Eric, I live in SW Minneapolis/Edina and I have a Tannoy PS115 powered sub. It's not an HSU, but it's a great sub. Front loaded 15", dual 3" ports. It has a 110 watt amp in it and the 15" driver is 101db efficient, so 110 watts is more than enough. Slight rear cabinet damage, but nothing you'd notice. I also have a spare 15" driver for it that would need to be reconed. I paid almost 1K for it 4 years ago. I'd let it go for $475. Drop me a line if you're interested. Thanks