Wanted to let everyone know that I installed a Bag End Infrasub 12 Pro yesterday.
I stayed up until 1:30 AM measuring and listening. Eventually my wife wandered in and told me to stop shaking the house and come to bed.
I didn't have a lot of options for placement in my production room, due to other racks, tables, and whatnot, so I put the sub at the foot of the Sound Anchor stand holding my front left ADAM S2A. A quick ETF scan showed that I needed the polarity switch in the "+" position. It also showed some other unflattering things about my room. That sharp notch at 120 Hz is still there -- too high for the subwoofer to have any effect. I'm pretty certain this is a ceiling reflection. I have some Sonex up at the bounce point, but it's no good at 120 Hz. There is also a big suckout at 55 Hz. I'd previously thought that was just the ADAM's rolling off, but it persists with the subwoofer. More investigation needed. Because of that big hole in the measured spectrum, it was a bit difficult to determine the correct level setting for the sub. So I played a lot of good recordings and dialed it in by ear.
Initial sonic impressions:
The low end extension on this thing is absolutely scary. Arvo Paart's De Profundis on SACD sounds truly menacing. The new LSO Shostakovich recordings are very impressive. Jazz acoustic bass sounds like it is right in the room. Irish bohdron still has the nice snap that it did on the unaugmented ADAM's, but a little more bottom. Then there's kick drum...
(I have to confess I've never had a monitor system that could do this before. It's not a requirement for the classical and acoustic stuff that I normally work on -- but it sure is fun! ) Michael McDonald's album of Motown covers is really a hoot. (Too bad the top end is so fizzy-- bad ProTools mojo comes through even on DVD-A.)
The sonic character of the ADAM S2A's seems to have been mostly preserved. My chamber music recordings sound pretty much like they did before. Of course that little bass bump due to the porting is gone -- the system has crossed over to the sub by then. Well, that's what was supposed to happen, but I find I'm missing it a bit, because I was relying on it to tell me how stuff would translate to consumer systems. Which brings me to what I think is the biggest deficiency in Bag End's product design: There's no switch for bypassing the thing.
I guess they figured folks would fall in love with it and want it on all the time. Nope; I still want to hear small-monitor-only a lot of the time. Right now that requires repatching, which is a real annoyance. I might have to build myself a relay box before I'm done.
David L. Rick
Seventh String Recording