Official JTR Speakers Subwoofer Thread - Page 486 - AVS Forum | Home Theater Discussions And Reviews
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post #14551 of 15332 Old 04-08-2020, 12:55 AM
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Crown puts out this publication, Amplifier Application Guide that is pretty through for various best-practices in hooking up to their amps based on whether the source is three-prong or 2 and balanced vs. unbalanced for a huge array of different connectors.
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File Type: pdf Crown Amp Guide-p7,8.pdf (451.0 KB, 28 views)
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post #14552 of 15332 Old 04-08-2020, 04:34 AM
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i know this is jtr subwoofer thread but check out Jeff monster 2ch speaker setup:


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post #14553 of 15332 Old 04-08-2020, 07:13 AM
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Quote:
Originally Posted by giomania View Post
Quote:
Originally Posted by zeus33 View Post
Yeah, lots of conflicting info on the correct wiring for RCA to XLR from reputable sources.

As far as your issue, one of the DIY guys was having a noise issue and IIRC, he grounded the chassis of the Mini to his amp and it fixed the issue. I know lots of people have had some noise and ground their AVR/Pre to their sub amps and it works. Don't know if it will help, but it's worth a shot. Good luck.
Not the same thing, but I tried grounding the case to the AVP via a wire connected to the miniDSP case screw to the AVP Phono ground. I also have a ground wire connected to the Phono ground that connects to the electrical isolated ground. This did not make a difference. I am thinking to make the gain adjustments to reduce the noise.

I wish there was a true balanced miniDSP as capable as the 2x4 HD.

Mark
Is the miniDSP 10x10HD truly balanced? I think it does a bit better than the miniDSP 2x4HD but definitely a lot more expensive.

Main: 3 x JTR 212RT | Surrounds: 2 x JTR 110HT | Subwoofer: 1 x JTR Captivator 4000ULF-LP | 2 x Crowson Motion Actuators w/ Crown DSi 4000
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post #14554 of 15332 Old 04-08-2020, 08:21 AM
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Originally Posted by pitchcut29 View Post
Is the miniDSP 10x10HD truly balanced? I think it does a bit better than the miniDSP 2x4HD but definitely a lot more expensive.
There are some limitations present in the 10x10HD that are not there in the 2x4HD which is why most are still running the latter. I forget off hand what they all are but perhaps somebody else can chime in. I know one limitation was delay adjustment.
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post #14555 of 15332 Old 04-08-2020, 09:39 AM
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Originally Posted by femi View Post
i know this a jtr subwoofer thread but check out Jeff monster 2ch speaker setup:
Femi
+5 LS at 120Hz for speakers with bass bumped up +5, Why? Cuz Jeff can . I heard the JTR 215 speakers pair in Sacramento a long while back. This speaker can play EXTREMELY LOUD, but that is not its only strength (Big JBL also can). It has more low deep bass than most subs, plus the midbass from these is out of this world chest punchy. The mid range and vocal are crystal clear. It was quite a surprising experience.
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post #14556 of 15332 Old 04-08-2020, 01:33 PM
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Any suggestions for a 3rd subwoofer to add to my HT under construction. It will be 9.2.4 Atmos in a sealed/acoustically treated 2500 cu feet space. There are two JL Audio f113 (v2) sealed subs that must sit in the front two corners.

I would like to add a 3rd subwoofer along the back wall (probably mid point or a corner). I am leaning towards a sealed sub as this will integrate with the sealed JL Audio's. Suggestions?
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post #14557 of 15332 Old 04-08-2020, 02:59 PM
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I am leaning towards a sealed sub as this will integrate with the sealed JL Audio's. Suggestions?

Considering you're in the JTR thread, an RS1 or RS2 would be your options. Both excellent choices. Both will dig much deeper than the JLs.
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post #14558 of 15332 Old 04-08-2020, 03:32 PM
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Originally Posted by zeus33 View Post
Considering you're in the JTR thread, an RS1 or RS2 would be your options. Both excellent choices. Both will dig much deeper than the JLs.

Thanks for the recommendation.

How does RS2 compare to Rythmik G25HP: dual opposed 15”, servo controlled, sealed subs? They are releasing a G28HP soon as well (dual 18”).

Is the Rythmik design/performance superior in terms of lower distortion, since they are direct opposed and have servo control (I do not think JTR has this technology but I may be wrong)? I realize I am asking this on JTR forum but I still value everyone’s opinion here !
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post #14559 of 15332 Old 04-08-2020, 03:37 PM
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Originally Posted by blake View Post
Thanks for the recommendation.

How does RS2 compare to Rythmik G25HP: dual opposed 15”, servo controlled, sealed subs? They are releasing a G28HP soon as well (dual 18”).

Is the Rythmik design/performance superior in terms of lower distortion, since they are direct opposed and have servo control (I do not think JTR has this technology but I may be wrong)? I realize I am asking this on JTR forum but I still value everyone’s opinion here !
I think @muscles will be best placed to share his thoughts since he has owned the G25HP and has the RS1s now

Subwoofers: Dual Rythmik FV18s Rev2 with Paper cone, BOSS Platform mini riser, 2 BK LFE
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post #14560 of 15332 Old 04-08-2020, 03:58 PM
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Output wise, you probably need a g42 to be able to compare to the rs2. ATM, JTR does not offer DO Sub. Sound quality wise, they are different with the JTR/Rythmik I have heard. Depends on your preference, what you like might be different than what I like. Sorry for not much help here.
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post #14561 of 15332 Old 04-08-2020, 09:24 PM
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I think @muscles will be best placed to share his thoughts since he has owned the G25HP and has the RS1s now
I've actually owned the JL F113 Fathoms, G25HPs, and the RS1's! Whoot! Hat trick. I will say this if you are using this primarily for movies go with an RS1, I would say an RS1 has about as much output or maybe a bit more than a G25HP. The RS1 has a sound similar to a JL Audio, high excursion woofer with a ton of power. If you are using this for music, I would get the G25HP. You just can't believe how clean a sub can sound until you've heard one of these. It will pick up every nuance of the bass with a ton of high speed separation.

If space is an issue the RS1 is the highest output sub you can find for the smallest size (not footprint, just overall size Chucky hehe). If you need even more output get the RS2. I don't even want to try to calculate how many F113's it would take to equal its output.

Let me know if there is anything else i missed, or if you have questions.

Greg
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Subwoofers: Dual JTR RS1's - SB13 Ultra (bedroom)
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post #14562 of 15332 Old 04-08-2020, 10:21 PM
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I've actually owned the JL F113 Fathoms, G25HPs, and the RS1's! Whoot! Hat trick. I will say this if you are using this primarily for movies go with an RS1, I would say an RS1 has about as much output or maybe a bit more than a G25HP. The RS1 has a sound similar to a JL Audio, high excursion woofer with a ton of power. If you are using this for music, I would get the G25HP. You just can't believe how clean a sub can sound until you've heard one of these. It will pick up every nuance of the bass with a ton of high speed separation.

If space is an issue the RS1 is the highest output sub you can find for the smallest size (not footprint, just overall size Chucky hehe). If you need even ore output get the RS2. I don't even want to try to calculate how many F113's it would take to equal its output.

Let me know if there is anything else i missed, or if you have questions.

Greg
Awwwww.... You remembered!
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post #14563 of 15332 Old 04-08-2020, 10:27 PM
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If you need even more output get the RS2. I don't even want to try to calculate how many F113's it would take to equal its output.


Greg


With the 20Hz HPF JL employ on the Fathoms - I'd guess under 15Hz it would be somewhere around ∞ lol - Above 80Hz it would be a [email protected] too!

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post #14564 of 15332 Old 04-08-2020, 11:19 PM
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Quote:
Originally Posted by muscles View Post
I've actually owned the JL F113 Fathoms, G25HPs, and the RS1's! Whoot! Hat trick. I will say this if you are using this primarily for movies go with an RS1, I would say an RS1 has about as much output or maybe a bit more than a G25HP. The RS1 has a sound similar to a JL Audio, high excursion woofer with a ton of power. If you are using this for music, I would get the G25HP. You just can't believe how clean a sub can sound until you've heard one of these. It will pick up every nuance of the bass with a ton of high speed separation.

If space is an issue the RS1 is the highest output sub you can find for the smallest size (not footprint, just overall size Chucky hehe). If you need even more output get the RS2. I don't even want to try to calculate how many F113's it would take to equal its output.

Let me know if there is anything else i missed, or if you have questions.

Greg

Thanks for this comparison ! Interesting that you owned one sub I have (JL) and two I am debating between.

I think the RS2 would be a good fit for what I need and my space. I am 20% music usage but I think it will be more than capable for tight fast bass for music and movie soundtracks. Do you think you lose any of that going from RS1 to RS2 , or is it simply more dB with no down side ?

The only question I have is the upcoming G28HP from Rythmik. I wonder how this will compare with RS2 - more of a level playing field given they both have dual 18” drivers.
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post #14565 of 15332 Old 04-08-2020, 11:39 PM
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Thanks for this comparison ! Interesting that you owned one sub I have (JL) and two I am debating between.

I think the RS2 would be a good fit for what I need and my space. I am 20% music usage but I think it will be more than capable for tight fast bass for music and movie soundtracks. Do you think you lose any of that going from RS1 to RS2 , or is it simply more dB with no down side ?
There is ONLY gain going from the RS1 to RS2 (well there is a loss of $$$ lol) An RS2 will not only play louder than an RS1 - but if played at the same volume - it will do so with much lower distortion
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post #14566 of 15332 Old 04-08-2020, 11:44 PM
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Originally Posted by blake View Post
Thanks for this comparison ! Interesting that you owned one sub I have (JL) and two I am debating between.

I think the RS2 would be a good fit for what I need and my space. I am 20% music usage but I think it will be more than capable for tight fast bass for music and movie soundtracks. Do you think you lose any of that going from RS1 to RS2 , or is it simply more dB with no down side ?

The only question I have is the upcoming G28HP from Rythmik. I wonder how this will compare with RS2 - more of a level playing field given they both have dual 18” drivers.
I can't comment on the RS2 because I have never owned/heard it. I could theoretically make the claim that it sounds the same, same driver, same amp manufacturer (4000 watts though). I would say JTR would sound most like JL Audio, the Rythmik has its own sound that is super fast and tight, I am not saying you can't get them to work together nicely, its just a much different sound. If you are only 20% music, get an RS2 you will not believe how much better it is than your more expensive JL F113 Fathom. It is a big heavy, sub though. Keep that in mind.

Greg
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post #14567 of 15332 Old 04-08-2020, 11:47 PM
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Originally Posted by blake View Post
Thanks for this comparison ! Interesting that you owned one sub I have (JL) and two I am debating between.

I think the RS2 would be a good fit for what I need and my space. I am 20% music usage but I think it will be more than capable for tight fast bass for music and movie soundtracks. Do you think you lose any of that going from RS1 to RS2 , or is it simply more dB with no down side ?

The only question I have is the upcoming G28HP from Rythmik. I wonder how this will compare with RS2 - more of a level playing field given they both have dual 18” drivers.
The G28HP probably will be more equal in output to the RS1. It comes down to sound signature, and weight. The G28 will probably weigh about 220 pounds. I suspect most music leaning people would be happy with either.

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post #14568 of 15332 Old 04-09-2020, 03:47 AM
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Anyone know if a member is running an OSPro in their HT?
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post #14569 of 15332 Old 04-09-2020, 06:12 AM
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Anyone know if a member is running an OSPro in their HT?
@N8DOGG has two JTR OS pros in his theater.
Check out his amazing theater here: https://www.avsforum.com/forum/19-de...m-finally.html

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post #14570 of 15332 Old 04-09-2020, 09:19 AM
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Originally Posted by muscles View Post
I've actually owned the JL F113 Fathoms, G25HPs, and the RS1's! Whoot! Hat trick. I will say this if you are using this primarily for movies go with an RS1, I would say an RS1 has about as much output or maybe a bit more than a G25HP. The RS1 has a sound similar to a JL Audio, high excursion woofer with a ton of power. If you are using this for music, I would get the G25HP. You just can't believe how clean a sub can sound until you've heard one of these. It will pick up every nuance of the bass with a ton of high speed separation.

If space is an issue the RS1 is the highest output sub you can find for the smallest size (not footprint, just overall size Chucky hehe). If you need even more output get the RS2. I don't even want to try to calculate how many F113's it would take to equal its output.

Let me know if there is anything else i missed, or if you have questions.

Greg
Quote:
Originally Posted by muscles View Post
I can't comment on the RS2 because I have never owned/heard it. I could theoretically make the claim that it sounds the same, same driver, same amp manufacturer (4000 watts though). I would say JTR would sound most like JL Audio, the Rythmik has its own sound that is super fast and tight, I am not saying you can't get them to work together nicely, its just a much different sound. If you are only 20% music, get an RS2 you will not believe how much better it is than your more expensive JL F113 Fathom. It is a big heavy, sub though. Keep that in mind.

Greg
You mentioned you liked the sound of Rythmik over the jtr subs for music applications in the posts. I'm curious why you kept the jtr over rythmiks? Was it the overall output you needed or perhaps watching movies more vs listening to music lately?

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post #14571 of 15332 Old 04-09-2020, 09:48 AM
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You mentioned you liked the sound of Rythmik over the jtr subs for music applications in the posts. I'm curious why you kept the jtr over rythmiks? Was it the overall output you needed or perhaps watching movies more vs listening to music lately?

Several factors actually. Let me start by saying that my decision to keep the RS1 is not because I found it to be the best subwoofer but because it checked the most boxes, but it isn't perfect (for me). I can't really compare them for music because of the 7ms delay in the JTR sub when running it with my McIntosh C2600 (it cannot add delay to L and R channels to match) so it doesn't sound as good as the Rythmik (no DSP delay). Another thing was I would take a bigger hit trying to sell the JTRs and they were newer, Rythmik stuff is pretty easy to sell, its more known than JTR. The last thing is the the footprint of the JTR is much smaller and enables me better options for placement. The JTR does have a lot more output than the F18, I would guess probably 4db or so more across the frequency chart. For my room this is probably the maximum amount of bass it can comfortably handle, it gets scary with how loud these 2 little guys go, truly remarkable.



Couple of side points, I have OCD and having everything match (I have JTR speakers) makes me feel better mentally. This is crazy, I know but its real for me. I also love the way the driver looks, I find it to be the sexiest looking woofer out there, especially with the carbon fiber dust cap and the way she moves when shes putting out sound. I love watching the high excursion woofer dance


Greg
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Subwoofers: Dual JTR RS1's - SB13 Ultra (bedroom)
Speakers: 2xJTR Noesis 212RT 1 210RM - KEF LS50W
Audio:McIntosh C2600 Pre - Marantz SR-8012 -Dual McIntosh 601's - PS Audio M700 - McIntosh MT5 - GoldNotePH10 - Oppo UDP-205 - BlueSound Node 2
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post #14572 of 15332 Old 04-09-2020, 03:37 PM
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Anyone know if a member is running an OSPro in their HT?
DO IT!!!! Best thing Ive ever done in my HT.
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post #14573 of 15332 Old 04-09-2020, 03:47 PM
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DO IT!!!! Best thing Ive ever done in my HT.
I have always wondered about doing this. What are the disadvantages? It doesn't go below like 40hz? I know it has some ridiculous high output for music, but what about movies?

Greg

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Speakers: 2xJTR Noesis 212RT 1 210RM - KEF LS50W
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post #14574 of 15332 Old 04-09-2020, 04:20 PM
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Originally Posted by muscles View Post
I have always wondered about doing this. What are the disadvantages? It doesn't go below like 40hz? I know it has some ridiculous high output for music, but what about movies?

Greg
I only run them to 40hz, then the 24s take 40hz to 5 hz. No blending , just separate xover points and it's by FAR the easiest /best solution in my case. There is just so much firepower that both are not needed to run over each other.

Disadvantages? Nothing other than size and their tune I guess.

But for movies? It has good output to 25hz in room. But above 35 hz or so, it's scary. Right now, I have them running on a crest 7.5 at 1/4 gain, -12 on the processor and they will still blast you out of the room. It's chest thumping, feels like your In a car bass lol. They are just so damn impressive!
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post #14575 of 15332 Old 04-09-2020, 04:43 PM
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Originally Posted by blake View Post
Any suggestions for a 3rd subwoofer to add to my HT under construction. It will be 9.2.4 Atmos in a sealed/acoustically treated 2500 cu feet space. There are two JL Audio f113 (v2) sealed subs that must sit in the front two corners.

I would like to add a 3rd subwoofer along the back wall (probably mid point or a corner). I am leaning towards a sealed sub as this will integrate with the sealed JL Audio's. Suggestions?
Step 1: Buy a JTR S1 or S2. Or Rythmik G25HP. Or PSA S18 IPAL or S36 IPAL.

Step 2: Be blown away

Step 3: Sell the JL's and add another two of whichever of the above subs you purchased.
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post #14576 of 15332 Old 04-09-2020, 05:29 PM
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Originally Posted by muscles View Post
I have always wondered about doing this. What are the disadvantages? It doesn't go below like 40hz? I know it has some ridiculous high output for music, but what about movies?
The OS can be heard from a block away - literally - but given your history and past issues with the HOA do you really need that kind of hassle?
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If you take yourself too seriously expect me to do the exact opposite.

BTW, did you really need to quote the entire post?
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post #14577 of 15332 Old 04-09-2020, 05:35 PM
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Originally Posted by JimWilson View Post
The OS can be heard from a block away - literally - but given your history and past issues with the HOA do you really need that kind of hassle?
Oh, I have all the bass I could want. Sealed subs go louder in room without disturbing the neighbors as much. They just don't have as much horsepower under 20hz. Being on concrete floors that is wasted on me. This could be why I have such a strong bias to sealed designs. They sound better because I don't get the tactile sensations from ported...apparently my neighbors did...4 houses down. The FV25HP's disturbed every single house in my community (only 6 units). Was all set to move to a bigger house with more privacy, but pandemics can put a real damper on things. I have my health, and thankfully also my home theater...it has been so worth the outlay at this point! I don't mind being quarantined at all

Greg

Subwoofers: Dual JTR RS1's - SB13 Ultra (bedroom)
Speakers: 2xJTR Noesis 212RT 1 210RM - KEF LS50W
Audio:McIntosh C2600 Pre - Marantz SR-8012 -Dual McIntosh 601's - PS Audio M700 - McIntosh MT5 - GoldNotePH10 - Oppo UDP-205 - BlueSound Node 2
TV: Samsung 75" Q9FN - Sony 75" 940D
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post #14578 of 15332 Old 04-09-2020, 05:42 PM
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Originally Posted by acribb View Post
I ordered 2x monoprice rca to XLR cables. I will just bite the bullet and pull those after I test them outside the walls to see if the hum goes away.

Like I said, the scenario is this-

On one circuit only a Subwoofer is plugged into this entire circuit. With a subwoofer cable plugged into it and the other end plugged into NOTHING. This monoprice 50 ft rca cable runs up the wall in very close proximity to the subwoofers power romex. I get an extremely loud hum which goes away mostly with my cheater plugs but there is still a low level 60hz hum. I'm hoping the new cables I ordered, these, are better shielded. Speakerpower themselves recommend them.

You are on the right path. Since you have the hum with one end of the cable plugged into the sub and the other (AVR) end unplugged, no isolation transformer is going to help you. Isolation transformers can fix hum caused by ground loops, not noise picked up from surrounding sources through the cable or it's routing.



Your 50 foot cable is essentially a long antenna, picking up noise from around it. Cheap cables with cheap connectors, cheap shielding and/or improper internal connections make it worse.



A higher quality RCA cable might work.


A better route for the cable would help, even with your cheaper existing cable.


Switching to balanced XLR type connection is your best bet. Properly configured, they are more resistant to environmental noise than unbalanced RCA type wiring.
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post #14579 of 15332 Old 04-09-2020, 06:37 PM
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Originally Posted by acribb View Post
Yes I got my 2 Cap 2400s up the stairs by myself by removing the 65lb driver on each. It was not easy getting them out or putting them back in. Luckily my wife plugged in the wire while I held it hovering over the hole.
The one time I removed the woofer in one of my Caps and reinstalled it was not easy. Ive dealt with a ton of woofers and enclosures in my day and that was the hardest woofer to instal into the enclosure. I did it myself. Thats a good idea you had with you wife helping. Next time ill do that.

Jeff told me he wedges a long screwdriver in there some how and kind of pry the woofer either in or out. That 18 is a beast on or off lol.

JTR/JBL/JVC/Denon/Oppo/Monolith/Silver Ticket/Furman/Seatcraft/Acoustimac/AudioQuest/Harrison Labs/Roku
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post #14580 of 15332 Old 04-09-2020, 07:59 PM
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Originally Posted by muscles View Post
Rythmik stuff is pretty easy to sell, it's more known than JTR.
very true. i still can't believe how effortless it was to sell the 5 i've owned. however, at the end of the day i'd rather be satisfied with a product and use/keep it than worry about how well it can resell. JTR feels like the endgame for myself and i'm sure many others here. i've seen very few captivators being sold here in the classifieds section & elsewhere, and it would appear that when it does happen it's either because the person selling is downsizing their theater/moving, or they were upgrading to something more powerful in the family lineup. i don't think i've seen anyone selling because it wasn't powerful enough.

Quote:
Originally Posted by muscles View Post
I also love the way the driver looks, I find it to be the sexiest looking woofer out there, especially with the carbon fiber dust cap and the way she moves when shes putting out sound. I love watching the high excursion woofer dance
i wish i didn't need to hide mine, ugh. maybe i'll take a high resolution picture and tape it over the metal mesh i'm going to put in front of the drivers it's funny that even though 90% of my captivator is hidden from view it still has such a menacing visual presence when it's off, never-mind when it's flexing.
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