab but http://users.aol.com/bluemuse/portaflex.html lists the NC as a 2x15. Any ideas? Thanks for any help.