[Ixnay]

  Russell,

  The cabinet is not only braced exceptionally well, but the walls are about 1 1/4"+ thick. 3/4" MDF was used for the inner box and braces, with  I believe African mahogany for the outer box. I may or may not use a rod system that ties the driver to the rear of the cabinet for the ultimate support. That means that driver itself would become a brace of the cabinet.

 I just got done listening to the Synergy 'Chords" album, and now remember just how important an integrated bass line can bring the aspects of the music closer than without. The sound did have layers that I have heard before. It's just that I had forgotten how important this aspect of the music is! It sort of sounded like hype when saying that the rest of the music spectrum benefits when it can be presented as a whole. Now just how that happens when say lower octaves are clear, or the upper octaves are presented without hardness or harshness, I don't know. I didn't expect this much improvement just from getting the bass right.

[russellberg]

That sounds fantastic! I totally agree with you about the way a sub gives your mains room to breathe.  I had never owned a sub before building this one and it opened up whole new musical experiences.

[Ixnay]

  Russell,

  I have reviewed the posts in this thread and came up with 3 questions:

1) You mentioned early on that you were making a pair of speakers for this audio project right? Did you post photos of them somewhere on this site? I would be very curious as to what you came up with.

2) Where did you end up setting your subs crossover frequency, or are you doing it differently than that?

3) Well dam, I forgot the 3rd question.  It's bedtime anyway. Messed around in the shop for awhile tonight gluing on the top of my sub, and of course, that turned out to be more work than it should.

 More later, less sooner, Greg

[eichlerera1]

Absolutely awesome woodworking!
I would have used the Crossover/Control panel externally in it's own separate enclosure.

[russellberg]

  Russell,

  I have reviewed the posts in this thread and came up with 3 questions:

1) You mentioned early on that you were making a pair of speakers for this audio project right? Did you post photos of them somewhere on this site? I would be very curious as to what you came up with.

Here are the mains that I built at the time.  I am really happy with the sound of this pair.
https://www.audiocircle.com/index.php?topic=171283.msg1812536#msg1812536

I am also in the process of building these X-SLS Encores.  I have kind of gone off the deep end.
https://www.audiocircle.com/index.php?topic=171848.msg1822141#msg1822141

2) Where did you end up setting your subs crossover frequency, or are you doing it differently than that?

Im not at home right now but I am pretty sure it is in the 80-100hz range.  I found that playing with the gain on the sub had the most impact on establishing a balanced sound.  I find that recordings are significantly different in the way that they handle bass and I sometimes have to adjust even between songs.

3) Well dam, I forgot the 3rd question.  It's bedtime anyway. Messed around in the shop for awhile tonight gluing on the top of my sub, and of course, that turned out to be more work than it should.

 More later, less sooner, Greg

[Ixnay]

  I am old. I am sore. I am done with the servo bass project. Now the humor begins as I turn on the system and realize that one channel in my preamp (still in project phase itself) is weak. Or, or, maybe it's the recently repaired CD player. Or could it be the power amp that just came back from the lab? Too tired to care

   I must bring one thing up though. As I was looking for a good polyurethane finish, I spotted a product that goes on pretty thick, is water based, and is sold by Varithane. I bite, and put on the cabinet after a thorough sanding. Might be a love hate relationship here. Has a soft look to it, and the grain doesn't stand out as well. It does go on easy and dry quick, so there is that. What experience or opinion do you guys have with this type of finish?