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MiniDSP - Page 36

post #1051 of 2293
I should have been more specific...the blue light is actually on the board. If you look through the edges around the usb or power, you should be able to see it.
post #1052 of 2293
Do you have a pic of this?
post #1053 of 2293
It blinks on and off at a constant rate when plugged in.



You could also take the screws out of one end and take the panel off.

post #1054 of 2293
Makes sense now. I just have the board. And on the board I can not see any light.
post #1055 of 2293
Before I order, just want to make sure I am ordering correctly. I will be using a pre/pro with 2 independent sub outs and Multi EQXT32. Sub A will go to a pair of subs in the front of my room. These two will need a bit of independent EQ/delay, but are similar. Sub B will be to a stack of 4 subs at the back of my room. They are identical and essentially act as one. My thought was a balanced 2X4 with the 2way advanced plug in. The other plug ins don't seem to allow me the ability to independently EQ the two subs of Sub A. Sound right?
post #1056 of 2293
No experience with the 2 way advanced, but the 4 way advanced would work as well. You could EQ all three "subs" independently if you wanted to.
post #1057 of 2293
Quote:
Originally Posted by VEXXD View Post

No experience with the 2 way advanced, but the 4 way advanced would work as well. You could EQ all three "subs" independently if you wanted to.

In looking at the data sheet for the 4 way advanced http://www.minidsp.com/images/documents/Product%20Brief-4way%20Xover%20ADV%20plug-in.pdf it appears that the two inputs do not remain independent. Am I reading that wrong? I would like to keep the pre/pro's two sub outs independent of each other as Sub A and Sub B.
post #1058 of 2293
It looks like you are correct, but I'm no expert smile.gif

I don't have two sub outs or Audyssey so I wasn't too concerned with the input part of the equation. I simply split my one output and set level/EQ/delay on each of my four subs separately.
post #1059 of 2293
Quote:
Originally Posted by VEXXD View Post

It looks like you are correct, but I'm no expert smile.gif
I don't have two sub outs or Audyssey so I wasn't too concerned with the input part of the equation. I simply split my one output and set level/EQ/delay on each of my four subs separately.

Setting level and delay on each 4 subs separately is good but if all 4 subs are playing the same signal from the LFE channel then they should be EQ'ed the same. The only exception is applying boost or an LT circuit for the low end boost if needed for sealed subs.

Chris from Audyssey explains how SubEQ works here: https://audyssey.zendesk.com/entries/20953442-subeq-ht-vs-multeq-xt32

But I went ahead and copied it for quick reference:

MultEQ XT32 is the flagship version of our technology to measure and correct room acoustical problems. Sub EQ HT is a method we came up with to deal with multiple subs. If you only have one sub then it's not in use. The idea is to first measure each sub separately, then apply delay and level settings so that the two subs are now time and level aligned. Then we ping them once more as "one" sub to derive the room correction filter.


Whether you have one sub or 16 they are all playing the same signal so they should be EQ-ed as one channel since that is what they are when connected to the LFE channel.
post #1060 of 2293
Quote:
Originally Posted by mjaudio View Post

Whether you have one sub or 16 they are all playing the same signal so they should be EQ-ed as one channel since that is what they are when connected to the LFE channel.

That's certainly the simplest way but not optimum because it doesn't account for the different freq resp of each sub and their acoustic interaction; see Geddes et al mult-sub approaches.
post #1061 of 2293
Quote:
Originally Posted by noah katz View Post

That's certainly the simplest way but not optimum because it doesn't account for the different freq resp of each sub and their acoustic interaction; see Geddes et al mult-sub approaches.

It is optimum, if you do the Geddes et al methods prior to applying EQ then less EQ is needed. EQ should be the last solution, setting up the subs properly before EQ is the best solution.

The different frequency responses of each sub will interact with each other once they are playing the same signal, why then would you want to play a separate signal to each sub and apply different EQ settings? If you have a peak at 50hz with one sub you know that with placement and phase (delay) with another sub can counteract that peak. If you were to apply EQ to that first sub without checking how both subs play together you will be adding an unnecessary cut at 50hz to only 1 sub if the other sub counter acts that 50hz peak.

All the subs are playing the same signal and we are trying to get the flattest response at the MLP, EQing the subs as one is the proper way to do it. The only reason to EQ each sub separately is if they are playing a different signal, like a stereo left and right sub. It is called 5.1 for a reason, there are 5 discreet channels and single LFE channel as it plays the same signal.
post #1062 of 2293
Question. Why buy a MiniDSP for about $125 if I can buy a Behringer FBQ2496 Feedback Suppressor/Parametric Equalizer (sorry copy pasted from amazon.com) for about $164 shipped?
post #1063 of 2293
Quote:
Originally Posted by javi404 View Post

Question. Why buy a MiniDSP for about $125 if I can buy a Behringer FBQ2496 Feedback Suppressor/Parametric Equalizer (sorry copy pasted from amazon.com) for about $164 shipped?
The Behringer can't do HPF or LPF, only EQ. High pass filtering is very useful to have and the LPF pretty much mandatory to cross it to the mains.
post #1064 of 2293
Quote:
Originally Posted by mjaudio View Post

It is optimum, if you do the Geddes et al methods prior to applying EQ then less EQ is needed. EQ should be the last solution, setting up the subs properly before EQ is the best solution.
The different frequency responses of each sub will interact with each other once they are playing the same signal, why then would you want to play a separate signal to each sub and apply different EQ settings? If you have a peak at 50hz with one sub you know that with placement and phase (delay) with another sub can counteract that peak. If you were to apply EQ to that first sub without checking how both subs play together you will be adding an unnecessary cut at 50hz to only 1 sub if the other sub counter acts that 50hz peak.
All the subs are playing the same signal and we are trying to get the flattest response at the MLP, EQing the subs as one is the proper way to do it. The only reason to EQ each sub separately is if they are playing a different signal, like a stereo left and right sub. It is called 5.1 for a reason, there are 5 discreet channels and single LFE channel as it plays the same signal.

I disagree. Unless all the subs are exactly the same AND exactly the same distance away from the listener. I have had a SubEQ, and up to 8 subs with it. You have to set delays, phase, sometimes do HPF, etc. to the individual subs before Audyssey does its thing. Another example is the DTS-10--you have to kill off its inherent "issues" with EQ before you do anything else no matter how many other subs you have. With MultiEQ XT32, Audyssey will see two sub channels. If I have two subs comprising Sub A in Audyssey's "eyes", I can optimize the results on that Sub A channel by making sure the two subs are "playing nice together" before Audyssey pings them.
post #1065 of 2293
I use a Onkyo PR-SC5508 connected to the fronts/sub amps with three miniDSPs. The pre-pro has dual sub outs providing different equalization and delay for each (Audyssey XT32) while the miniDSP provides high pass filtering. The other two miniDSPs cross over the L/C/Rs mid-bass and tweeters at about 1600Hz. I use the two way advanced plugins for all fronts including the subs.
post #1066 of 2293
Quote:
Originally Posted by Fatawan View Post

I disagree. Unless all the subs are exactly the same AND exactly the same distance away from the listener. I have had a SubEQ, and up to 8 subs with it. You have to set delays, phase, sometimes do HPF, etc. to the individual subs before Audyssey does its thing. Another example is the DTS-10--you have to kill off its inherent "issues" with EQ before you do anything else no matter how many other subs you have. With MultiEQ XT32, Audyssey will see two sub channels. If I have two subs comprising Sub A in Audyssey's "eyes", I can optimize the results on that Sub A channel by making sure the two subs are "playing nice together" before Audyssey pings them.

Apparently you didn't read my response from before that Noah responded to:

Setting level and delay on each 4 subs separately is good but if all 4 subs are playing the same signal from the LFE channel then they should be EQ'ed the same. The only exception is applying boost or an LT circuit for the low end boost if needed for sealed subs.

I agree with you that the delay and levels need to set up separately, the discussion was if EQ correction should be applied to each sub separately as well or as a single channel.
post #1067 of 2293
Are there any alternatives to minidsp in the same price range or cheaper?

Really all I need is a high pass filter before my sub amp, if there is something that has other features like parametric eq then that is fine but probably more than I need right now.
Edited by javi404 - 9/28/12 at 6:13pm
post #1068 of 2293
You can always build a Hpass for your speakers.
post #1069 of 2293
So can someone please sum-up what exactly the Minidsp does? It is my understanding that it works to EQ things such as subwoofers, and that it can also be setup to work as a crossover in an active system. So what else does this thing do? I read that this thing does not come with a power supply, nor power cord. So with that being said, how do you guys have your Minidsp's powered? Do these things make the Minidsp a good option for EQ'ing the main speakers in a home theater type setting for people who do not like and/or have the typical EQ systems built into most of todays AVR's?
post #1070 of 2293
Quote:
Originally Posted by Martycool007 View Post

So with that being said, how do you guys have your Minidsp's powered? Do these things make the Minidsp a good option for EQ'ing the main speakers in a home theater type setting for people who do not like and/or have the typical EQ systems built into most of todays AVR's?

Although I'm not a "guy," I power my miniDSPs with USB power supplies intended for cell phones. I don't think they are a "good" alternative to Audyssey XT32 but can be used to equalize a system. I use mine with Audyssey XT32, as HPFs on subs and crossovers for my L/C/Rs.
post #1071 of 2293
Thanks for the reply Miss Theresa!
post #1072 of 2293
Has anyone measured the inherent low frequency roll off of the MiniDSP itself? Specifically the 2x4 balanced model.
post #1073 of 2293
Not sure if it was ever verified but I remember it was noted to be flat to ~2hz.
post #1074 of 2293
Does anyone have any experience on shipping times for the MiniDSP? I ordered two of the balanced 2x4 models last week early Tuesday morning and it seems they haven't shipped yet (after 6 days). frown.gif
post #1075 of 2293
Hi,

I just got mine today...
Here's the info and hope it helps.

Posting Date Posting Time Drop-off Point
10-Oct-2012 18:28 Pick Up Service (Kowloon and New Territories)

Date # Location Delivery Status
10-Oct-2012 Hong Kong Item posted and is being processed.
11-Oct-2012 Hong Kong The item left Hong Kong for its destination on 11-Oct-2012
11-Oct-2012 Canada Arrived and is being processed.
11-Oct-2012 Canada Pending customs inspection.
11-Oct-2012 Canada In transit.
15-Oct-2012 Canada Arrived the delivery office and is being processed.
15-Oct-2012 Canada Delivered.

It took 7 days for them to send me the tracking no.
post #1076 of 2293
Thanks, what day did you order?
post #1077 of 2293
Quote:
Originally Posted by Stereodude View Post

Thanks, what day did you order?

The exact same model you ordered.
It's a major learning curve doing it by ear.
post #1078 of 2293
Quote:
Originally Posted by Stereodude View Post

Does anyone have any experience on shipping times for the MiniDSP? I ordered two of the balanced 2x4 models last week early Tuesday morning and it seems they haven't shipped yet (after 6 days). frown.gif

IIRC it took them a little over a week to ship out my order, but once it was shipped it only took a day to get to me in SoCal.
post #1079 of 2293
Quick question on input levels - is it normal for the level display in the UI to be very low with a LFE input? I have the 2x4 balanced and hooking up the unbalanced LFE input from my Sherwood R972 doesn't show any activity on the input monitors that is noticeably different than 'not connected', even with the jumper set to 0.9V - it basically hovers around -72 on the display. Even hooking the unit up to the balanced outputs from my NAD M51 (tested by Stereophile to have 4.7V output on the balanced connection) the input monitors show -40 or so (although that was at the 2V setting). The unbalanced LFE seems to be adequate to drive my existing setup, so if this is just an artifact of the input monitoring I don't want to make too big a deal out of it. I don't really want to have to insert a Clean Box Pro into the system, but it seems that this would solve the problem by converting the single-ended LFE to a pro-level balanced and providing additional gain. Since running with 0.9V input sensitivity and 2.0V output sensitivity should (in theory) provide 6dB gain though, 'logically' it probably shouldn't be needed.
I know the answer is probably 'try it and see', but the hassle of dismantling my current setup to get the minidsp in is high enough that I'd prefer to be as sure as possible before starting.
post #1080 of 2293
Quote:
Originally Posted by duc135 View Post

IIRC it took them a little over a week to ship out my order, but once it was shipped it only took a day to get to me in SoCal.
FWIW, mine finally shipped today after a week.
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