I know the 4648 is a bass cabinet. I would be crossing over to the hf horn at 800 HZ. My point is that the dual woofer cabinet nets a good gain in system sensitivity which is a major plus when we're dealing with 3.5 watts. My concern is that that's a whole lot of speaker motor for a little triode to control. I know there's many of these 4648A enclosures around and wondered if anyone had tried running a pair of the 2226J's per channel rather than a single. Building up a dual 15" Pro Pi 4 in the Pialigned 3.9 cu. ft. enclosure would be one bad looking "little" cabinet, wouldn't it? That's where my system was at 1 year ago when I put all these 2226J woofers aside due to a gut feeling that they weren't going to sing with the set. Recent posts have indicated otherwise, at least in a single woofer cabinet. Who's got a 4648 with 16 ohm woofers and a Paramour? I think for some preliminary testing that might work. Perhaps one could tell pretty quickly if the amp "works" or if it rolls off everything and is "dynamically challenged". Hoping for some good feedback. Take care! Jerrod