Official JTR speaker thread - Page 640 - AVS Forum | Home Theater Discussions And Reviews
Baselworld is only a few weeks away. Getting the latest news is easy, Click Here for info on how to join the Watchuseek.com newsletter list. Follow our team for updates featuring event coverage, new product unveilings, watch industry news & more!



Forum Jump: 
 6952Likes
 
Thread Tools
Old 05-04-2014, 12:57 PM
Senior Member
 
kma100's Avatar
 
Join Date: Nov 2010
Location: Hoboken
Posts: 269
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 17 Post(s)
Liked: 16
So is a baffle wall speaker the same as an in-wall, i.e. front of the speaker flush with the wall?
kma100 is offline  
Sponsored Links
Advertisement
 
Old 05-04-2014, 01:05 PM
AVS Club Gold
 
craig john's Avatar
 
Join Date: Oct 2003
Location: Lancaster, PA
Posts: 10,930
Mentioned: 33 Post(s)
Tagged: 0 Thread(s)
Quoted: 510 Post(s)
Liked: 705
Another way to understand the benefits of a baffle wall is to understand the concept of "Speaker-Boundary Interference Response" or SBIR. https://www.gikacoustics.com/speaker-boundary-interference-response-sbir/

Nyal has a great explanation of SBIR with a calculator on his website also: http://store.acousticfrontiers.com/Speaker-Boundary-Interference.html

When you mount a speaker flush to the baffle, you eliminate the SBIR associated with that boundary. All in-wall speakers take advantage of this. However, most in-walls don't have back enclosures, and most walls are not true baffles; i.e., they're made of drywall which is porous to sound, especially at lower frequencies. However, when you take an enclosed speaker like a JTR speaker and place it flush with a hard, sound transmission resistant baffle, you get all the benefits of a baffle wall.

Archaea, do you plan to build some toe-in to your baffle wall? Toe-in is generally beneficial for most speakers, and I would imagine that would hold true for JTR speakers. The front side ports make it especially easy to build them into baffle walls, (although I've only ever seen sealed speakers used in baffle walls.)

Craig

Lombardi said it:
Perfection is not attainable, but if we chase perfection we can catch excellence."

My System

craig john is offline  
Old 05-04-2014, 01:11 PM
AVS Club Gold
 
craig john's Avatar
 
Join Date: Oct 2003
Location: Lancaster, PA
Posts: 10,930
Mentioned: 33 Post(s)
Tagged: 0 Thread(s)
Quoted: 510 Post(s)
Liked: 705
Quote:
Originally Posted by kma100 View Post

So is a baffle wall speaker the same as an in-wall, i.e. front of the speaker flush with the wall?
Yes, most in-wall speakers are designed as "infinite" baffle speakers. However, as I said above, most in-walls are compromised designs which don't take optimal advantage of the benefits of the infinite baffle design.

Craig

Lombardi said it:
Perfection is not attainable, but if we chase perfection we can catch excellence."

My System

craig john is offline  
Old 05-04-2014, 01:29 PM
AVS Special Member
 
Pain Infliction's Avatar
 
Join Date: Jun 2010
Location: Houston Texas
Posts: 4,280
Mentioned: 12 Post(s)
Tagged: 0 Thread(s)
Quoted: 977 Post(s)
Liked: 502
Quote:
Originally Posted by rhed View Post

I myself did the Irene scene with my S2's. I ran the scene six times straight. And each time I increased the volume. If I remember, by the sixed time, I was at -5 MV I think. Anyway I tripped the breakers on all 4 S2's. And each one of them is on a dedicated 20 amp curcuit.
So now, I don't watch any movies even close to pass -10 anymore. Besides I get a bad nausea feeling if a do. It's just weirded. Anyway, that will all change when the 215's arrive. I'm gonna go for a more balanced approach now..lol

What are your future plans. I probably missed you saying it already, but are you keeping all four of your S2's and the 215's? That is a sick setup!

http://www.computertechnologieslab.com/ Website Design Professionals

The Thompson Theater

RIP William Alexander
Pain Infliction is offline  
Old 05-04-2014, 01:53 PM
AVS Special Member
 
rhed's Avatar
 
Join Date: Nov 2007
Posts: 1,981
Mentioned: 14 Post(s)
Tagged: 0 Thread(s)
Quoted: 574 Post(s)
Liked: 402
Quote:
Originally Posted by Pain Infliction View Post

What are your future plans. I probably missed you saying it already, but are you keeping all four of your S2's and the 215's? That is a sick setup!

Definately keeping the 4 S2's to go along with the 3 215's and 4 single 8's that's on order. With movies and SACD all speakers and subs will on. When days I just like to listen 2 channel music, I'll set the subs to "no". And "large" for mains. Right now I'm in the market for separate power for the 215's. But before I take the plunge on amps, my friend who's a DJ will lend me a few amps to try out. So it'll run on my AVR for now which is 4 ohm capable. Until I decide which amps to go with. I'm really looking into mono blocks though or bridge pro amps if I go that route.
rhed is online now  
Old 05-04-2014, 02:35 PM
Member
 
jaimectrs's Avatar
 
Join Date: Apr 2014
Posts: 115
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 62 Post(s)
Liked: 99

good points, I will run Audyssey and make adjustments but it would not be useful to extrapolate the response to speakers I will get in the future.  I guess I'll just have to wait till I have my speakers to figure that stuff out, just too many variables. Even if someone on the forum had the same exact setup that I plan to have, they still would have a totally different response based on their room size and acoustic treatments... I think I'm starting to get it:).  I'll stick with a minidsp for now.

jaimectrs is offline  
Old 05-04-2014, 03:21 PM
AVS Special Member
 
Archaea's Avatar
 
Join Date: Apr 2004
Location: Kansas City, MO
Posts: 9,386
Mentioned: 344 Post(s)
Tagged: 2 Thread(s)
Quoted: 2439 Post(s)
Liked: 2083
Yes I can toe in a little bit. I'm leaning toawards putting all three speakers behind the screen. That makes for an 11 foot spread left to right. All upright. The speakers are about 12" wide and my studs have 14" of space between each. So I can toe in enough with that two spare inches between the studs.

I will not hoard audio gear
I will not hoard audio gear
I will not hoard audio gear
Archaea's FS Thread
Archaea is offline  
Old 05-04-2014, 03:53 PM
AVS Special Member
 
NWCgrad's Avatar
 
Join Date: Feb 2010
Location: Frederick, MD
Posts: 2,837
Mentioned: 35 Post(s)
Tagged: 0 Thread(s)
Quoted: 993 Post(s)
Liked: 900
I bet that will be pretty awesome. Have you picked sub driver for those sealed enclosures you have? Really sucks about the delay on the Dayton Audio driver.

___________________________________________
Two ears and a brain comprise a powerful acoustical analysis tool, able to extract enormous resolution, detail, and pleasure from circumstances that, when subject to mere technical measurements, seem to be disastrous. Floyd Toole
http://www.avsforum.com/forum/15-gen...sement-ht.html[/B]
NWCgrad is online now  
Old 05-04-2014, 03:58 PM
AVS Special Member
 
jlpowell84's Avatar
 
Join Date: Dec 2012
Location: Eugene, OR
Posts: 6,292
Mentioned: 68 Post(s)
Tagged: 0 Thread(s)
Quoted: 1488 Post(s)
Liked: 661
So with all this baffle talk is it second best to place absorption behind the speaker if a baffle wall is not possible? I mean better than leaving it bare?

FTW21 Ported Build
Volt 10 build
I miss Giants baseball!
jlpowell84 is offline  
Old 05-04-2014, 04:55 PM
AVS Special Member
 
rhed's Avatar
 
Join Date: Nov 2007
Posts: 1,981
Mentioned: 14 Post(s)
Tagged: 0 Thread(s)
Quoted: 574 Post(s)
Liked: 402
Quote:
Originally Posted by jlpowell84 View Post

Yes we all grow up and mature at some point! biggrin.gif

Oh no.. Not me.. I refuse to be old..lol.. Maybe I produce to much testosterone.. Matter of fact I think I've been going through a 10 year mid crisis! Lol..
rhed is online now  
Old 05-04-2014, 05:10 PM
AVS Special Member
 
HTPCat's Avatar
 
Join Date: Dec 2007
Location: Citrus Heights, CA
Posts: 1,597
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 223 Post(s)
Liked: 143
Quote:
Originally Posted by Archaea View Post

Yes I can toe in a little bit. I'm leaning toawards putting all three speakers behind the screen. That makes for an 11 foot spread left to right. All upright. The speakers are about 12" wide and my studs have 14" of space between each. So I can toe in enough with that two spare inches between the studs.
I am thinking of doing a baffle wall also. Would have to DIY as there is very little in the HT budget. I will probably start the screen wall late summer and would be interested in following the details of your build when you do it. Is there a DIY guide that you are using to build it?

HTPCat
"I have a need to feed the hole with more Audio & Video toys"
HTPCat is online now  
Old 05-04-2014, 05:48 PM
AVS Special Member
 
jlpowell84's Avatar
 
Join Date: Dec 2012
Location: Eugene, OR
Posts: 6,292
Mentioned: 68 Post(s)
Tagged: 0 Thread(s)
Quoted: 1488 Post(s)
Liked: 661
Quote:
Originally Posted by rhed View Post

Oh no.. Not me.. I refuse to be old..lol.. Maybe I produce to much testosterone.. Matter of fact I think I've been going through a 10 year mid crisis! Lol..

Maybe those new Red Wing boots combined with your exceptional Testosterone production will up your production at work and you could do a 7 channel 215RT systems with quad S2's eek.gif

FTW21 Ported Build
Volt 10 build
I miss Giants baseball!
jlpowell84 is offline  
Old 05-04-2014, 06:05 PM
AVS Special Member
 
rhed's Avatar
 
Join Date: Nov 2007
Posts: 1,981
Mentioned: 14 Post(s)
Tagged: 0 Thread(s)
Quoted: 574 Post(s)
Liked: 402
Quote:
Originally Posted by jlpowell84 View Post

Maybe those new Red Wing boots combined with your exceptional Testosterone production will up your production at work and you could do a 7 channel 215RT systems with quad S2's eek.gif

LMAO!!.. Nice one brother! I caught on to that one! Lol!
rhed is online now  
Old 05-04-2014, 06:05 PM
Senior Member
 
kma100's Avatar
 
Join Date: Nov 2010
Location: Hoboken
Posts: 269
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 17 Post(s)
Liked: 16
Quote:
Originally Posted by craig john View Post

Yes, most in-wall speakers are designed as "infinite" baffle speakers. However, as I said above, most in-walls are compromised designs which don't take optimal advantage of the benefits of the infinite baffle design.

Craig

Thanks - will take a closer look at the PDF paper.
kma100 is offline  
Old 05-04-2014, 06:09 PM
AVS Special Member
 
jlpowell84's Avatar
 
Join Date: Dec 2012
Location: Eugene, OR
Posts: 6,292
Mentioned: 68 Post(s)
Tagged: 0 Thread(s)
Quoted: 1488 Post(s)
Liked: 661
Well for those interested in my latest REW weirdness it has become obvious it is software acting up. I un-installed everything and re-installed following the Mac computer process found in AustinJerry's setup guide. I had followed it before when I was completely new and the setup and operation were flawless. I have literally been through 30 plus evenings of measurement sessions just getting to know the software and it's capabilities and obviously optimizing subwoofer placement in my room. And also to see the positive changes, and what filters to implement with my mini dsp unit. But now I can't even to get it to work right. There is a simple process in which you calibrate the SPL levels in REW on a button on REW's SPL meter. This obviously gives you an accurate noise floor and then accurate SPL levels of your sweeps. I had a noise floor of 44-45db before and after treatments about 41-42 db. As expected...But now after calibrating I have a noise floor of 71db in REW lol! My RS SPL meter reads 37db lol!

Anyway I think I am done trying to figure it out, although it will bug the crap out of me. I may pick up a windows based laptop to continue in the future. Unitl then I may troll HTS to see if any Mac users have had issues. And enjoy the dang system!!!!!!!!!

FTW21 Ported Build
Volt 10 build
I miss Giants baseball!
jlpowell84 is offline  
Old 05-04-2014, 06:11 PM
AVS Special Member
 
jlpowell84's Avatar
 
Join Date: Dec 2012
Location: Eugene, OR
Posts: 6,292
Mentioned: 68 Post(s)
Tagged: 0 Thread(s)
Quoted: 1488 Post(s)
Liked: 661
Quote:
Originally Posted by rhed View Post

LMAO!!.. Nice one brother! I caught on to that one! Lol!

For real though I finally got a pair of the Georgia Romeo's and they are the only shoe my feet have never hurt in! I'm all over the place and here and there I would get aches but not the Romeo's. I wouldn't say they are the most durable shoe and won't last like Red Wing's but the cost 65 a pair so...anyway, back to speaks...

FTW21 Ported Build
Volt 10 build
I miss Giants baseball!
jlpowell84 is offline  
Old 05-04-2014, 06:15 PM
AVS Special Member
 
rhed's Avatar
 
Join Date: Nov 2007
Posts: 1,981
Mentioned: 14 Post(s)
Tagged: 0 Thread(s)
Quoted: 574 Post(s)
Liked: 402
Quote:
Originally Posted by jlpowell84 View Post

Well for those interested in my latest REW weirdness it has become obvious it is software acting up. I un-installed everything and re-installed following the Mac computer process found in AustinJerry's setup guide. I had followed it before when I was completely new and the setup and operation were flawless. I have literally been through 30 plus evenings of measurement sessions just getting to know the software and it's capabilities and obviously optimizing subwoofer placement in my room. And also to see the positive changes, and what filters to implement with my mini dsp unit. But now I can't even to get it to work right. There is a simple process in which you calibrate the SPL levels in REW on a button on REW's SPL meter. This obviously gives you an accurate noise floor and then accurate SPL levels of your sweeps. I had a noise floor of 44-45db before and after treatments about 41-42 db. As expected...But now after calibrating I have a noise floor of 71db in REW lol! My RS SPL meter reads 37db lol!

Anyway I think I am done trying to figure it out, although it will bug the crap out of me. I may pick up a windows based laptop to continue in the future. Unitl then I may troll HTS to see if any Mac users have had issues. And enjoy the dang system!!!!!!!!!

jp.. Have you tried moving the subs around? Maybe try front firing the SubM's. Maybe xt32 is doing something to the subs.
rhed is online now  
Old 05-04-2014, 07:48 PM
AVS Special Member
 
Skylinestar's Avatar
 
Join Date: Jun 2008
Location: Borneo Island
Posts: 2,404
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 869 Post(s)
Liked: 146
Quote:
Originally Posted by jlpowell84 View Post

Tell me more, what is the RCA style? I think uninstalling everything and re-instralling is what I am going to do. I have bass just not during my REW sweeps
Instead of digital output via the computer's HDMI, use the conventional analogue out, ie 3.5mm audiojack or RCA on USB audio interface.
Skylinestar is offline  
Old 05-04-2014, 07:51 PM
AVS Special Member
 
jlpowell84's Avatar
 
Join Date: Dec 2012
Location: Eugene, OR
Posts: 6,292
Mentioned: 68 Post(s)
Tagged: 0 Thread(s)
Quoted: 1488 Post(s)
Liked: 661
Quote:
Originally Posted by Skylinestar View Post

Instead of digital output via the computer's HDMI, use the conventional analogue out, ie 3.5mm audiojack or RCA on USB audio interface.

hmmm, know of any tutorials on this setup? smile.gif

FTW21 Ported Build
Volt 10 build
I miss Giants baseball!
jlpowell84 is offline  
Old 05-04-2014, 10:28 PM
AVS Special Member
 
Skylinestar's Avatar
 
Join Date: Jun 2008
Location: Borneo Island
Posts: 2,404
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 869 Post(s)
Liked: 146
Skylinestar is offline  
Old 05-04-2014, 10:43 PM
Newbie
 
HToutofoffice's Avatar
 
Join Date: May 2014
Posts: 5
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
Quote:
Originally Posted by craig john View Post


This article by Anthony Grimani explains the concept of baffle walls.
040601_baffled_again.pdf 180k .pdf file

Craig

 

Thanks, good read.

HToutofoffice is offline  
Old 05-04-2014, 11:20 PM
AVS Special Member
 
jlpowell84's Avatar
 
Join Date: Dec 2012
Location: Eugene, OR
Posts: 6,292
Mentioned: 68 Post(s)
Tagged: 0 Thread(s)
Quoted: 1488 Post(s)
Liked: 661

Sweet! Thanks! So that is just a 3.5mm to L/R RCA HUH? Seems too simple!

FTW21 Ported Build
Volt 10 build
I miss Giants baseball!
jlpowell84 is offline  
Old 05-05-2014, 07:21 PM
AVS Special Member
 
raynist's Avatar
 
Join Date: Dec 2002
Location: Pittsburgh
Posts: 2,820
Mentioned: 25 Post(s)
Tagged: 0 Thread(s)
Quoted: 937 Post(s)
Liked: 897
I upgraded to an Onkyo 5509 pre/pro and beringher inuke 3000 DSP's a few weeks ago. I guess I am still not used to it.

Last night I turned on the NHL playoffs and had no sound. Turned off the onkyo and dish receiver several times until I realized I didn't turn on my amps....this is the second time this happened!

JTR (3 215 RT, 3 212HTR, 2 228HT, 2 Growlers, 4 S2's)
PSA (4 Triax's)
DIY Sound Group (4 Volt 8's in Slanted boxes, 3 Volt 8's in Ported boxes)
SVS (2 SB13+ and one SB12-NSD)
Klipsch (All for sale! 2 pair Cornwalls, 3 pair Forte's 1 pair Heresy's)
raynist is offline  
Old 05-05-2014, 07:45 PM
AVS Special Member
 
Archaea's Avatar
 
Join Date: Apr 2004
Location: Kansas City, MO
Posts: 9,386
Mentioned: 344 Post(s)
Tagged: 2 Thread(s)
Quoted: 2439 Post(s)
Liked: 2083
Get a smart switching power strip or a monster hts 5300 or something equivalent to turn the amps on and off with the preamp. You are running the inukes on mains duty and probably sucking very little power.

I will not hoard audio gear
I will not hoard audio gear
I will not hoard audio gear
Archaea's FS Thread
Archaea is offline  
Old 05-05-2014, 07:56 PM
AVS Special Member
 
raynist's Avatar
 
Join Date: Dec 2002
Location: Pittsburgh
Posts: 2,820
Mentioned: 25 Post(s)
Tagged: 0 Thread(s)
Quoted: 937 Post(s)
Liked: 897
Quote:
Originally Posted by Archaea View Post

Get a smart switching power strip or a monster hts 5300 or something equivalent to turn the amps on and off with the preamp. You are running the inukes on mains duty and probably sucking very little power.

I forgot to mention that I did order a used power conditioner that has 6 outlets that are activated via a 12v input.

I felt really dumb the second time it happened!

JTR (3 215 RT, 3 212HTR, 2 228HT, 2 Growlers, 4 S2's)
PSA (4 Triax's)
DIY Sound Group (4 Volt 8's in Slanted boxes, 3 Volt 8's in Ported boxes)
SVS (2 SB13+ and one SB12-NSD)
Klipsch (All for sale! 2 pair Cornwalls, 3 pair Forte's 1 pair Heresy's)
raynist is offline  
Old 05-06-2014, 01:33 PM
AVS Special Member
 
RMK!'s Avatar
 
Join Date: Oct 2005
Location: 95608
Posts: 7,669
Mentioned: 38 Post(s)
Tagged: 0 Thread(s)
Quoted: 1437 Post(s)
Liked: 1243
Just an FYI ... there is another JTR powered HT of the Month starting today. It has a really sad back story about a slightly neurotic guy who keeps changing out his equipment every few months. I just don't understand people who can't be happy with what they have ... confused.gif
smile.gif

Opinions are not facts.
RMK! is offline  
Old 05-06-2014, 02:27 PM
Deep Sea Sound
 
dgage's Avatar
 
Join Date: Dec 2003
Location: Knoxville, TN
Posts: 3,155
Mentioned: 130 Post(s)
Tagged: 0 Thread(s)
Quoted: 1454 Post(s)
Liked: 1214
Quote:
Originally Posted by RMK! View Post

Just an FYI ... there is another JTR powered HT of the Month starting today. It has a really sad back story about a slightly neurotic guy who keeps changing out his equipment every few months. I just don't understand people who can't be happy with what they have ... confused.gif
smile.gif

I got dizzy going through the first few pictures. I felt like I was in a whirlwind of change. smile.gif But the end result is amazing!

David Gage
Deep Sea Sound
"You don't listen to our subs, you EXPERIENCE them!"
dgage is online now  
Old 05-06-2014, 03:24 PM
AVS Special Member
 
COACH2369's Avatar
 
Join Date: Nov 2004
Location: Knoxville, TN
Posts: 2,361
Mentioned: 23 Post(s)
Tagged: 0 Thread(s)
Quoted: 480 Post(s)
Liked: 353
Quote:
Originally Posted by RMK! View Post

Just an FYI ... there is another JTR powered HT of the Month starting today. It has a really sad back story about a slightly neurotic guy who keeps changing out his equipment every few months. I just don't understand people who can't be happy with what they have ... confused.gif
smile.gif

CONGRATS!

I enjoy reading about theaters being honored that have JTR speakers in them...and especially a room like yours.

My room(while not nearly as nice as yours) is also a room that I had to keep somewhat intact in the event we sold the house so it could be converted back into a bedroom if needed.

Great job!
COACH2369 is online now  
Old 05-06-2014, 04:03 PM
AVS Special Member
 
RMK!'s Avatar
 
Join Date: Oct 2005
Location: 95608
Posts: 7,669
Mentioned: 38 Post(s)
Tagged: 0 Thread(s)
Quoted: 1437 Post(s)
Liked: 1243
Quote:
Originally Posted by COACH2369 View Post

CONGRATS!

I enjoy reading about theaters being honored that have JTR speakers in them...and especially a room like yours.

My room(while not nearly as nice as yours) is also a room that I had to keep somewhat intact in the event we sold the house so it could be converted back into a bedroom if needed.

Great job!

Thanks Coach, we all prefer our own brand ... don't we ... tongue.gif

This started out as my suggesting to Scott Wilkinson that he come to the GTG (short filght from LA) and do a story on the Get Together. At the time, he hadn't yet done his Keith Yates Podcast and Keith had accepted the GTG invite. Throw in John Hamm from Pono Music, and he could have knocked off 2 very cool Podcasts in one day plus, been able to report on the GTG.

It then turned into the standard HToM deal and I admit to being a little disappointed but hey, it's cool getting the story of my working my way up and down the audiophile food chain out there. In my case the "down" is definitely up if you know what I mean. I think all JTR owners know what I mean... smile.gif

Opinions are not facts.
RMK! is offline  
Old 05-06-2014, 04:46 PM
Senior Member
 
Goalline's Avatar
 
Join Date: Jun 2003
Posts: 267
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 40 Post(s)
Liked: 48
Quote:
Originally Posted by RMK! View Post

Just an FYI ... there is another JTR powered HT of the Month starting today. It has a really sad back story about a slightly neurotic guy who keeps changing out his equipment every few months. I just don't understand people who can't be happy with what they have ... confused.gif
smile.gif

Wow, clearly, that guy has a sickness. Is it contagious? I hope so. I am so jealous. Great job by Scott, chronicling the improvement of your system over the years.
Goalline is offline  
Sponsored Links
Advertisement
 
 

Tags
215RT , 228ht , captivator , Jtr , Jtr Noesis 212ht 212ht Lp , noesis
Thread Tools


Forum Jump: 

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off