Fostex "boiler plate" speakers - Page 5

turbodawg · 21st June 2012, 07:02 PM

WMTMW is a MTM (mid-tweeter-mid) with woofers above and below, then add stereo subs to that. Ends up as a 4 way system, which a 8x2 minidsp can handle.

If you're going to go with closed boxes, as opposed to horns or open baffle, I think they should be extra large and stuffed, as to act as close to infinite baffle as possible, basicly low Q. I also prefer a minimum baffle, aka Vandersteen.

Transient correct - look into Thele and Dunlavy designs......much easier to do these days with the dsp.

aeronautical · 21st June 2012, 08:58 PM

would this work if I already have a sound card in my laptop:

Behringer: XENYX 302USB

where I could plug the calibrated mic into this and this into my laptop via USB?

aeronautical · 21st June 2012, 09:50 PM

Turbodog,

Do you have any plans for such a layout as you described?

Pano · 22nd June 2012, 02:22 AM

I can't tell if the XENYX has phantom power or not. Do you know? If it does, it will be fine.

As for the WTMW, I've heard some nice ones, but can't help you at all there as I have no build or crossover experience (important!) with these. I keep it simple and classic.

aeronautical · 22nd June 2012, 03:16 AM

Hey Michael,

I looked on the Behringer site and it does have phantom mic power.

Check this out though: Check out these new horns - Very Impressive

That just looks classic to me...I could get excited about something like this. Maybe add a woofer and a tweeter and WOW. Is that not beautiful? What do you think, Sir?

talaerts · 22nd June 2012, 05:34 AM

> That just looks classic to me...I could get excited about something like this. Maybe add a woofer and a tweeter and WOW. Is that not beautiful? What do you think, Sir?

The comments are in doubt if that great looking kind of horn is the best approach compared to the current state of the art in horn design.

This could be interesting for your project:
Horns
(don't know the price)

turbodawg · 22nd June 2012, 02:27 PM

Quote:

Originally Posted by aeronautical

Turbodog,

Do you have any plans for such a layout as you described?

No plans created myself, but here's some light reading on various wmtmw or other 3 ways in no particular order...

Active high dynamics/SPL & high performance loudspeaker system for my living room…!
Ground Sound
High-end 3-way active Avalon look-alike
WATT puppy clones?
Dunlavy Audio Labs Signature SC-VI loudspeaker | Stereophile.com
DIY Audio 3-way reference project??

Transient correct / square wave reproduction:

Can't Reproduce a Square Wave.

Interesting, simple and cheap-ish waveguide/horn plus DSP project:

S15: Econowave DSP - a Constant Directivity vs Dipole study

turbodawg · 03:11 PM

Oh and just my personal point of view, from a non expert.....I like horns/waveguides and would consider using them in a design, but feel that they inherently lack "correct" dynamic/impulse response compared to a transient perfect design using cones/domes/ribons/planars and the correct crossovers. Especially the horn subs.

Open baffles are also very popular and I've built open baffle subs myself. While I see the appeal, I'm not too crazy about the back wave and the level of cancelations occuring, and inefficency. Why not infinite baffle, or more practically, an extra large enclosure (Qts < .5, or as practically near Qtc as possible) with lots of damping material, and 1st order high pass with the dsp?

turbodawg · 22nd June 2012, 03:15 PM

Sorry, meant: (Qtc < .5, or as practically near Qts as possible)

Pano · 22nd June 2012, 08:22 PM

Open Baffle very often isn't done right, but that's mostly because it's not well understood by many builders. It can be very good indeed, when done right.

22nd June 2012, 02:22 AM	#44
Pano diyAudio Moderator Join Date: Oct 2004 Location: North Carolina Blog Entries: 4	I can't tell if the XENYX has phantom power or not. Do you know? If it does, it will be fine. As for the WTMW, I've heard some nice ones, but can't help you at all there as I have no build or crossover experience (important!) with these. I keep it simple and classic. __________________ Take the Speaker Voltage Test!

22nd June 2012, 02:43 PM	#48
turbodawg diyAudio Member Join Date: Feb 2004	Oh and just my personal point of view, from a non expert.....I like horns/waveguides and would consider using them in a design, but feel that they inherently lack "correct" dynamic/impulse response compared to a transient perfect design using cones/domes/ribons/planars and the correct crossovers. Especially the horn subs. Open baffles are also very popular and I've built open baffle subs myself. While I see the appeal, I'm not too crazy about the back wave and the level of cancelations occuring, and inefficency. Why not infinite baffle, or more practically, an extra large enclosure (Qts < .5, or as practically near Qtc as possible) with lots of damping material, and 1st order high pass with the dsp? Last edited by turbodawg; 22nd June 2012 at 03:11 PM.

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21st June 2012, 07:02 PM	#41
turbodawg diyAudio Member Join Date: Feb 2004	WMTMW is a MTM (mid-tweeter-mid) with woofers above and below, then add stereo subs to that. Ends up as a 4 way system, which a 8x2 minidsp can handle. If you're going to go with closed boxes, as opposed to horns or open baffle, I think they should be extra large and stuffed, as to act as close to infinite baffle as possible, basicly low Q. I also prefer a minimum baffle, aka Vandersteen. Transient correct - look into Thele and Dunlavy designs......much easier to do these days with the dsp.

21st June 2012, 08:58 PM	#42
aeronautical diyAudio Member Join Date: May 2012 Location: Bryant, Arkansas	would this work if I already have a sound card in my laptop: Behringer: XENYX 302USB where I could plug the calibrated mic into this and this into my laptop via USB?

21st June 2012, 09:50 PM	#43
aeronautical diyAudio Member Join Date: May 2012 Location: Bryant, Arkansas	Turbodog, Do you have any plans for such a layout as you described?

22nd June 2012, 03:16 AM	#45
aeronautical diyAudio Member Join Date: May 2012 Location: Bryant, Arkansas	Hey Michael, I looked on the Behringer site and it does have phantom mic power. Check this out though: Check out these new horns - Very Impressive That just looks classic to me...I could get excited about something like this. Maybe add a woofer and a tweeter and WOW. Is that not beautiful? What do you think, Sir?

22nd June 2012, 05:34 AM	#46
talaerts diyAudio Member Join Date: Oct 2005	> That just looks classic to me...I could get excited about something like this. Maybe add a woofer and a tweeter and WOW. Is that not beautiful? What do you think, Sir? The comments are in doubt if that great looking kind of horn is the best approach compared to the current state of the art in horn design. This could be interesting for your project: Horns (don't know the price)

22nd June 2012, 03:15 PM	#49
turbodawg diyAudio Member Join Date: Feb 2004	Sorry, meant: (Qtc < .5, or as practically near Qts as possible)

22nd June 2012, 08:22 PM	#50
Pano diyAudio Moderator Join Date: Oct 2004 Location: North Carolina Blog Entries: 4	Open Baffle very often isn't done right, but that's mostly because it's not well understood by many builders. It can be very good indeed, when done right.