I scored this classic ICON the other day. It's brand new and has never seen power. it was in the original box from SSA with the stickers and brochure and the blue foam pads were still intact. I was told it was a D2 so I planned on wiring it in series and powering it with a US Acoustics 2300 at 4 ohms bridged. I hooked up the US Acoustics and it was screaming and then the fan kicked on immediately. I hooked up my DMM and found out the ICON is actually 1.5/1.6 ohms. So wiring in series results in 3.1 ohms and not 4 ohms. I just sold my US Amps USA-1000 so the only amp I have left that would be able to handle the new ohm load is an older US Amps USA-200. It's rated at 520W x 1 @ 2 ohms bridged. I know the older US Amps are underrated but do you think it'll be enough to push the ICON? I'm going to be putting it in a 1.1 cu/ft sealed enclosure. If it doesn't hit the lows like I think it should, I'll build a ported enclosure for it.