An in-wall FAST that really rocks - Page 3

KyleinCowichan · 15th December 2012, 11:19 PM

Quote:

Originally Posted by planet10

A7.3 + 2xSDX7 in the prep for manufacture stage. And µBlade.

Oh, is this something I haven't seen? It's got to be a winner with that combo!

Kyle

tuxedocivic · 16th December 2012, 12:28 AM

Quote:

Originally Posted by xrk971

Subwoofer assisted? That's cheating. Not fullrange anymore.

How's about Fullrange Assisted Tweeter Technology FATT? Somehow folks would definitely not call that fullrange anymore.

Not cheating at all

its a 2-way that I posted in the full range forum

If you want some advice on FASTs I'd be happy to share what I've learned building 2. One was passive and one now active. This one I like more. I can show some measurements to if you'd like.

Personally I think FASTs are really about the best way to do a 2-way. The cross over is unobjectionable, the bass is real unlike little 6" MTs we see so many of, and generally inexpensive. The only faults are treble breakup (this one has some) and treble beaming (this one has none).

tuxedocivic · 16th December 2012, 12:34 AM

Quote:

Originally Posted by KyleinCowichan

Understood. You mentioned an optically transparent screen, do you mean a projection screen??

KM

Yes, a projector screen. Acoustically transparent. I DIY'ed that to.

planet10 · 16th December 2012, 12:50 AM

Quote:

Originally Posted by tuxedocivic

Not cheating at all

its a 2-way that I posted in the full range forum

They are considered as part of the FR genre.

Given that no single driver is FR to get a FR system you have to have help at one end or the other. And these almost invariably have a FR driver in them... something you can enjoy all by itself.

dave

markus76 · 16th December 2012, 07:54 PM

Quote:

Originally Posted by tuxedocivic

I can show some measurements to if you'd like.

I'm interested.

tuxedocivic · 03:47 PM

I don't have detailed measurements on this computer, but here is the simulation I ended up on. I haven't confirmed it worked yet. Hopefully over the Christmas break I'll get a chance to do more measuring of various projects, and I can confirm the model worked.

You can see in the transfer function that I have done any eq. Only level adjustment, and filters. Filters were 4th order each. Steeper than a lot of other FASTs. I nearly targeted 2nd order, and still might try that, but wanted to kill the woofer quick and save the little tang band from to much power. Plan to really run these hard. Already have

markus76 · 17th December 2012, 04:02 PM

Looking forward to your measurements.

You could also try a Allison-inspired boundary-coupled version: Mount the woofer at floor height. This should minimize adjacent-boundary effects.

cogitech · 04:51 PM

Quote:

Originally Posted by tuxedocivic

Waayyy better than expected. The tang band sounds really good for $9.99.

No doubt. I used the same ones to build my bedroom system and they sound way better than 9.99 should sound!

I don't push mine nearly as hard as you plan to, so I just give them the full feed from the amp and they can handle the bass like a champ too. Crossed at 300, I can imagine they will take quite a beating.

In case you haven't seen what I did with the Tang Bands: http://www.youtube.com/watch?v=mGiPnsFZAqM (that's just the 2 Tang Bands... no sub - the bass will only sound as good as what you listen to the video on, of course... listen on good speakers and the bass will shock you, I think.)

tuxedocivic · 17th December 2012, 05:24 PM

Quote:

Originally Posted by markus76

Looking forward to your measurements.

You could also try a Allison-inspired boundary-coupled version: Mount the woofer at floor height. This should minimize adjacent-boundary effects.

I thought of that, but then they'd be at foot level, and I have a 4 and 2 year old who play a lot in that area of our house. I doubt the woofers would last more than a week. They're safe behind the screen, and quite point source this way too.

KyleinCowichan · 17th December 2012, 05:52 PM

$9.99 is a hell of a steal! The plot supplied on the PE website looked extremely good. It'll be interesting to see your actual measurements. The 10-20k region looked above average for this size/cost of driver.

Screens and grills are a good idea for some adults too. I've had a few people just go and poke the drivers in a few of my builds!

Kyle

17th December 2012, 04:02 PM	#27
markus76 diyAudio Member Join Date: May 2008 Location: Switzerland	Looking forward to your measurements. You could also try a Allison-inspired boundary-coupled version: Mount the woofer at floor height. This should minimize adjacent-boundary effects. __________________ Markus

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17th December 2012, 05:52 PM	#30
KyleinCowichan diyAudio Member Join Date: Dec 2010 Location: Cowichan Bay, BC	$9.99 is a hell of a steal! The plot supplied on the PE website looked extremely good. It'll be interesting to see your actual measurements. The 10-20k region looked above average for this size/cost of driver. Screens and grills are a good idea for some adults too. I've had a few people just go and poke the drivers in a few of my builds! Kyle