Erwin's 550 Liter LLT / 13 Hz / Maelstrm 18" - Page 3 - Home Theater Forum and Systems - HomeTheaterShack.com

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post #21 of 77 Old 01-14-11, 04:47 AM Thread Starter
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Re: Erwin's 550 Liter LLT / 13 Hz / Maelström 18"

I e-mailed Troels Gravesen to ask which way to go for the Center speaker. He sent me a design for a smallish MTM design he is developing, using the same JA8008 midwoofer (x2) and the 034 tweeter. I made some remarks about it and he sent me a sketch of what a bigger center speaker might look like. He is prepared, against payback of his hours and material, to develop this for me. Seems only fair to me, and certainly don't have the skills to do it myself. My budget was €10,000 for the 10 or 11 (B&W) main speakers and we will stay far below that amount if I don't count my own labouring hours.

Think I will start the build of the first pair of 2-way TQWT sooner than later. To get the hang of it and to audition the result...

Troels gave permission to show his sketch without comment.

-8008-2510-center_v1.gif

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post #22 of 77 Old 01-16-11, 05:11 PM Thread Starter
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Re: Erwin's 550 Liter LLT / 13 Hz / Maelström 18"

I just ordered:
a/ The kit for the first pair of speakers, the TQWT
b/ A 2 x 80 Watt Class-A poweramp, something I always was curious about the sound. 80 Watt is absolutely enough since the TQWT designs are 95 dB sensitivity.

Now I started to doubt about the Height speakers. Maybe, instead of B&W CCM7.5 in-ceilings, it would be better to ensure timbre matching to use the same drivers as the rest for a bookshelf type. I could angle the shape to face the listener (22° vertical angle). Horizontal angle would be 35° off-axis.
The in-ceilings would have been @ 28° vertical (45° reccomended) and 45° horizontal (as reccomended).
Any suggestions?

BTW, to get the vertical angle perfect, the ceiling would have to be some 3m60 (12') minimum! Duh!

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post #23 of 77 Old 01-20-11, 08:25 AM Thread Starter
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Re: Erwin's 550 Liter LLT / 13 Hz / Maelström 18"

I asked Audyssey about the in-ceilings and Kris preferred the in-ceilings with their better positions over the bookshelved version with identical drivers but poorer positions.

I was looking for info on AT screen and I found this info on Seymoor AV:

You can place the speakers up to approximately two inches from the screen surface, as long as you don't have ports with high velocity airflow. The deeper the bass that the speakers behind the screen are reproducing, the more you space you should give between them and the screen. You can place a subwoofer behind the screen as long as it is spaced at least 12 inches away and no ports are directed at the screen.

Boy, my SW were way closer, but I did another redesign with AT screen. If I do this, the LCR wil have to be customized (size and x-over) to fit behind the screen and behave as intended.

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post #24 of 77 Old 01-22-11, 08:20 AM Thread Starter
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Re: Erwin's 550 Liter LLT / 13 Hz / Maelström 18"

Cabinets sort of finished except the woofers and another layer of black OSMO oil.

-dscn1383.jpg

-dscn1382.jpg

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post #25 of 77 Old 01-22-11, 08:28 AM Thread Starter
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Re: Erwin's 550 Liter LLT / 13 Hz / Maelström 18"

Latest floorplan #6 and a cut to show the screen and the set, along with some details for acoustic treatments. As always, beneficial suggestions are welcomed.

Ronse2010B_HTacoustic.pdf

Ronse2010B_HTplan6.pdf

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post #26 of 77 Old 01-22-11, 09:18 PM
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Re: Erwin's 550 Liter LLT / 13 Hz / Maelström 18"

Wow. You certainly have gone to a lot of effort there.
Nice work....

Silence is golden but duct tape is silver.

DIY completed:

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post #27 of 77 Old 01-23-11, 11:04 AM Thread Starter
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Re: Erwin's 550 Liter LLT / 13 Hz / Maelström 18"

Quote:
robbo266317 wrote: View Post
Wow. You certainly have gone to a lot of effort there.
Nice work....
Thanks... It's a never ending effort, at least for the next few years!

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post #28 of 77 Old 01-26-11, 11:00 AM
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Re: Erwin's 550 Liter LLT / 13 Hz / Maelström 18"

Erwin, what a project! I can't wait to see the finished room, and the rest of the house while we're at it! The subs look incredible, and since I have been reading a lot lately about 9.1 and 11.1 setups, I'm really eager to see how you implement it, and what you think when you're done.

- OJ -

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post #29 of 77 Old 01-26-11, 01:03 PM Thread Starter
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Re: Erwin's 550 Liter LLT / 13 Hz / Maelström 18"

Quote:
Owen Bartley wrote: View Post
Erwin, what a project! I can't wait to see the finished room, and the rest of the house while we're at it! The subs look incredible, and since I have been reading a lot lately about 9.1 and 11.1 setups, I'm really eager to see how you implement it, and what you think when you're done.
I will sure post when the room is progressing or finished, but it's almost all DIY, so it will take time!

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post #30 of 77 Old 01-26-11, 01:16 PM Thread Starter
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Re: Erwin's 550 Liter LLT / 13 Hz / Maelström 18"

Here's a possible design for a center behind an acoustic transparent screen. But I need to discuss it with TG, so in the end it will certainly be different. The earlier alternative center below a non-AT screen is also still considered.

Ronse2010B_HTcustomCenter.pdf

The first Jantzen two-speaker kit arrived today for the TQWT 2-way design from Troels. Need to start building those cabinets to serve as Back Surrounds. Something simple to get the hang of it.

And received a package from Hong Kong containing one Jungson DURO class A stereo poweramp. $777 including shipping, but not duties and VAT. I want to compare the sound vs the Emotiva XPA-1. If there's not much audible improvement, the Jungson will go to my wife's office in the new house. Otherwise, it will power the very efficient L+R.

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