S.E.O.S.R. MEGA BUILD - Page 9

YMMV = your mileage may vary

As far as bracing getting in the way that kind of depends on the construction of the bracing and where it is relative to the speaker and listener. Ideally there is nothing between you and the speaker. It would not be good to place a 2x4 directly in the path between the speaker and listener. My corner speakers are slightly forward of the screen and angled. All you see are large black speaker cloth panels that are angled. Just to the inside of each horn is my screen wall framing. I've measured it with and without the screen wall and there is no difference.

It just depends on how you are able to build it. You are going to get reflections off of the screen wall either way. The key is that there is very little directly between the speaker and listeners. Home theaters are always somewhat compromised vs a dedicated music setup without a screen. The compromise can be made so small to not matter though.

Building an AT screen for my system was probably the very best upgrade I have ever done to making the HT experience at home better than your average set up. I would never not use an AT ever again from on.

+1

A-lens with 2.35 AT screen was my single biggest "theater like" improvement.

That sucks... Well just means you'll have to drink a bit more on St Patties day.

that really stinks man, I hope the Sentinels had nothing to do with the failure.

Chop
Any chance that you had that 4520 plugged into an external amp? Subwoofer or speaker?
Chris

That's really funky, sounds to me like the built in amps were fine and the failure was in the volume control board. I wonder how it worked fine then just dies all of a sudden like that.

I've had nightmares of equipment failure like that where the volume control stops working and it is stuck playing full volume. Except in my nightmares the power button and unplugging it don't stop it either.

Outstanding. Think they're fully broken in now?

Great news!


Man, could you imagine if that would have happened if you had the SEOSR's up and running.

Every home theater junkies worst nightmare! Not for the cost to fix it necessarily, but the wait to get it back. Cool that you have a spare!

ChopShop- Did you ever at one point consider going with the Radian 950PB's with perhaps Be diaphragms? I keep reading so much about how awesome the Radians sound compared to other CD's from the likes of B&C, Selenium, JBL and others. With that being said, I know that those BMS CD's you are using will also be top notch, but I can't help but wonder how the Radian 950PB would sound compared to your BMSs'.

I don't think anybody has compared the two, but with GB price, my rough math says the BMS coax is about 1/3 the price of the Radian with Truextent Be phragms. That makes it a pretty easy call IMO since they are both very well regarded and should both outperform titanium and aluminum diaphragms which are the only other choices in large format drivers.

I have the BA. Would Truextent be the one to go for a custom 1 inch Be diaphragm? Any others out there with the BA's who'd be interested in a GB for Be 'phragms?
Erich, do you have the exact specs/measurements to size a BE phragm for the BA?

I associate anything with "Be" as stupid expensive!

Back before this thread was made I had mentioned behind the scenes to Matt, Gorilla and Chop about using the TAD 4003 with the Be diaphram. It's a favorite of Klipsch Jubilee owners who are looking to upgrade their factory CD's.. I thought that would be awesome for Chop's super build...until I found out they run $3K+ each, IIRC.

$3000! Isn't the diaphragm just a little piece of metal? Certainly the diaphragm alone wouldn't be close to that expensive... I hope? On well...maybe I'll give them a call. Actually, the BA measures quite well but others have said that the coated titanium supposedly imparts a sound of its own. The measurements indicate that it will go both high and low enough to match up well to SEOS 18 and TD15M.

Truextant currently only offers 2 Be diaphragms... an 8ohm and 16ohm 4" diaphragm that is designed to be OEM level replacement for JBL CDs like 2446, 2447, etc. The Radian 950PB CD works with this model of phragm because it's phragms are interchangeable with those JBL parts.

They have talked about offering 1.75" VC replacement diaphragms (the next most common phragm size), but I'm not sure how far off those models are from reaching the population as finished product... given the BA's 2" diaphragm, I'm not sure how closely or not it complies to the JBL or radian standard... as such, it may be a while before they would offer a drop in replacement for this driver. The Truextant folks are looking for more commercial level interest to move units in volume... the perk for us DIYers is in us using CDs that allow their product offerings to work for us. They are not looking to do this on a small batch run kind of scale that I have seen in my conversations with them before I bought my own phragms...

I didn't get the full breakdown, but I'm assuming the bulk of the cost was the CD itself.

Let us know what they say, I've never had a chance to compare the cost difference between the diaphrams themselves. Still confident they are not cheap compared to their titanium counterparts.