or Connect
AVS › AVS Forum › Audio › DIY Speakers and Subs › MiniDSP
New Posts  All Forums:Forum Nav:

MiniDSP - Page 54

post #1591 of 2293
Quote:
Originally Posted by AV Science Sales 5 View Post

Sometimes when I turn on my system (10x10HD is powered on all the time to avoid thump) all channels going through the 10x10HD have no output. I have to connect up the USB cable to my computer and sync it again and then it works fine. Now I can't get it to sync at all. I have powered down the unit before making connections and have tried repeatedly. I have also tried resetting the 10x10HD. No luck. Have pulled the unit from my system and tried to sync it with only USB and power cable connected, still not working. Any suggestions?

MiniDSP is replacing my 10x10HD. Replacement will be here Thursday.
Reply
Reply
post #1592 of 2293
Last summer I bought an unbalanced miniDSP to EQ my 15" LMS-R in 4 ohm mono bridge mode from an EP4000. I was just looking and I realized the miniDSP unbalanced only has a max output of 0.9 V RMS? That means that the EP4000, which has 34 dB gain (50x voltage) can only get FORTY FIVE VOLTS from the miniDSP signal without clipping?!?!? That's only P = V^2/R = 45^2/4 ohms = 506.25 V. So my EP4000 max power output is only 506.25 Volts without clipping?! ..... Please tell me I did the math wrong and the unbalanced is fine for getting the full 2500W RMS out of the 4 ohm bridged mode.

or is it two 2 ohm channels since it's 4 ohm bridged, so it would be P=V^2/R = 45^2/2 = 1012.5 V on each channel so 2025 V RMS total?

I have never had the amps clip lights go on, is it just because I haven't had it loud enough?

If this is a problem, is there a way to fix it with something like an art cleanbox between the minidsp and the ep4000? Would that bring the 0.9V up high enough? It says it has +21dB gain on unbalanced > balanced output but it also says it's only +4dB gain..
post #1593 of 2293
My understanding, it's a brigeable solution. Open the box, change the bridge and voila, you go from 0.9V to 2.0V.

Maybe you can help me. I want to buy and play with an miniDSP and I'm not sure which to buy to compliment our system. My understanding, I want the boxed 2x4 miniDSP and I'm not sure which module to order.

Suggestions?

(when the boxed 2x4 miniDSP is ordered, I'll ask it to be bridged to 2.0v)

We're using a Marantz, SR5007, which is playing into three Klipsch, RW-12d subwoofers. Any upgrades will be into a three subwoofer solution. Does anybody see a problem with asking for the box to be bridged to 2.0V?

Here's the best I could find regarding the 2.0V issue.

-
Edited by BeeMan458 - 5/26/13 at 6:30am
post #1594 of 2293
Quote:
Originally Posted by BeeMan458 View Post

My understanding, it's a brigeable solution. Open the box, change the bridge and voila, you go from 0.9V to 2.0V.

Maybe you can help me. I want to buy and play with an miniDSP and I'm not sure which to buy to compliment our system. My understanding, I want the boxed 2x4 miniDSP and I'm not sure which module to order.

Suggestions?

(when the boxed 2x4 miniDSP is ordered, I'll ask it to be bridged to 2.0v)

We're using a Marantz, SR5007, which is playing into three Klipsch, RW-12d subwoofers. Any upgrades will be into a three subwoofer solution. Does anybody see a problem with asking for the box to be bridged to 2.0V?

Here's the best I could find regarding the 2.0V issue.

-

on the spec sheet for the unbalanced it says 0.9V RMS max, on the spec sheet for the balanced 2x4 it says 2V RMS max. Only the input sensitivity is switchable.
post #1595 of 2293
Quote:
Originally Posted by BeeMan458 View Post

My understanding, it's a brigeable solution. Open the box, change the bridge and voila, you go from 0.9V to 2.0V.

Maybe you can help me. I want to buy and play with an miniDSP and I'm not sure which to buy to compliment our system. My understanding, I want the boxed 2x4 miniDSP and I'm not sure which module to order.

Suggestions?

(when the boxed 2x4 miniDSP is ordered, I'll ask it to be bridged to 2.0v)

We're using a Marantz, SR5007, which is playing into three Klipsch, RW-12d subwoofers. Any upgrades will be into a three subwoofer solution. Does anybody see a problem with asking for the box to be bridged to 2.0V?

Here's the best I could find regarding the 2.0V issue.

-

beeman when I contacted minidsp they suggested the 2x4 balanced with 2.1 advanced plug in. i didnt order it because this does not make sense. I think I need a 2x4 unbalance, 2v input voltage, with 3/4 advanced plugin.
Edited by basshead81 - 5/26/13 at 7:40am
post #1596 of 2293
Quote:
Originally Posted by WagBoss View Post

on the spec sheet for the unbalanced it says 0.9V RMS max, on the spec sheet for the balanced 2x4 it says 2V RMS max. Only the input sensitivity is switchable.

I'm not arguing. I read different. Reads like more research is needed. When I order, it will be for the 2.0V, Rev-B..

(okay, got it. I'm confusing input sensitivity with output voltage)

Quote:
Originally Posted by basshead81 View Post

beeman when I contacted minidsp they suggested the 2x4 balanced with 2.1 advanced plug in. i didnt order it because this does not make sense. I think I need a 2x4 unbalance, 2v input voltage, with 3/4 advanced plugin.

I responded in another thread of yours but I'll repost the link here for everybody's reading pleasure; from Audioholics.

miniDSP's recommendation agrees with the article, or if you will, the article agrees with the folks at miniDSP and will be the unit I order once I can clear it with the card company.

Our AVR doesn't have balanced connections so I would have to go with unbalanced. Maybe I need to go with balanced and use a balance-to-RCA converter so when we upgrade the subs, I can use balanced connectors on the subwoofers. But the sub-out from the AVR will still be an unbalanced RCA connector.

...confused.gif

-
Edited by BeeMan458 - 5/26/13 at 9:19am
post #1597 of 2293
Depends on what you're driving with the mini. If it's a finished sub with rca inputs, the unbalanced will wotk fine. If you plan to drive pro amps, the balanced is the way to go, even if your receiver has just rca's out.
post #1598 of 2293
Quote:
Originally Posted by BeeMan458 View Post

I'm not arguing. I read different. Reads like more research is needed. When I order, it will be for the 2.0V, Rev-B..

(okay, got it. I'm confusing input sensitivity with output voltage)
I responded in another thread of yours but I'll repost the link here for everybody's reading pleasure; from Audioholics.

miniDSP's recommendation agrees with the article, or if you will, the article agrees with the folks at miniDSP and will be the unit I order once I can clear it with the card company.

Our AVR doesn't have balanced connections so I would have to go with unbalanced. Maybe I need to go with balanced and use a balance-to-RCA converter so when we upgrade the subs, I can use balanced connectors on the subwoofers. But the sub-out from the AVR will still be an unbalanced RCA connector.

...confused.gif

-

ya but that article refers to pro amps being used to drive speaker/subs...then of course the balanced is the way to go. My underdtanding is for finished subs with rca inputs, the unbalanced is what you want. I believe thats the detail minidsp missed when I contacted them
post #1599 of 2293
I would get the balanced even when not driving pro gear. You can always attenuate the levels. What you cannot do if you ever get pro gear is to make the minidsp put out more than 0.9v if you have the unbalanced model.

I ran my balanced minidsp to a plate up briefly while finishing my IB sub. Worked fine.
post #1600 of 2293
Quote:
Originally Posted by scubasteve2365 View Post

I would get the balanced even when not driving pro gear. You can always attenuate the levels. What you cannot do if you ever get pro gear is to make the minidsp put out more than 0.9v if you have the unbalanced model.

I ran my balanced minidsp to a plate up briefly while finishing my IB sub. Worked fine.

Yep, I regret buying the unbalanced, it would have been only 20 bucks more for the balanced.
post #1601 of 2293
Quote:
Originally Posted by scubasteve2365 View Post

I would get the balanced even when not driving pro gear. You can always attenuate the levels. What you cannot do if you ever get pro gear is to make the minidsp put out more than 0.9v if you have the unbalanced model.

I ran my balanced minidsp to a plate up briefly while finishing my IB sub. Worked fine.
When using a balanced out MD you only get 0.9V when using it single ended. The 2V output comes from it being phase to phase, not phase to ground.
post #1602 of 2293
The documentation for the balanced miniDSP 2x4 claims 2V RMS from each side to ground. See below. 14 dBu in balanced mode is 3.88V RMS.

post #1603 of 2293
Well that wasn't the case when I had one in hand. Show me the measurements.
post #1604 of 2293
Well, I'm not claiming their specs are right! But if you're correct, their specs are wrong and should be fixed.

If you want to really get confused, the user manual claims that both the single-ended and balanced max output levels are the same!

This is why I went with the DCX2496.
post #1605 of 2293
I have a openDRC AN coming and will test it against my dcx......
post #1606 of 2293
Quote:
Originally Posted by N8DOGG View Post

I have a openDRC AN coming and will test it against my dcx......
Sweet! You're gonna love it brotha!
post #1607 of 2293
can anyone tell me if the 0.9V rms output from the unbalanced minidsp can drive a behringer ep4000 to full power in 4 ohm bridged mode (lms-r 15", DVC wired in series)? If it can't, can it drive it to full power in 2 ohm stereo mode (lms-r 15" DVC wired as 1 channel each) with 2 outputs from the minidsp into 2 inputs on the ep4000? thanks.
post #1608 of 2293
The MiniDSP 2x4 unbalanced Rev B is 2.0 Vrms.
post #1609 of 2293
no, the input sensitivity is 2V yes, but the output is 0.9V http://www.minidsp.com/products/minidspkits/2-x-in-4-x-out
post #1610 of 2293
Quote:
Originally Posted by scubasteve2365 View Post

I would get the balanced even when not driving pro gear. You can always attenuate the levels. What you cannot do if you ever get pro gear is to make the minidsp put out more than 0.9v if you have the unbalanced model.

I ran my balanced minidsp to a plate up briefly while finishing my IB sub. Worked fine.

fwiw I never plan on running pro gear...all im trying to do is knock a peak down @ 30hz on my dual psa xv15's, other than that everything appears good according to my rew measurements.
post #1611 of 2293
Quote:
Originally Posted by basshead81 View Post

fwiw I never plan on running pro gear...all im trying to do is knock a peak down @ 30hz on my dual psa xv15's, other than that everything appears good according to my rew measurements.

You'll probably be fine, but its still one of those things where you never know. There's no downside to going with the balanced other than the terminations into the Phoenix connectors.

Plans change and pro amps are cheap.
post #1612 of 2293
Quote:
Originally Posted by BeeMan458 View Post

Our AVR doesn't have balanced connections so I would have to go with unbalanced. Maybe I need to go with balanced and use a balance-to-RCA converter so when we upgrade the subs, I can use balanced connectors on the subwoofers. But the sub-out from the AVR will still be an unbalanced RCA connector.

...confused.gif

-

http://seriousaudioblog.blogspot.com/2012/06/easy-rca-inputs-and-outputs-for-2x4.html

You can use unbalanced in and either unbalanced or balanced out. The miniDSP digitizes the input, so it really doesn't matter.
post #1613 of 2293
Quote:
Originally Posted by DS-21 View Post

You can use unbalanced in and either unbalanced or balanced out. The miniDSP digitizes the input, so it really doesn't matter.

Thanks as all I want is the simple and if I'm good going with RCA in-n-out connectors, seeing that I have under 15' worth of subwoofer connector cable (each cable is 4m), I'm a happy camper if using unbalanced connectors.

FWIW, I've tried twice and cannot get the credit card authorization to go through. I've contacted the issuer of the card and there's nothing they can do. Due to reported PayPal problems, we won't use PayPal as they want too much account information that can lead to identity theft. I have an e-mail into miniDSP to see what they can recommend.

Boo-Hoo me.

-
Edited by BeeMan458 - 5/28/13 at 1:59pm
post #1614 of 2293
I contacted miniDSP and they say it's a PayPal issue and I can't buy their product unless willing to give PayPal our personal information which I won't do as there are too many horror stories that go along with opening a PayPal account.

I've asked the DevTeam for help in buying their product and hopefully they'll offer another financial vehicle in which to buy their product other than PayPal and if they don't, I will consider myself locked out of buying a miniDSP, 2x4.
post #1615 of 2293
Quote:
Originally Posted by BeeMan458 View Post

I contacted miniDSP and they say it's a PayPal issue and I can't buy their product unless willing to give PayPal our personal information which I won't do as there are too many horror stories that go along with opening a PayPal account.

I've asked the DevTeam for help in buying their product and hopefully they'll offer another financial vehicle in which to buy their product other than PayPal and if they don't, I will consider myself locked out of buying a miniDSP, 2x4.

there's nothing to worry about just don't link your paypal acct to your bank account and u should have no problems ever. assuming since u don't even use paypal u will probably never sell anything and i have never heard of buyers having problems i have been using paypal for probably 10 years without a single problem probably over 50k transactions my acct has been locked once and required i send a scanned copy of my id and that was it and that was b/c i accessed the acct from Canada and my home at the same time
post #1616 of 2293
Yeah the only complaints people have with paypal is when they are receiving money from ebay buyers on it.
post #1617 of 2293
Has something happened to their website. I've been looking at them to equalize my sub and now the website looks likes it's gone.
post #1618 of 2293
Maybe at your end, I was just there...and it seems fine.
post #1619 of 2293
Which MiniDSP for me, and which plug-in?

- I need to EQ two LMS-Ultras, and use it for HPF and LPF. They are sealed now, and will be vented soon. A/V receiver's RCA sub outs to two bridged EP4000, to subs.

Would like to integrate the mic to use REW also.

Thanks fellas!
post #1620 of 2293
I use the balanced 2x4 because of the higher voltage output. Someone on here tested it at 4.83v max in/out voltage before clipping.
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: DIY Speakers and Subs
AVS › AVS Forum › Audio › DIY Speakers and Subs › MiniDSP