If the 4401's sound good...
Get some 4406's. I have had both. The 4406's are more extended top and bottom, and way more transparent. The 4406's I still have also have mylar caps bypassed with polyprope from the factory...the 4401's I had were equipped with electrolytics everywhere, even though they were older production:blink:....regardless, the 4406's just sound quite a bit smoother and detailed....and they are still cheap....I got a mint pair for $180.00 including shipping. I have seen them go for substantially less, but they aren't all that common on ebay anymore...I would keep both, though, if you can...the 4401's do have a noticeably punchier bass, because of the stiff paper/aquaplas cone. They also both look pretty cool in their own ways...one of the reasons I was always a sucker for JBL stuff....JBL got you all excited reading the color brochures for everything they made....they have to show you pics of the raw cast machined drivers, response graph's, etc....and then you have to have it....Rock on!