JBL Synthesis - Room Design and Treatment

[Titanium Dome]

In addition to sound, light is also a concern. Fortunately this room has no windows whatsoever, and the only doorway goes to another room. Since I decided not to put in a physical door, I installed two sets of drapes, both held back by ropes for access, then released to close for light control. With both sets closed, it is, as Vin Diesel might say, Pitch Black.

Heather will recognize those chairs.

EDIT: Yep, that's a 4" bass trap by the doorway. There's another one in the other back corner of the room.

[Allanvh5150]

Hi Ti,

Was there a reason for not recessing the T4A's?

Allan

[Titanium Dome]

Hi Ti,

Was there a reason for not recessing the T4A's?

Allan

Yes. I'm a dumb ass.

[Titanium Dome]

Yes. I'm a dumb ass.

Or check here:

http://audioheritage.org/vbulletin/s...&postcount=127

I don't want to have to re-drywall the room in a year.

Also, Chris told me early on that on-wall mounting the S4Ai units (I'm assuming that's what you're referring to as T4A?) was an option that even JBL Synthesis® has used on a number of occasions with great success. Since the S4Ai is his design, I believe him without hesitation.

So I'm very comfortable with it, especially in conjunction with following his directions on diffuser placement.

[Hoerninger]

I do but I can't tell you.

Sometimes there is a kick in the ass needed. And I thought Amazon would be the way ...
Thanx
____________
Peter

[Hoerninger]

This crude diagram, not drawn to scale, shows how the diffusers break up the sound before it hits a reflection point.

Tricky but simple. I have understood.

Fortunately this room has no windows whatsoever, ...

Acoustically it is a fortune. But is there some exchange of air even if there is no one in the room? Does it perform your Radon removal system, which is quite unusual here (at least in Schleswig Holstein - between the dikes)?
I speak from experience as we have a small room for clothing, it needed a hole to the first floor - air flow by temperature differences.

The efficiency of this 18" driver is insane: 97dB!:shock:

Unrestricted power, that's all.
____________
Peter

[Allanvh5150]

(I'm assuming that's what you're referring to as T4A?)

Yes, I too am a dumb ass.

Allan.

[Mike Ronesia]

Since I was snapping away, I got this shot for Mark (Mike Ronesia).

Thanks.

[hjames]

In addition to sound, light is also a concern. Fortunately this room has no windows whatsoever, and the only doorway goes to another room. Since I decided not to put in a physical door, I installed two sets of drapes, both held back by ropes for access, then released to close for light control. With both sets closed, it is, as Vin Diesel might say, Pitch Black.

Heather will recognize those chairs.

Yes, but we now have the extremely rare Poang Table between our chairs ...

[Titanium Dome]

But is there some exchange of air even if there is no one in the room? Does it perform your Radon removal system, which is quite unusual here (at least in Schleswig Holstein - between the dikes)?
I speak from experience as we have a small room for clothing, it needed a hole to the first floor - air flow by temperature differences.
____________
Peter

The Radon removal system is actually under the concrete floor, so it draws the Radon out of the soil as it rises. Since most of this room is also underground on three sides, the temperature is moderated quite a bit, and it's on the north and east side of the house. It's rarely warmer than 75 degrees F or cooler that 68 degrees F. For those extra cool winter nights, a small space heater is more than enough to warm the room.

There is positive air flow into the room on a constant basis, though at a very low volume, and it exits via the doorway.

The Synthesis® amps are probably going to change the equation as they will add some heat to the room, though so far they've never even gotten warm.

[Mike Ronesia]

Since most of this room is also underground on three sides, the temperature is moderated quite a bit, and it's on the north and east side of the house. It's rarely warmer than 75 degrees F or cooler that 68 degrees F.

That's some serious sweater weather.

[Mike Ronesia]

Yes, but we now have the extremely rare Poang Table between our chairs ...

Chairs are cool and I like the table but the wood phone is just toooo much.

[hjames]

Chairs are cool and I like the table but the wood phone is just toooo much.

Nooo - too much is just right!
Stock Western electric parts - so, who could resist it for $25 shipped!

[MLKstudios]

Patiently awaiting the results of your calibration "party". Interested if more treatments were necessary, what Chris used to calibrate with and what adjustments were made.

Something silly, but I really enjoy on my system, are the THX DVD's that have their "trailers" on them. They really show off a good sound system.

TURN IT UP!

[nlsteele]

Don't forget, he may also post in the calibration specific thread over here:

http://audioheritage.org/vbulletin/s...d.php?p=255439