TH-18 Flat to 35hz! (Xoc1's design) - Page 129 - diyAudio
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Old 24th April 2013, 01:51 AM   #1281
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Fully active, horn loaded if you can afford the space. If not simple good components will do!
Midbass horns will be the largest, if they are straight horns.

I can't afford the space so I'm doing 2x15" BR midbass we, 8" sealed back midranges and 1" compression drivers. 4 way active.

Sub amp is class H and all 3 other amps are class AB

Last edited by m R g S r; 24th April 2013 at 01:55 AM.
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Old 1st May 2013, 11:50 PM   #1282
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I don't think I can really afford the space either (I'm guessing if I have to ask, then I probably don't). One of my worries is getting the 2, 3 and eventually 4+ pairs of tops to all integrate with each other nicely (no/very minimal phase issues, etc). So, I'm looking for a design concept that will have superb cohesion.

For some examples: I don't like those pockets of sound you get when some wedges are packed together and I don't want it to sound like the flanger is on when walking past the stack.
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Old 11th May 2013, 10:13 PM   #1283
sbjacob is offline sbjacob  United States
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Quote:
Originally Posted by CRESCENDO View Post
I don't think I can really afford the space either (I'm guessing if I have to ask, then I probably don't). One of my worries is getting the 2, 3 and eventually 4+ pairs of tops to all integrate with each other nicely (no/very minimal phase issues, etc). So, I'm looking for a design concept that will have superb cohesion.

For some examples: I don't like those pockets of sound you get when some wedges are packed together and I don't want it to sound like the flanger is on when walking past the stack.
Has anyone done a side by side comparison of the DIY TH118 and the Danley TH118?
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Old 11th May 2013, 10:16 PM   #1284
sbjacob is offline sbjacob  United States
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Has anyone done a side by side comparison with the DIY TH118 and the Danley TH118 ? I have a pair of Danley TH115's and was thinking to build a few of the TH118's ? Thanks
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Old 11th May 2013, 10:46 PM   #1285
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Quote:
Originally Posted by sbjacob View Post
Has anyone done a side by side comparison with the DIY TH118 and the Danley TH118 ? I have a pair of Danley TH115's and was thinking to build a few of the TH118's ? Thanks
No one has posted any such test on DIYaudio, but the XOC1TH18 is quite similar to the TH-115/TH-118 fold pattern and identical in size.
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Old 12th May 2013, 09:43 PM   #1286
wg_ski is offline wg_ski  United States
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Default Arauc-o-ply baby, in the tree top

When the jam breaks, the bass it will drop.

It's been a whirlwind 3 weeks building these TH18. I did a quick shootout against my old 40 Hz boxes to break in the new ones playing some Metallica before their first use. I was quite pleased with the results. Subjectivey, they seem every bit as sensitive and go a bit deeper than the front loaders they replace even though they model to the same 40 Hz in a quad. I was even more pleased Friday night. Really simple alignment - adjusted the delay to 8.5ms and actually took 3dB off the old setup. Cranked up the B&C's in the THs run STONE COLD, where the old boxes would get blazing hot on top and noticeably lose SPL over the course of 2 hours. Quite a bit more than equivalently-pushed labhorns, in fact.

Fortunately, I have some line arrays to build before I have to decide whether to build more of the same or look into bigger boxes using those same drivers.
They are really nice and easy to move around.
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Old 12th May 2013, 10:22 PM   #1287
Zero D is offline Zero D  United Kingdom
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@ wg_ski

Looking good & the wheels line up "quite" nicely inside the rear angle

Will you be posting any test graphs etc ?
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Old 12th May 2013, 10:49 PM   #1288
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How come the FLH's don't have mouth bracing?
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Old 12th May 2013, 10:50 PM   #1289
wg_ski is offline wg_ski  United States
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Eventually. I've got a bunch of honey-do's that need attention before I dare break out the omnimic in the back yard. It may even be a while before I get to bondo, sand and Duratex them. The old ones and the tops are still unpainted.
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Old 14th May 2013, 12:30 AM   #1290
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Sweet build! 4 more coming soon?

Btw what did you use for the driver displacement correction? What compression ratio? I know you said they don't heat up, but how do they sound when pushed?

It looks like the box you have constructed is almost identical to the DSL TH-118. Yours has more reflectors and more bracing than the DSL box however

Last edited by m R g S r; 14th May 2013 at 12:33 AM.
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