Official JTR Speakers Subwoofer Thread - Page 447 - AVS Forum | Home Theater Discussions And Reviews
Forum Jump: 
 19093Likes
Reply
 
Thread Tools
post #13381 of 13681 Old 10-12-2019, 03:51 PM
Senior Member
 
toddct's Avatar
 
Join Date: Feb 2007
Location: Houston, TX
Posts: 436
Mentioned: 51 Post(s)
Tagged: 0 Thread(s)
Quoted: 284 Post(s)
Liked: 822
Quote:
Originally Posted by mthomas47 View Post
PS: I don't know that I would try to play the Cap 4000's with the JBL's, though.
What up Mike? Just curious, do you mean the JBL speakers or the JBL subs or both?

Todd

“People say nothing is impossible, but I do nothing every day.”― A.A. Milne, Winnie-the-Pooh
toddct is offline  
Sponsored Links
Advertisement
 
post #13382 of 13681 Old 10-12-2019, 03:58 PM
AVS Forum Special Member
 
serith's Avatar
 
Join Date: Jun 2005
Location: syracuse, ny
Posts: 1,115
Mentioned: 89 Post(s)
Tagged: 0 Thread(s)
Quoted: 847 Post(s)
Liked: 928
Quote:
Originally Posted by toddct View Post
Looks like you're going to find out! Really looking forward to your impressions.

Congrats on the purchase! Any idea of a delivery date?

Todd
thanks! jeff said about a month lead time yesterday when i spoke with him on the phone and placed the order. i'm in no rush as dad & i are currently building the riser for the 2nd row of seating that they're going to live under. the riser is ~21" off the carpet which will let me slide in the captivators so the front row still benefits the most from all of the tactile energy and you'll only see the drivers flush with the riser and not the massive cabinets. i also purchased an additional seat for the front row which is an armless seat (that still reclines) that will slip into the row of 3 so the seating will look like: "|0|00|0|" (arm, seat, arm, seat, seat, arm, seat, arm). this gives me 4 premium front row seats [while my door still has enough clearance to open] that are ideal distance from screen & in the middle of the room for best sound, and a row of 5 "front row" tiered seats (same make/brand as front row but not as tall) that will be in a couch config in the rear (see pic below). these seats are 32.5" tall vs. my front row which are 40" tall. this is such a delicate balancing act to fit as many seats as i can, keep the tactile energy from the subs for front row, not block the surrounds or projector, and work around my ~6'8" average ceiling height. the top of the rear seats is going to clip the rear surrounds by a couple of inches but the tweeters in those speakers is at the top, so should be fine. i'm also going to have to move the equipment up 1 shelf each as the bottom shelf is going to be unusable because of the rear seating height, easy fix though as we built the cabinet with modular shelving. so far this is all unfolding nicely though, hopefully no surprises but who knows. i'll have to throw together another youtube video soon to showcase all of these changes better haha. i can't believe that i'm tripling the number of seats but it'll be so nice to be able to have a bunch of people over and not have to tell them to sit on the floor! i could have went with different seat configs in the rear to allow for more arm-rests & cupholders (at the expense of 1 seat) but i want to be able to lay down too if i feel like it which i couldn't before.



chucky7 likes this.

Last edited by serith; 10-12-2019 at 04:12 PM.
serith is offline  
post #13383 of 13681 Old 10-12-2019, 04:23 PM
Senior Member
 
toddct's Avatar
 
Join Date: Feb 2007
Location: Houston, TX
Posts: 436
Mentioned: 51 Post(s)
Tagged: 0 Thread(s)
Quoted: 284 Post(s)
Liked: 822
I saw all of that in your post a page or so back. Sounds like quite the undertaking but a mans gotta do what a mans gotta do to get stellar bass!

I’m sure it will all be worth it and you got your dads help. I’ll bet he’s just as excited!

Todd
chucky7 and serith like this.

“People say nothing is impossible, but I do nothing every day.”― A.A. Milne, Winnie-the-Pooh
toddct is offline  
Sponsored Links
Advertisement
 
post #13384 of 13681 Old 10-12-2019, 04:46 PM
AVS Forum Special Member
 
farsider3000's Avatar
 
Join Date: Jan 2012
Location: Houston, Texas
Posts: 1,989
Mentioned: 12 Post(s)
Tagged: 0 Thread(s)
Quoted: 1613 Post(s)
Liked: 1005
Quote:
Originally Posted by serith View Post
thanks! jeff said about a month lead time yesterday when i spoke with him on the phone and placed the order. i'm in no rush as dad & i are currently building the riser for the 2nd row of seating that they're going to live under. the riser is ~21" off the carpet which will let me slide in the captivators so the front row still benefits the most from all of the tactile energy and you'll only see the drivers flush with the riser and not the massive cabinets. i also purchased an additional seat for the front row which is an armless seat (that still reclines) that will slip into the row of 3 so the seating will look like: "|0|00|0|" (arm, seat, arm, seat, seat, arm, seat, arm). this gives me 4 premium front row seats [while my door still has enough clearance to open] that are ideal distance from screen & in the middle of the room for best sound, and a row of 5 "front row" tiered seats (same make/brand as front row but not as tall) that will be in a couch config in the rear (see pic below). these seats are 32.5" tall vs. my front row which are 40" tall. this is such a delicate balancing act to fit as many seats as i can, keep the tactile energy from the subs for front row, not block the surrounds or projector, and work around my ~6'8" average ceiling height. the top of the rear seats is going to clip the rear surrounds by a couple of inches but the tweeters in those speakers is at the top, so should be fine. i'm also going to have to move the equipment up 1 shelf each as the bottom shelf is going to be unusable because of the rear seating height, easy fix though as we built the cabinet with modular shelving. so far this is all unfolding nicely though, hopefully no surprises but who knows. i'll have to throw together another youtube video soon to showcase all of these changes better haha. i can't believe that i'm tripling the number of seats but it'll be so nice to be able to have a bunch of people over and not have to tell them to sit on the floor! i could have went with different seat configs in the rear to allow for more arm-rests & cupholders (at the expense of 1 seat) but i want to be able to lay down too if i feel like it which i couldn't before.








I would fill that riser with insulation between each hoist and consider “walling off” the area with the subs so you don’t create a boom effect. You don’t want a huge open cavity where the sub energy is coming from.

Looks like a good solution to allow you to fit the subs and seats!


Sent from my iPhone using Tapatalk Pro
serith likes this.

7.4.6 system: Processors:Marantz 8805 || Xilica XP4080 Amps: Parasound A31 and ATI AT528NC & AT526NC n-core ||Speakers: Procella P8 LCR, Procella P5/P5 in-wall
Subs: JTR Captivator subs: One S2, Two RS2, One S1
Screen: 2.40:1 Seymour XD Acoustically Transparent, 128" diagonal / 118" wide || Projector: JVC X570/RS420
farsider3000 is offline  
post #13385 of 13681 Old 10-12-2019, 04:51 PM
AVS Forum Special Member
 
serith's Avatar
 
Join Date: Jun 2005
Location: syracuse, ny
Posts: 1,115
Mentioned: 89 Post(s)
Tagged: 0 Thread(s)
Quoted: 847 Post(s)
Liked: 928
Quote:
Originally Posted by farsider3000 View Post
I would fill that riser with insulation between each hoist and consider “walling off” the area with the subs so you don’t create a boom effect. You don’t want a huge open cavity where the sub energy is coming from.

Looks like a good solution to allow you to fit the subs and seats!

definitely. i'm thinking stuffing the cavity entirely with roxul unless anyone else has a better suggestion?
mthomas47 likes this.
serith is offline  
post #13386 of 13681 Old 10-12-2019, 04:54 PM
AVS Forum Special Member
 
ScottieBoysName's Avatar
 
Join Date: Jan 2009
Location: Texas
Posts: 2,066
Mentioned: 9 Post(s)
Tagged: 0 Thread(s)
Quoted: 1307 Post(s)
Liked: 477
Official JTR Speakers Subwoofer Thread

Quote:
Originally Posted by serith View Post
definitely. i'm thinking stuffing the cavity entirely with roxul unless anyone else has a better suggestion?


I’d check out the sound absorption and deadening thread in the HT Builder section.

I’m not sure if it’s the same thing, but I stuffed a cavity behind my screen with 20 inches deep of pink fluffy.







Last edited by ScottieBoysName; 10-12-2019 at 04:59 PM.
ScottieBoysName is offline  
post #13387 of 13681 Old 10-12-2019, 04:54 PM
AVS ***** Member
 
mthomas47's Avatar
 
Join Date: Nov 2007
Posts: 8,326
Mentioned: 353 Post(s)
Tagged: 0 Thread(s)
Quoted: 5530 Post(s)
Liked: 10651
Quote:
Originally Posted by toddct View Post
What up Mike? Just curious, do you mean the JBL speakers or the JBL subs or both?

Todd

Hi Todd,

Oops, I guess you were just referring to the speakers, and not to the JBL subs. Duh! I think that, in theory, any good speakers can be paired with any good subwoofers. So, the JBL's and the JTR's should do very well together.

Regards,
Mike
toddct and farsider3000 like this.

GUIDE TO SUBWOOFER CALIBRATION AND BASS PREFERENCES

* The Guide linked above is a comprehensive guide to Audio & HT systems, including:
Speaker placements & Room treatments; HT calibration & Room EQ; Room gain; Bass
Preferences; Subwoofer Buyer's Guide: Sealed/ported; ID subs; Subwoofer placement.
mthomas47 is offline  
post #13388 of 13681 Old 10-12-2019, 04:57 PM
AVS Forum Special Member
 
farsider3000's Avatar
 
Join Date: Jan 2012
Location: Houston, Texas
Posts: 1,989
Mentioned: 12 Post(s)
Tagged: 0 Thread(s)
Quoted: 1613 Post(s)
Liked: 1005
Quote:
Originally Posted by serith View Post
definitely. i'm thinking stuffing the cavity entirely with roxul unless anyone else has a better suggestion?
I know this is a science that I am not an expert at. My acoustic engineer specified pink insulation vs cotton or other material behind my baffle wall due to the specific density of the pink insulation. But for the riser application maybe another material like Roxul will work best. Agree that you should check in the dedicated forum or hire an acoustic engineer.
mthomas47 and ScottieBoysName like this.

7.4.6 system: Processors:Marantz 8805 || Xilica XP4080 Amps: Parasound A31 and ATI AT528NC & AT526NC n-core ||Speakers: Procella P8 LCR, Procella P5/P5 in-wall
Subs: JTR Captivator subs: One S2, Two RS2, One S1
Screen: 2.40:1 Seymour XD Acoustically Transparent, 128" diagonal / 118" wide || Projector: JVC X570/RS420
farsider3000 is offline  
post #13389 of 13681 Old 10-12-2019, 05:25 PM
AVS Forum Special Member
 
ScottieBoysName's Avatar
 
Join Date: Jan 2009
Location: Texas
Posts: 2,066
Mentioned: 9 Post(s)
Tagged: 0 Thread(s)
Quoted: 1307 Post(s)
Liked: 477
Quote:
Originally Posted by farsider3000 View Post
I know this is a science that I am not an expert at. My acoustic engineer specified pink insulation vs cotton or other material behind my baffle wall due to the specific density of the pink insulation. But for the riser application maybe another material like Roxul will work best. Agree that you should check in the dedicated forum or hire an acoustic engineer.


I used pink. I built shelves to hold it all. Pics up a few posts.
ScottieBoysName is offline  
post #13390 of 13681 Old 10-12-2019, 09:45 PM
AVS Forum Special Member
 
farsider3000's Avatar
 
Join Date: Jan 2012
Location: Houston, Texas
Posts: 1,989
Mentioned: 12 Post(s)
Tagged: 0 Thread(s)
Quoted: 1613 Post(s)
Liked: 1005
Hum in new RS2 sub

Well I am not too happy tonight after setting up one of my two RS2 subs.

I now have a 60Hz hum when I did not have one with the previous Seatons and I don't have this hum in my S2 or S1. I have tried multiple circuits but the next test is to unplug the S2 and plug in the RS2 to test on that circuit.

As it stands now I would say they are not usable for me. My room is "soundproofed" and extremely quiet so this low level hum is noticeable and that is only with one of the RS2 plugged in.

Ugh I feel terrible if I have to ship these back as they were back breaking to get upstairs and I have no idea how I would package the one I opened to be shipped back. Not a fun night.

7.4.6 system: Processors:Marantz 8805 || Xilica XP4080 Amps: Parasound A31 and ATI AT528NC & AT526NC n-core ||Speakers: Procella P8 LCR, Procella P5/P5 in-wall
Subs: JTR Captivator subs: One S2, Two RS2, One S1
Screen: 2.40:1 Seymour XD Acoustically Transparent, 128" diagonal / 118" wide || Projector: JVC X570/RS420
farsider3000 is offline  
post #13391 of 13681 Old 10-12-2019, 09:52 PM
Senior Member
 
toddct's Avatar
 
Join Date: Feb 2007
Location: Houston, TX
Posts: 436
Mentioned: 51 Post(s)
Tagged: 0 Thread(s)
Quoted: 284 Post(s)
Liked: 822
While many people would not recommend this as a long term solution, you could try a cheater plug and see if that solves the issue in the short term.

Todd
DRC3 likes this.

“People say nothing is impossible, but I do nothing every day.”― A.A. Milne, Winnie-the-Pooh
toddct is offline  
post #13392 of 13681 Old 10-12-2019, 10:14 PM
AVS Forum Special Member
 
farsider3000's Avatar
 
Join Date: Jan 2012
Location: Houston, Texas
Posts: 1,989
Mentioned: 12 Post(s)
Tagged: 0 Thread(s)
Quoted: 1613 Post(s)
Liked: 1005
Official JTR Speakers Subwoofer Thread

Quote:
Originally Posted by toddct View Post
While many people would not recommend this as a long term solution, you could try a cheater plug and see if that solves the issue in the short term.



Todd

I will try that for temporary diagnostics as I don’t think it is a ground issue but who knows. My other subs don’t have this issue.


Sent from my iPhone using Tapatalk Pro

7.4.6 system: Processors:Marantz 8805 || Xilica XP4080 Amps: Parasound A31 and ATI AT528NC & AT526NC n-core ||Speakers: Procella P8 LCR, Procella P5/P5 in-wall
Subs: JTR Captivator subs: One S2, Two RS2, One S1
Screen: 2.40:1 Seymour XD Acoustically Transparent, 128" diagonal / 118" wide || Projector: JVC X570/RS420
farsider3000 is offline  
post #13393 of 13681 Old 10-12-2019, 10:25 PM
AVS Forum Special Member
 
farsider3000's Avatar
 
Join Date: Jan 2012
Location: Houston, Texas
Posts: 1,989
Mentioned: 12 Post(s)
Tagged: 0 Thread(s)
Quoted: 1613 Post(s)
Liked: 1005
Quote:
Originally Posted by toddct View Post
While many people would not recommend this as a long term solution, you could try a cheater plug and see if that solves the issue in the short term.



Todd


I did try using a HumX unit that reduces 60Hz hum due to grounding issues but it had no effect.


Sent from my iPhone using Tapatalk Pro

7.4.6 system: Processors:Marantz 8805 || Xilica XP4080 Amps: Parasound A31 and ATI AT528NC & AT526NC n-core ||Speakers: Procella P8 LCR, Procella P5/P5 in-wall
Subs: JTR Captivator subs: One S2, Two RS2, One S1
Screen: 2.40:1 Seymour XD Acoustically Transparent, 128" diagonal / 118" wide || Projector: JVC X570/RS420
farsider3000 is offline  
post #13394 of 13681 Old 10-12-2019, 10:49 PM
AVS Forum Special Member
 
chucky7's Avatar
 
Join Date: Apr 2002
Location: Rancho Cucamonga, CA
Posts: 4,774
Mentioned: 310 Post(s)
Tagged: 0 Thread(s)
Quoted: 3632 Post(s)
Liked: 4761
Quote:
Originally Posted by farsider3000 View Post
Well I am not too happy tonight after setting up one of my two RS2 subs.

I now have a 60Hz hum when I did not have one with the previous Seatons and I don't have this hum in my S2 or S1. I have tried multiple circuits but the next test is to unplug the S2 and plug in the RS2 to test on that circuit.

As it stands now I would say they are not usable for me. My room is "soundproofed" and extremely quiet so this low level hum is noticeable and that is only with one of the RS2 plugged in.

Ugh I feel terrible if I have to ship these back as they were back breaking to get upstairs and I have no idea how I would package the one I opened to be shipped back. Not a fun night.
Wait, IIRC, you are using a XLR cable to this RS2 and there is hum?

Speakers: L/C/R: JTR Noesis 212HT. Surrounds: Jamo C103, KEF Q100, Polk Audio RTiA3.
Subwoofer: JTR Captivator 4000ULF.
AVR: Denon AVR-X4400H. TV: Samsung UN75NU8000FXZA.

FS: Jamo C103, KEF Q100 and Polk RTiA3
chucky7 is online now  
post #13395 of 13681 Old 10-12-2019, 10:51 PM
AVS Forum Special Member
 
farsider3000's Avatar
 
Join Date: Jan 2012
Location: Houston, Texas
Posts: 1,989
Mentioned: 12 Post(s)
Tagged: 0 Thread(s)
Quoted: 1613 Post(s)
Liked: 1005
Quote:
Originally Posted by chucky7 View Post
Wait, IIRC, you are using a XLR cable to this RS2 and there is hum?


Yes ... with XLR cable. My old S2 has zero hum with my ear to the speaker... will test more tomorrow but I am pretty experienced with ground loop hum and everything I have done so far tells me the hum is just inherent in this new/different amp.


Sent from my iPhone using Tapatalk Pro

7.4.6 system: Processors:Marantz 8805 || Xilica XP4080 Amps: Parasound A31 and ATI AT528NC & AT526NC n-core ||Speakers: Procella P8 LCR, Procella P5/P5 in-wall
Subs: JTR Captivator subs: One S2, Two RS2, One S1
Screen: 2.40:1 Seymour XD Acoustically Transparent, 128" diagonal / 118" wide || Projector: JVC X570/RS420
farsider3000 is offline  
post #13396 of 13681 Old 10-12-2019, 10:55 PM
Senior Member
 
toddct's Avatar
 
Join Date: Feb 2007
Location: Houston, TX
Posts: 436
Mentioned: 51 Post(s)
Tagged: 0 Thread(s)
Quoted: 284 Post(s)
Liked: 822
Quote:
Originally Posted by farsider3000 View Post
I did try using a HumX unit that reduces 60Hz hum due to grounding issues but it had no effect.


Sent from my iPhone using Tapatalk Pro
I can only share my experience; I did buy and isolator from amazon that did reduce the hum/ground loop on one of my 2400s but didn't eliminate. It wasn't until I bought cheater plugs that it completely went away. Lots of people advise against doing this and others have been using cheater plugs for years without issue. YMMV, I am far from an expert in this area. Just offering a suggestion.

Todd

“People say nothing is impossible, but I do nothing every day.”― A.A. Milne, Winnie-the-Pooh
toddct is offline  
post #13397 of 13681 Old 10-12-2019, 10:57 PM
AVS Forum Special Member
 
farsider3000's Avatar
 
Join Date: Jan 2012
Location: Houston, Texas
Posts: 1,989
Mentioned: 12 Post(s)
Tagged: 0 Thread(s)
Quoted: 1613 Post(s)
Liked: 1005
Just for clarity the hum is present with or without the XLR cable plugged in.


Sent from my iPhone using Tapatalk Pro

7.4.6 system: Processors:Marantz 8805 || Xilica XP4080 Amps: Parasound A31 and ATI AT528NC & AT526NC n-core ||Speakers: Procella P8 LCR, Procella P5/P5 in-wall
Subs: JTR Captivator subs: One S2, Two RS2, One S1
Screen: 2.40:1 Seymour XD Acoustically Transparent, 128" diagonal / 118" wide || Projector: JVC X570/RS420
farsider3000 is offline  
post #13398 of 13681 Old 10-12-2019, 11:09 PM
AVS Forum Special Member
 
farsider3000's Avatar
 
Join Date: Jan 2012
Location: Houston, Texas
Posts: 1,989
Mentioned: 12 Post(s)
Tagged: 0 Thread(s)
Quoted: 1613 Post(s)
Liked: 1005
New RS2 subwoofer hum

Okay I just used my cheater plug (no ground) and the hum is still there.

Soooooo. it must just be the new amps causing this hum. I have read that 60 Hz hum can be induced by large magnetic fields (from the woofer magnets?) but I am not here to diagnose why it is occurring. What I do know is that it will not work in my theater and I am surprised that more people have not had this issue.

These new subs are sitting on my side walls where my Seatons were placed and they are about 7 ft from the MLP and the hum is clearly audible to my 49 year old ears so that is not going to work for me.

Has anyone had to ship massive subs back to Jeff? Not sure how this would work.. I will send him an email tomorrow. Man this sucks.

7.4.6 system: Processors:Marantz 8805 || Xilica XP4080 Amps: Parasound A31 and ATI AT528NC & AT526NC n-core ||Speakers: Procella P8 LCR, Procella P5/P5 in-wall
Subs: JTR Captivator subs: One S2, Two RS2, One S1
Screen: 2.40:1 Seymour XD Acoustically Transparent, 128" diagonal / 118" wide || Projector: JVC X570/RS420
farsider3000 is offline  
post #13399 of 13681 Old 10-12-2019, 11:30 PM
Advanced Member
 
PoorSignal's Avatar
 
Join Date: Jul 2009
Posts: 640
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 320 Post(s)
Liked: 80
Quote:
Originally Posted by farsider3000 View Post
Okay I just used my cheater plug (no ground) and the hum is still there.

Soooooo. it must just be the new amps causing this hum. I have read that 60 Hz hum can be induced by large magnetic fields (from the woofer magnets?) but I am not here to diagnose why it is occurring. What I do know is that it will not work in my theater and I am surprised that more people have not had this issue.

These new subs are sitting on my side walls where my Seatons were placed and they are about 7 ft from the MLP and the hum is clearly audible to my 49 year old ears so that is not going to work for me.

Has anyone had to ship massive subs back to Jeff? Not sure how this would work.. I will send him an email tomorrow. Man this sucks.
sometimes AC wiring too close to speaker wiring, the speaker will pick it up the hum inductively. Not sure how things are arranged inside.

such a high power high gain amp makes it more easy to hear.
PoorSignal is offline  
post #13400 of 13681 Old 10-13-2019, 12:48 AM
AVS Forum Special Member
 
serith's Avatar
 
Join Date: Jun 2005
Location: syracuse, ny
Posts: 1,115
Mentioned: 89 Post(s)
Tagged: 0 Thread(s)
Quoted: 847 Post(s)
Liked: 928
Quote:
Originally Posted by farsider3000 View Post
Okay I just used my cheater plug (no ground) and the hum is still there.

Soooooo. it must just be the new amps causing this hum. I have read that 60 Hz hum can be induced by large magnetic fields (from the woofer magnets?) but I am not here to diagnose why it is occurring. What I do know is that it will not work in my theater and I am surprised that more people have not had this issue.

These new subs are sitting on my side walls where my Seatons were placed and they are about 7 ft from the MLP and the hum is clearly audible to my 49 year old ears so that is not going to work for me.

Has anyone had to ship massive subs back to Jeff? Not sure how this would work.. I will send him an email tomorrow. Man this sucks.
are both subs exhibiting the same audible hum?
serith is offline  
post #13401 of 13681 Old 10-13-2019, 03:08 AM
AVS Forum Special Member
 
drh3b's Avatar
 
Join Date: Feb 2017
Location: Saint Louis, MO
Posts: 3,824
Mentioned: 34 Post(s)
Tagged: 0 Thread(s)
Quoted: 2056 Post(s)
Liked: 4147
Quote:
Originally Posted by farsider3000 View Post
Okay I just used my cheater plug (no ground) and the hum is still there.

Soooooo. it must just be the new amps causing this hum. I have read that 60 Hz hum can be induced by large magnetic fields (from the woofer magnets?) but I am not here to diagnose why it is occurring. What I do know is that it will not work in my theater and I am surprised that more people have not had this issue.

These new subs are sitting on my side walls where my Seatons were placed and they are about 7 ft from the MLP and the hum is clearly audible to my 49 year old ears so that is not going to work for me.

Has anyone had to ship massive subs back to Jeff? Not sure how this would work.. I will send him an email tomorrow. Man this sucks.
I would try exchanging for a different amp, or even just taking the amp off and make sure all the wiring is firmly in place before trying to ship the subs back.

My World Beating System!
Spoiler!
drh3b is offline  
post #13402 of 13681 Old 10-13-2019, 05:33 AM
AVS Forum Special Member
 
ScottieBoysName's Avatar
 
Join Date: Jan 2009
Location: Texas
Posts: 2,066
Mentioned: 9 Post(s)
Tagged: 0 Thread(s)
Quoted: 1307 Post(s)
Liked: 477
Quote:
Originally Posted by serith View Post
are both subs exhibiting the same audible hum?


If I’m reading right I think just one is.
ScottieBoysName is offline  
post #13403 of 13681 Old 10-13-2019, 05:34 AM
AVS Forum Special Member
 
ScottieBoysName's Avatar
 
Join Date: Jan 2009
Location: Texas
Posts: 2,066
Mentioned: 9 Post(s)
Tagged: 0 Thread(s)
Quoted: 1307 Post(s)
Liked: 477
Quote:
Originally Posted by drh3b View Post
I would try exchanging for a different amp, or even just taking the amp off and make sure all the wiring is firmly in place before trying to ship the subs back.


I’d talk to Jeff about trying this first, before shipping them back. Clearly if only one is making the noise there’s an isolated issue with that sub.
ScottieBoysName is offline  
post #13404 of 13681 Old 10-13-2019, 06:32 AM
Advanced Member
 
PoorSignal's Avatar
 
Join Date: Jul 2009
Posts: 640
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 320 Post(s)
Liked: 80
Hey I don’t know if this helps you but I am troubleshooting a noise issue, but unrelated to JTR. I ordered a true sine wave ups backup. This let me power the unit without house wiring to rule out it is not caused by house wiring or some other appliance injecting the noise. If it still makes the noise on the ups then it seems the problem is with the amp and not your house.

I wanted a ups on the projector afterwards.
PoorSignal is offline  
post #13405 of 13681 Old 10-13-2019, 07:16 AM
AVS Forum Special Member
 
Jeff Permanian's Avatar
 
Join Date: Jun 2007
Location: Wisconsin
Posts: 1,374
Mentioned: 167 Post(s)
Tagged: 0 Thread(s)
Quoted: 910 Post(s)
Liked: 2031
Both RS2 were fully tested and didn't exhibit any noise before they left. Noise issues can be troubling. SpeakerPower has some tips on their website:

https://www.speakerpower.net/noise-r...n-systems.html
Jeff Permanian is offline  
post #13406 of 13681 Old 10-13-2019, 07:22 AM
AVS Forum Special Member
 
farsider3000's Avatar
 
Join Date: Jan 2012
Location: Houston, Texas
Posts: 1,989
Mentioned: 12 Post(s)
Tagged: 0 Thread(s)
Quoted: 1613 Post(s)
Liked: 1005
Quote:
Originally Posted by Jeff Permanian View Post
Both RS2 were fully tested and didn't exhibit any noise before they left. Noise issues can be troubling. SpeakerPower has some tips on their website:



https://www.speakerpower.net/noise-r...n-systems.html


Jeff,

I used a cheater plug to test for ground loop hum and it had no effect. I will plug into the same outlet as my S2 and see what happens but it’s not going to make any difference.

Not sure where they were tested but if it was not in a soundproofed room of some sort you would not be able to hear it.




Sent from my iPhone using Tapatalk Pro

7.4.6 system: Processors:Marantz 8805 || Xilica XP4080 Amps: Parasound A31 and ATI AT528NC & AT526NC n-core ||Speakers: Procella P8 LCR, Procella P5/P5 in-wall
Subs: JTR Captivator subs: One S2, Two RS2, One S1
Screen: 2.40:1 Seymour XD Acoustically Transparent, 128" diagonal / 118" wide || Projector: JVC X570/RS420
farsider3000 is offline  
post #13407 of 13681 Old 10-13-2019, 07:31 AM
AVS Forum Special Member
 
Jeff Permanian's Avatar
 
Join Date: Jun 2007
Location: Wisconsin
Posts: 1,374
Mentioned: 167 Post(s)
Tagged: 0 Thread(s)
Quoted: 910 Post(s)
Liked: 2031
Quote:
Originally Posted by farsider3000 View Post
Jeff,

I used a cheater plug to test for ground loop hum and it had no effect. I will plug into the same outlet as my S2 and see what happens but it’s not going to make any difference.

Not sure where they were tested but if it was not in a soundproofed room of some sort you would not be able to hear it.

Sent from my iPhone using Tapatalk Pro
Sent us an email and we'll get the noise sorted out.

I put my ear right up against every single woofer of every single subwoofer that ships.
chucky7, tebling, serith and 5 others like this.
Jeff Permanian is offline  
post #13408 of 13681 Old 10-13-2019, 06:01 PM
AVS Forum Special Member
 
farsider3000's Avatar
 
Join Date: Jan 2012
Location: Houston, Texas
Posts: 1,989
Mentioned: 12 Post(s)
Tagged: 0 Thread(s)
Quoted: 1613 Post(s)
Liked: 1005
On the positive side I have the single RS2 hooked up and it does add that missing low frequency power I was looking for. But the Seaton felt a little “quicker” with what sounds like more ability to “stop”..

I have not set up my DSP for the RS2 so it should only improve from here. I will also see what audyssey does wi Th it but generally I turn audyssey off and just use my DSP to add PEQ filters.

Some gunshots, like the first gunshot in Blade Runner 20149, sound a bit too tubby (bloated bottom end) right now.

But boy do I have low end in spades with five of the 7 JTR 18” woofers engaged (one RS2 not set up yet).

My thought on the amp is that it’s not defective but it just has low SPL hum. From about seven feet away it is not audible due to the fan on my projector. When the projector is off I can hear it, faintly, from that distance.


Sent from my iPhone using Tapatalk Pro

7.4.6 system: Processors:Marantz 8805 || Xilica XP4080 Amps: Parasound A31 and ATI AT528NC & AT526NC n-core ||Speakers: Procella P8 LCR, Procella P5/P5 in-wall
Subs: JTR Captivator subs: One S2, Two RS2, One S1
Screen: 2.40:1 Seymour XD Acoustically Transparent, 128" diagonal / 118" wide || Projector: JVC X570/RS420
farsider3000 is offline  
post #13409 of 13681 Old 10-13-2019, 06:24 PM
Member
 
Join Date: Mar 2016
Posts: 156
Mentioned: 13 Post(s)
Tagged: 0 Thread(s)
Quoted: 62 Post(s)
Liked: 275
Are you receptacles all on the same phase exiting your fuse panel?
flat4 is offline  
post #13410 of 13681 Old 10-14-2019, 03:50 PM
AVS Forum Special Member
 
chucky7's Avatar
 
Join Date: Apr 2002
Location: Rancho Cucamonga, CA
Posts: 4,774
Mentioned: 310 Post(s)
Tagged: 0 Thread(s)
Quoted: 3632 Post(s)
Liked: 4761
Just saw this on JTR Facebook:

serith, toddct, Dave Ol and 2 others like this.

Speakers: L/C/R: JTR Noesis 212HT. Surrounds: Jamo C103, KEF Q100, Polk Audio RTiA3.
Subwoofer: JTR Captivator 4000ULF.
AVR: Denon AVR-X4400H. TV: Samsung UN75NU8000FXZA.

FS: Jamo C103, KEF Q100 and Polk RTiA3
chucky7 is online now  
Sponsored Links
Advertisement
 
Reply Subwoofers, Bass, and Transducers

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page


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