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TH-18 build

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smitske96 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote smitske96 Quote  Post ReplyReply Direct Link To This Post Posted: 24 May 2017 at 3:01pm
Finally did some testing today! 

Music quality was not the best, but good enough for some impressions. I have to say I'm not satisfied yet, it was clearly missing something. 
My guess wood be the bad music quality and not a good summation at the crossover point with the B1520's.

Tops: Behringer B1520 (at the moment I don't have any mid/highs ;D)
Amps: 2X DAP TAS 2400 (one for each TH-18) and a different amp for the B1520 which I don't recall..
processing: Xilica XP3060

Music was just from my phone... so not the best.
Next time I'm hoping to get the mid/highs ready, and to do some measurements with SMAART.
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Brutus View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Brutus Quote  Post ReplyReply Direct Link To This Post Posted: 29 May 2017 at 3:10pm
hi smitske,

u are welcome to drop by, and smaart your baby :)
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Post Options Post Options   Thanks (0) Thanks(0)   Quote SouthwestCNC Quote  Post ReplyReply Direct Link To This Post Posted: 29 May 2017 at 3:45pm
Time alignment possibly? Found this to be an issue with the tham 12.
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smitske96 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote smitske96 Quote  Post ReplyReply Direct Link To This Post Posted: 29 May 2017 at 11:46pm
Originally posted by SouthwestCNC SouthwestCNC wrote:

Time alignment possibly? Found this to be an issue with the tham 12.

That was my first though also, but time being limited I couldn't get it right.
Now I am really hoping to have some time for the mid/high's. 
At the moment the "to-do-list" is VEEEEERRRRRYYY long LOL

Getting some training at time and phase alignment is on of them! This goal of the project is to have a nice sounding system, and I am also confident that can be doable. Ofcourse I have to learn lots of things, but that is never a bad thing!


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smitske96 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote smitske96 Quote  Post ReplyReply Direct Link To This Post Posted: 29 May 2017 at 11:48pm
Originally posted by Brutus Brutus wrote:

hi smitske,

u are welcome to drop by, and smaart your baby :)

Thanks for the offer! Smile I will remember it.
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smitske96 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote smitske96 Quote  Post ReplyReply Direct Link To This Post Posted: 03 September 2017 at 7:48pm
The cabinets are almost done (but are already in use). In the future the plan is for some other grilles (TH-18's also). The bottom bolts will be replaced with black ones.





Hopefully I have time to get started with the measuring part, but that will take some time.
I am also started with the next project (something like the d&b c4 cabinets).
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smitske96 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote smitske96 Quote  Post ReplyReply Direct Link To This Post Posted: 06 September 2017 at 7:57pm
Did some measuring today, and for the first time it's not to bad.


12NW76:
1200 Hz, 12dB/Oct butterworth
0,500 ms delay (was a guess)

DE800
1200 Hz, 12dB/Oct butterworth

Under 300 Hz it's really bumpy, but is very dependent of the position in the room

And another pic with the phase response.

measurements took place in a small room, so the plots are not fantastic.

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Teunos View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Teunos Quote  Post ReplyReply Direct Link To This Post Posted: 07 September 2017 at 10:10am
Originally posted by smitske96 smitske96 wrote:

Under 300 Hz it's really bumpy, but is very dependent of the position in the room. measurements took place in a small room, so the plots are not fantastic

Measurement looks totally unreliable. If you do measure in a small room, measure the speaker up close and on the ground, with mic on the ground as well. You canthen eq it reasonably flat and then measure further away above the ground. Average a few "further away" positions and then apply ONLY a low shelve to compensate for the difference in radiation area (half space vs full space). If you need to eq more, there a big chance you are trying to eq either room modes or reflections.

But of course its always best to measure outside.
Best regards,
Teun.

,,Diamonds are forever''
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Post Options Post Options   Thanks (0) Thanks(0)   Quote gen0me Quote  Post ReplyReply Direct Link To This Post Posted: 07 September 2017 at 10:58am
What speakers are inside TH?

I would love to hear demo. Just not from the room
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smitske96 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote smitske96 Quote  Post ReplyReply Direct Link To This Post Posted: 07 September 2017 at 11:36am
Maybe I have some time to do outside measurements today. 

@gen0me

TH-18's are loaded with the 18SW115-8 and later on with the 4 Ohm version (because there is a QSC PL380 on the way Smile). Tops are loaded with; B&C 12NW76 and the DE800 on a ME90 horn. 

For now the mid/highs are run by two DAP TAS 2400 amps with a XP3060 for the processing.

And SMAART training is in the agenda (October).
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Post Options Post Options   Thanks (0) Thanks(0)   Quote gen0me Quote  Post ReplyReply Direct Link To This Post Posted: 07 September 2017 at 12:12pm
Seems like very solid setup
12NW76 is closed or br?
Check out the hf horn placement.

Edited by gen0me - 07 September 2017 at 12:15pm
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smitske96 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote smitske96 Quote  Post ReplyReply Direct Link To This Post Posted: 07 September 2017 at 1:49pm
Br port is in the back
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