Official JTR Orbit Shifter Subwoofer Thread - Page 52 - AVS Forum | Home Theater Discussions And Reviews
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post #1531 of 1628 Old 11-13-2015, 12:21 AM
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Hi Jeff,
The new Amp looks nice and does have new features, is it also available for 230 Volts ( european market )?
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post #1532 of 1628 Old 11-18-2015, 03:57 PM
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Hi Jeff,
The new Amp looks nice and does have new features, is it also available for 230 Volts ( european market )?
Yes, we have a 240V version available.
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post #1533 of 1628 Old 11-20-2015, 09:16 AM
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Orbit Shifter LFU test on Data Bass: http://www.data-bass.com/data?page=system&id=123
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post #1534 of 1628 Old 11-20-2015, 09:24 AM
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Results look fantastic! I really wish we could have seen an in room test as well to see what the horn can muster down below its knee. That's a lot of work though.

Two of these bad boys would make some thunder!
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post #1535 of 1628 Old 11-21-2015, 10:48 AM
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Here is what the bass response looks like in my room with three OS LFU. The room is about 3500 cu ft. The subs are almost completely uncorrected except for delay control. I only have one filter at 70hz of -4dB and a Q of about 4 or 5 and that is it! We have hit 136dB @ MLP during some heavy bass scenes. In room response really improves below 40hz compared to outdoor.
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post #1536 of 1628 Old 11-21-2015, 03:50 PM
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I was there to measure that 136db and it was brutal!

Probably the most visceral HT experience I've had since two of the subs were close enough to my seat to touch them.
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post #1537 of 1628 Old 11-21-2015, 05:47 PM
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^Luke that was probably the loudest I have ever driven the system with that Cream Blu Ray video. I still need to get that video. I felt beat up that day when we were finished. That was really great that you had a mic that could handle those levels. My Galaxy runs out at 130. Still need to make it out to Minnesota sometime to hear you setup. Those mains you built look incredible and I see you are building different subs too.
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post #1538 of 1628 Old 11-22-2015, 02:49 PM
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^Luke that was probably the loudest I have ever driven the system with that Cream Blu Ray video. I still need to get that video. I felt beat up that day when we were finished. That was really great that you had a mic that could handle those levels. My Galaxy runs out at 130. Still need to make it out to Minnesota sometime to hear you setup. Those mains you built look incredible and I see you are building different subs too.
I'm thrilled with the new mains and might have the (8) 21s up and running as soon as next week. Definitely let me know if you're ever in the area!

Dude, if your meter can only measure 130db that's not very useful for your insane system.
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post #1539 of 1628 Old 11-29-2015, 11:34 AM
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We've just announced Cyber Monday deals.
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post #1540 of 1628 Old 11-30-2015, 07:38 PM
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I took the plunge and just sent payment for 2 OS LFUs for my 5000 cu ft theater room. I've never gotten the visceral feeling from my dual Epik Empires, but I have a feeling I'm going to find what I've been missing with the OS LFUs!
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post #1541 of 1628 Old 11-30-2015, 08:03 PM
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Originally Posted by PianoProdigy View Post
I took the plunge and just sent payment for 2 OS LFUs for my 5000 cu ft theater room. I've never gotten the visceral feeling from my dual Epik Empires, but I have a feeling I'm going to find what I've been missing with the OS LFUs!
I'll say!!

For example at 25 hz you'll be getting 17 more db's.

So 2 OS's would be like having 16 Empires.

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post #1542 of 1628 Old 11-30-2015, 08:38 PM
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Quote:
Originally Posted by carp View Post
Quote:
Originally Posted by PianoProdigy View Post
I took the plunge and just sent payment for 2 OS LFUs for my 5000 cu ft theater room. I've never gotten the visceral feeling from my dual Epik Empires, but I have a feeling I'm going to find what I've been missing with the OS LFUs!
I'll say!!

For example at 25 hz you'll be getting 17 more db's.

So 2 OS's would be like having 16 Empires.

Wow, is it really that extreme? For some reason, I thought I remembered reading long ago that adding a duplicate sub was a 3 db increase. So if one OS compared to one Empire is a 17 db difference. Wouldn't that hold true no matter how many were added (assuming my rule of thumb is correct, which perhaps it's not)? Then using the same likely-errant math of mine, it would "only" take 8 Empires to makeup the db difference of 2 OS?

Just trying to learn and understand.
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post #1543 of 1628 Old 12-01-2015, 04:34 AM
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Quote:
Originally Posted by PianoProdigy View Post
Wow, is it really that extreme? For some reason, I thought I remembered reading long ago that adding a duplicate sub was a 3 db increase. So if one OS compared to one Empire is a 17 db difference. Wouldn't that hold true no matter how many were added (assuming my rule of thumb is correct, which perhaps it's not)? Then using the same likely-errant math of mine, it would "only" take 8 Empires to makeup the db difference of 2 OS?

Just trying to learn and understand.

I can't wait to get these to you and hear what you think.


You gain 6db everytime you double the amount.
2 = +6db
4= +12db
8= +18db
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post #1544 of 1628 Old 12-01-2015, 06:23 AM
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Quote:
Originally Posted by PianoProdigy View Post
Wow, is it really that extreme? For some reason, I thought I remembered reading long ago that adding a duplicate sub was a 3 db increase. So if one OS compared to one Empire is a 17 db difference. Wouldn't that hold true no matter how many were added (assuming my rule of thumb is correct, which perhaps it's not)? Then using the same likely-errant math of mine, it would "only" take 8 Empires to makeup the db difference of 2 OS?

Just trying to learn and understand.
If you added a second sub and split the power from the amp - 1/2 power to the first sub and 1/2 power to the second sub - then you would gain 3 db's but no one does that.
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post #1545 of 1628 Old 12-01-2015, 09:54 AM
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Quote:
Originally Posted by PianoProdigy View Post
I took the plunge and just sent payment for 2 OS LFUs for my 5000 cu ft theater room. I've never gotten the visceral feeling from my dual Epik Empires, but I have a feeling I'm going to find what I've been missing with the OS LFUs!
I would say the general consensus is your in for a wild ride! Now, I dont know what speakers you are using but, finding some nice high efficiency speakers like JTR 228 or 212s will allow you to really see what the OS's can offer. Be sure to put the ear plugs in and make sure your pictures are mounted sturdy on the wall haha
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post #1546 of 1628 Old 12-01-2015, 10:39 AM
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Quote:
Originally Posted by PianoProdigy View Post
I took the plunge and just sent payment for 2 OS LFUs for my 5000 cu ft theater room. I've never gotten the visceral feeling from my dual Epik Empires, but I have a feeling I'm going to find what I've been missing with the OS LFUs!
If your subs don't scare you, then you don't have the right ones.

These put fear in the hearts of men... and then you develop Stockholm syndrome...It's all nervous grins and glee after that.
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post #1547 of 1628 Old 12-01-2015, 10:50 AM
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The L&R are Energy RC-70s powered by an Emotiva XPA-3. I have a dual Energy RC-LCRs as my centers which are also both amplified by channels on one of the XPA-3s. Surrounds are also Energy towers (also on the XPA-3s) and Rear Surrounds are Energy surrounds on a less-beefy amplifier.

Emotiva XMC-1 is the processor.

My speakers are nothing like the JTR offerings, but I hope they will suffice.

Quick photo. Excuse the Pottery Barn warehouse of cushions, the theater is a staging area for the outdoor living area and pool furniture while everything is under construction.

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post #1548 of 1628 Old 12-03-2015, 05:31 PM
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^I think you will really be impressed with the OS. I also had an Empire before getting the OS. I think the 212HTR is the perfect match for them but one thing at a time. Enjoy and let us know your impression.
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post #1549 of 1628 Old 12-20-2015, 07:35 AM
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Any tips of getting these beasts up a flight of wood stairs? I've used straps like these to move a very heavy dresser (around 165 lbs) with my father in law, and while it made it easier, it was still tough and these subs are going to be another 60 lbs heavier. The dresser was more awkward since it was short and long. So, any suggestions?
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post #1550 of 1628 Old 12-20-2015, 08:37 AM
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A refrigerator dolly should work great, they are built to go up stairs.

It takes lots of abnormal people to make things easy for normal people.
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post #1551 of 1628 Old 12-26-2015, 06:27 PM
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4 people with 2 sets of "TeamStraps" and we got them up the narrow stairs and into place in the theater room relatively easily tonight. Going to run Dirac Live on my XMC-1 shortly and start listening.



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post #1552 of 1628 Old 12-26-2015, 08:20 PM
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Subs are in place. Outgoing Epik Empire for reference. Is there supposed to be this much hum? I started with the gain in the middle and it was ridiculously loud. I currently have it turned down to maybe 25% and when paused, the hum is noticeable at the listening position but obviously not when playing.

Edit: I am using RCA cables run through the wall during construction. I tried another RCA cable outside the wall and the hum was the same. I have no XLR cables at home. There was hum present with the Empires but not nearly as noticeable, perhaps just due to the horn design and greater amplification? I guess I can order some XLR cables and use the balanced outputs on my XMC-1 and see if the hum resolves or greatly diminishes as a first step? If it makes a huge difference, I guess I will a figure a way to run them so they aren't visible for the finished installation.

Edit 2: I love Amazon Same Day. I went ahead and ordered XLR cables. They will be here tomorrow, and I'll swap the cables and hope for no hum and report back.


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post #1553 of 1628 Old 12-26-2015, 09:21 PM
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Quote:
Originally Posted by PianoProdigy View Post
Subs are in place. Outgoing Epik Empire for reference. Is there supposed to be this much hum? I started with the gain in the middle and it was ridiculously loud. I currently have it turned down to maybe 25% and when paused, the hum is noticeable at the listening position but obviously not when playing.

Edit: I am using RCA cables run through the wall during construction. I tried another RCA cable outside the wall and the hum was the same. I have no XLR cables at home. There was hum present with the Empires but not nearly as noticeable, perhaps just due to the horn design and greater amplification? I guess I can order some XLR cables and use the balanced outputs on my XMC-1 and see if the hum resolves or greatly diminishes as a first step? If it makes a huge difference, I guess I will a figure a way to run them so they aren't visible for the finished installation.

Edit 2: I love Amazon Same Day. I went ahead and ordered XLR cables. They will be here tomorrow, and I'll swap the cables and hope for no hum and report back.


Mine had a hum every time I had the minidsp connected. After moving the minidsp to the same outlet as my receiver, the hum went away.
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post #1554 of 1628 Old 12-26-2015, 09:40 PM
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Mine had a hum every time I had the minidsp connected. After moving the minidsp to the same outlet as my receiver, the hum went away.
Thanks for the feedback. The signal is going straight from the receiver to the subs, no minidsp at this point.
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post #1555 of 1628 Old 12-27-2015, 06:39 AM
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Quote:
Originally Posted by PianoProdigy View Post
Subs are in place. Outgoing Epik Empire for reference. Is there supposed to be this much hum? I started with the gain in the middle and it was ridiculously loud. I currently have it turned down to maybe 25% and when paused, the hum is noticeable at the listening position but obviously not when playing.

Edit: I am using RCA cables run through the wall during construction. I tried another RCA cable outside the wall and the hum was the same. I have no XLR cables at home. There was hum present with the Empires but not nearly as noticeable, perhaps just due to the horn design and greater amplification? I guess I can order some XLR cables and use the balanced outputs on my XMC-1 and see if the hum resolves or greatly diminishes as a first step? If it makes a huge difference, I guess I will a figure a way to run them so they aren't visible for the finished installation.
Mine had a really bad hum when I first got them, turned out to be improper grounding of my cable outside from Comcast. I took a small piece of wire and grounded it and my hum completely went away. I have tried setting the gain as high as 3/4 of the way up with no hum but I usually just keep them at about 50% now. I should have the same new amp as you BTW.
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post #1556 of 1628 Old 12-27-2015, 06:39 AM
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Thanks for the feedback. The signal is going straight from the receiver to the subs, no minidsp at this point.
You more than likely have a ground loop going on. As a test trying using a cheater plug on the subwoofer power cable and see if it goes away.
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post #1557 of 1628 Old 12-27-2015, 06:45 AM
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turn them around so the mouth is facing the wall
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post #1558 of 1628 Old 12-27-2015, 08:44 AM
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Quote:
Originally Posted by PianoProdigy View Post
Subs are in place. Outgoing Epik Empire for reference. Is there supposed to be this much hum? I started with the gain in the middle and it was ridiculously loud. I currently have it turned down to maybe 25% and when paused, the hum is noticeable at the listening position but obviously not when playing.
There is a silver toggle switch on the new amplifier that needs to be positioned towards the input that you are using.
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post #1559 of 1628 Old 12-27-2015, 09:09 AM
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Quote:
Originally Posted by Jeff Permanian View Post
Quote:
Originally Posted by PianoProdigy View Post
Subs are in place. Outgoing Epik Empire for reference. Is there supposed to be this much hum? I started with the gain in the middle and it was ridiculously loud. I currently have it turned down to maybe 25% and when paused, the hum is noticeable at the listening position but obviously not when playing.
There is a silver toggle switch on the new amplifier that needs to be positioned towards the input that you are using.
Jeff, I saw that referenced in another post, but it made no difference unfortunately.
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post #1560 of 1628 Old 12-27-2015, 09:11 AM
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Quote:
Originally Posted by jaimectrs View Post
Quote:
Originally Posted by PianoProdigy View Post
Subs are in place. Outgoing Epik Empire for reference. Is there supposed to be this much hum? I started with the gain in the middle and it was ridiculously loud. I currently have it turned down to maybe 25% and when paused, the hum is noticeable at the listening position but obviously not when playing.

Edit: I am using RCA cables run through the wall during construction. I tried another RCA cable outside the wall and the hum was the same. I have no XLR cables at home. There was hum present with the Empires but not nearly as noticeable, perhaps just due to the horn design and greater amplification? I guess I can order some XLR cables and use the balanced outputs on my XMC-1 and see if the hum resolves or greatly diminishes as a first step? If it makes a huge difference, I guess I will a figure a way to run them so they aren't visible for the finished installation.
Mine had a really bad hum when I first got them, turned out to be improper grounding of my cable outside from Comcast. I took a small piece of wire and grounded it and my hum completely went away. I have tried setting the gain as high as 3/4 of the way up with no hum but I usually just keep them at about 50% now. I should have the same new amp as you BTW.
I have FIOS where the fiber goes into the ONT and from there comes the coax. I'll take a look at that amongst the other suggestions.
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