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post #3421 of 3435 Unread 02-02-2016, 09:48 AM
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Quote:
Originally Posted by Mixdoctor View Post
Wish it was that easy. I also have Dual LMS Ultras on my rear outputs. Their delay is fine at almost 7ft, coming from the receiver. I only need external delay for the HS24 in the rear. I might be able to make do with the 7.5ms delay. I noticed when adding delay on top of the receiver delay I still seem to need almost the same delay as if the receiver was not there......weird.
Unfortunately, you may be faced with a compromise. Only measurements will reveal whether it is a reasonable compromise.
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post #3422 of 3435 Unread 02-02-2016, 10:31 AM
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Quote:
Originally Posted by AustinJerry View Post
We are talking about the delay between the subs, not between the subs and the mains. While I have never tried it, if the OP has an AVR with two independently-configurable sub outputs (like with Audyssey XT32), then augmenting the delays with the AVR might work. Place the two Submersives (assumed equidistant) on one channel, and near-field sub on the other channel. Connect each sub channel to a separate input on the 2x4. Use a plug-in that maintains separate input channels, and this might work.
Sorry, my mistake. The theory still holds though. He still might be able to play with the numbers on all the other speakers and subs to compensate. Or if it's that critical I guess he can daisy chain a second unit in there to add more delays.
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post #3423 of 3435 Unread 02-02-2016, 10:34 AM
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Bummer, more stuff to take into consideration.
I am getting ready to install two Infinite Baffle manifolds in my living room, each of which will require different delays because they are different distances to the MLP.
These manifolds are not going to be able to be moved once installed.
Is the issue that there is a global delay that the 2x4 introduces when installed in the system?
And to fix, you have to play with the delays inside the 2x4, and possibly in the upstream AVR as well?
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post #3424 of 3435 Unread 02-02-2016, 10:34 AM
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**double post**
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post #3425 of 3435 Unread 02-02-2016, 11:23 AM
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Originally Posted by Mr. Electric Wiz View Post
Bummer, more stuff to take into consideration.
I am getting ready to install two Infinite Baffle manifolds in my living room, each of which will require different delays because they are different distances to the MLP.
These manifolds are not going to be able to be moved once installed.
Is the issue that there is a global delay that the 2x4 introduces when installed in the system?
And to fix, you have to play with the delays inside the 2x4, and possibly in the upstream AVR as well?
No. Each of four outputs has its own unique delay. So, you would measure the physical distance from each sub's speaker dust cap to the MLP (exactly where your ears will be). Pick the furthest sub distance. Subtract the distance of the closest sub. Divide the result (in inches) by 13,512 and multiply the result by 1,000 to get the delay in ms. Apply that delay to the closest speaker. Repeat for any other speakers.

Example" Sub1 @ 12'1", Sub2 @ 4'3.5". Diff=93.5". (93.5/13512)*1000=6.9ms

As long as the calculated delay is 7.5ms or smaller, you are good to go.
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post #3426 of 3435 Unread 02-02-2016, 11:28 AM
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Jerry, have you ever had to reach out to MiniDSP support?
I sent them an email yesterday about my wiring question and they still haven't gotten back to me.
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post #3427 of 3435 Unread 02-02-2016, 11:41 AM
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Quote:
Originally Posted by Mr. Electric Wiz View Post
Jerry, have you ever had to reach out to MiniDSP support?
I sent them an email yesterday about my wiring question and they still haven't gotten back to me.
Yes. They are typically very responsive. There is a time difference, though.
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post #3428 of 3435 Unread 02-03-2016, 07:19 PM
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**double post again**

Last edited by Mr. Electric Wiz; 02-04-2016 at 06:53 AM.
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post #3429 of 3435 Unread 02-03-2016, 07:19 PM
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MiniDSP

Well I decided to go ahead and wire up my RCA cables to the input side as follows:
Pin = "+" on MiniDSP
Ring = "-" on MiniDSP
Jumper "-" to "S" on MiniDSP
I've seen at least a couple of photos of them wired up this way, so hopefully it's correct.

Last edited by Mr. Electric Wiz; 02-03-2016 at 07:45 PM.
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post #3430 of 3435 Unread 02-03-2016, 07:44 PM
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Quote:
Originally Posted by Mr. Electric Wiz View Post
Well I decided to go ahead and wire up my RCA cables as follows:
Pin = "+" on MiniDSP
Sleeve = "-" on MiniDSP
Jumper "-" to "S" on MiniDSP
I've seen at least a couple of photos of them wired up this way.
is that on the input or the output ?
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post #3431 of 3435 Unread 02-03-2016, 07:45 PM
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Input. I should have specified.
I put XLR's on the outputs.
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post #3432 of 3435 Unread 02-03-2016, 07:52 PM
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Quote:
Originally Posted by Mr. Electric Wiz View Post
Input. I should have specified.
I put XLR's on the outputs.
lol! Good Good !! Was going to say, doing that on the output well, not a good idea.. !
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post #3433 of 3435 Unread Yesterday, 07:41 AM
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I finally hooked everything up including the IB manifolds yesterday to confirm that everything worked.
IT DID!!!
A multimeter hasn't been placed on the sub output of my Pioneer Elite SC-65 yet to measure output voltage yet, but I presume it will probably be less than 2 volts.
I'm sure the input jumpers will need to be set at the lower voltage (2V- what's listed on the board or 1.8V per the manual).
The output from the MiniDSP was kind of low, and in order to get the first lights to light up on the iNuke 3000 I had to crank the gain knobs (RCA input/XLR output).
Output of course was low because the front and rear waves were cancelling each other out.
Now I just need to install these manifolds!

One thing I'm not sure about is that I have two Sub outputs on my receiver but they are basically the same signal internally connected together (think Y adapter).
I could bring both signals into the MiniDSP connected to Input 1 and 2, or just connect input 1.
I don't think it will matter actually. I'll have to try both and see what changes (if anything).
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post #3434 of 3435 Unread Yesterday, 07:47 AM
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Pics!
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post #3435 of 3435 Unread Today, 12:44 PM
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Cables are done....
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