Would like to Use miniDSP 2x4 to EQ Home Theater Subs - AVS Forum | Home Theater Discussions And Reviews
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post #1 of 31 Old 05-28-2017, 12:36 AM - Thread Starter
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Would like to Use miniDSP 2x4 to EQ Home Theater Subs

I discovered miniDSP products about a week ago and was immediately interested in the functionality they could provide at such low cost. Specifically, I have been looking into the possibility of using the miniDSP 2x4 to perform room correction for my 2 subwoofers.
Don't quite know the correct miniDSP to buy , balanced or unbalanced. I would appreciate some recommendations on the correct equipment to buy, and maybe anything else that may be crucial to accomplishing this .
My goal I think is to place the device between my AV-Receiver (Pioneer SC-81) and my two SVS PB1000s).

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post #2 of 31 Old 05-28-2017, 07:06 AM
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Quote:
Originally Posted by Steelman99 View Post
I discovered miniDSP products about a week ago and was immediately interested in the functionality they could provide at such low cost. Specifically, I have been looking into the possibility of using the miniDSP 2x4 to perform room correction for my 2 subwoofers.
Don't quite know the correct miniDSP to buy , balanced or unbalanced. I would appreciate some recommendations on the correct equipment to buy, and maybe anything else that may be crucial to accomplishing this .
My goal I think is to place the device between my AV-Receiver (Pioneer SC-81) and my two SVS PB1000s).
You want the 2x4 HD unbalanced. You also want to use REW. For that you'll need a USB mic, the REW software and a laptop with a HDMI out.

REW will allow you to see how your subs respond in your room. This will help you use the MiniDSP more effectively.

Typed on a tiny keyboard, excuse any typos
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post #3 of 31 Old 05-28-2017, 09:27 AM
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The HD version is newer and has slightly better capabilities.

Your plate amp would have to have balanced inputs to use the balanced version.

The CSL UMIK-1 is calibrated to 5hz to USA acoustic standards. The one directly from miniDSP is only 20hz and based on whatever highly suspect cal process they use in China.
http://cross-spectrum.com/measuremen...ated_umik.html
It's a tiny bit more expensive, but most people opt for it.

Other than that, all you need is REW. Which is a free download.

You will need a computer or laptop with a USB port and an HDMI port.
USB for the mic, HDMI for outputting the audio sweep signal to the AVR/DAC.

Nearly every graphics card in the last 10 years has had at least 1 HDMI port /w audio, and similarly for most laptops.
And nearly every computer in the last 17 years has had at least 1 USB port.
So you should be good to go...

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post #4 of 31 Old 05-28-2017, 12:28 PM - Thread Starter
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Being that I only want to use this on my subwoofers, the 2x4 HD unbalanced , as opposed to the older 2x4 unbalanced is the way to go? What useful benefits will I be getting by buying the HD version over the older one?

Thanks

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post #5 of 31 Old 05-28-2017, 01:11 PM
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Quote:
Originally Posted by Steelman99 View Post
Being that I only want to use this on my subwoofers, the 2x4 HD unbalanced , as opposed to the older 2x4 unbalanced is the way to go? What useful benefits will I be getting by buying the HD version over the older one?

Thanks
I asked the same a while back about the balanced vs HD.
Quote:
Originally Posted by enricoclaudio View Post
miniDSP 2x4 HD better
Quote:
Originally Posted by Marc Alexander View Post
Why?
Quote:
Originally Posted by enricoclaudio View Post
10 band PEQ instead of 5, 80ms delay instead of 7.5ms, 2V output unbalanced, 96KHz sample rate instead of 48KHz....

Plugin Specifications:

miniDSP 2x4 HDminiDSP 2x4
Quote:
Originally Posted by enricoclaudio View Post
Another good thing about the miniDSP 2x4 HD is that it's upgradable to DDRC-24 (Dirac Live) via software update ($245) so if at the end you get tired of REW then pay $245 and you get a DDRC-24 DL instead.
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post #6 of 31 Old 05-28-2017, 04:39 PM
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You want the balanced not the unbalanced unit.
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post #7 of 31 Old 05-28-2017, 05:15 PM
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Quote:
Originally Posted by Steelman99 View Post
Being that I only want to use this on my subwoofers, the 2x4 HD unbalanced , as opposed to the older 2x4 unbalanced is the way to go? What useful benefits will I be getting by buying the HD version over the older one?

Thanks
2x4 HD unbalanced has up to 2V output capability before signal attenuation takes place. So, you would have to do little to no gain compensation on the sub end. In other words, there is little to no signal loss from AVR depending on how hot you run your sub level in AVR and how loud you play the content.
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post #8 of 31 Old 05-28-2017, 05:22 PM - Thread Starter
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Quote:
Originally Posted by braveheart123 View Post
2x4 HD unbalanced has up to 2V output capability before signal attenuation takes place. So, you would have to do little to no gain compensation on the sub end. In other words, there is little to no signal loss from AVR depending on how hot you run your sub level in AVR and how loud you play the content.
I think I am about ready to order an unbalanced HD from Parts Express tonight. I even see a $10.00 discount coupon for their Memorial Day sale. This review helped alot to make my decision.

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post #9 of 31 Old 05-28-2017, 05:33 PM
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Quote:
Originally Posted by Steelman99 View Post
I think I am about ready to order an unbalanced HD from Parts Express tonight. I even see a $10.00 discount coupon for their Memorial Day sale. This review helped alot to make my decision.https://www.youtube.com/watch?v=RZNH4vxgz9A
I got my miniDSP 2x4HD from Deer Creek Audio. The price is the same as Parts-Express but George includes the $10 code for the 2x4HD plugin. Parts-Express does not include the plugin so you need to buy it from the miniDSP website.

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post #10 of 31 Old 05-28-2017, 05:40 PM - Thread Starter
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Excuse me for my ignorance but will I just use the Subwoofer pre outs of my av receiver using digital coax cables to the (in) #1 ,#2 on the HD, then connect the 2 powered subwoofers to any of the (out) ports on the HD using Digital coax?

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post #11 of 31 Old 05-28-2017, 05:42 PM
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Quote:
Originally Posted by basshead81 View Post
You want the balanced not the unbalanced unit.
That's what I thought until Enrico educated me. The HD is more capable.
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post #12 of 31 Old 05-28-2017, 06:35 PM
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I know when I had the 2x4 unbalanced it dropped the levels almost 12db. I had to use both inputs on the sub amps and even then I dealt with clipping issues at high playback levels. I have since moved on from Mini DSP products and am not familiar with the HD. Quick read on it yields that the unbalanced version should not have the clipping issues that the older model had. So my mistake on my previous post. I have used a few different EQ devices and I have found that the less stuff in the signal chain the better. I really like the manual PEQ in the Yamaha Aventage AVR's from 2016 on up better then anything I have used to date. jm2c
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post #13 of 31 Old 05-29-2017, 01:42 AM
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Quote:
Originally Posted by basshead81 View Post
I have used a few different EQ devices and I have found that the less stuff in the signal chain the better. jm2c
+1.

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Old version is enough for subwoofer work. Usually use less than 5 EQ band.
If use for 2 channel, HD is better, use FIR filter.


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post #15 of 31 Old 05-31-2017, 05:27 PM
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Quote:
Originally Posted by Steelman99 View Post
I think I am about ready to order an unbalanced HD from Parts Express tonight. I even see a $10.00 discount coupon for their Memorial Day sale. This review helped alot to make my decision.https://www.youtube.com/watch?v=RZNH4vxgz9A
That makes 2 of us. I ordered 2x4 HD HD along with the HD plugin.

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post #16 of 31 Old 05-31-2017, 05:30 PM
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Originally Posted by Gigaray View Post
Old version is enough for subwoofer work. Usually use less than 5 EQ band.
If use for 2 channel, HD is better, use FIR filter.


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Old one is marred by signal attenuation issues.

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Quote:
Originally Posted by braveheart123 View Post
Old one is marred by signal attenuation issues.
The balanced is not AFAIK.
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post #18 of 31 Old 06-01-2017, 04:41 PM
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Quote:
Originally Posted by braveheart123 View Post
Old one is marred by signal attenuation issues.
The new non-HD version now has a jumper to switch between 0.9vp-p or 2.0vp-p.

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I am debating if I should get a new receiver with sub EQ or get a miniDSP.

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The new non-HD version now has a jumper to switch between 0.9vp-p or 2.0vp-p.
That's on the input; the output is still limited to 0.9V.
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Quote:
Originally Posted by braveheart123 View Post
That's on the input; the output is still limited to 0.9V.
Most receivers output 1V p-p anyways so wouldn't that be pretty close maybe a bit more gain on the subwoofer? I believe the minidsp has a pretty high SNR so you can crank it up without adding noise.

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post #22 of 31 Old 06-02-2017, 02:09 AM
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Most receivers output 1V p-p anyways so wouldn't that be pretty close maybe a bit more gain on the subwoofer? I believe the minidsp has a pretty high SNR so you can crank it up without adding noise.

I have miniDSP 2x4 unbalanced. It sucks good 8-10dB sub output from AVR. I have verified it. Hence the reason, I bought the newer HD one.

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A great video tutorial on setup of the Minidsp 2x4 hd . This kid is a genius.


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Quote:
Originally Posted by jasonsong View Post
Most receivers output 1V p-p anyways so wouldn't that be pretty close maybe a bit more gain on the subwoofer? I believe the minidsp has a pretty high SNR so you can crank it up without adding noise.

My Onkyo is 2.14, and Ive seen people post lower and higher of the same model. If you dont measure the voltage output and just buy, you can end up with a attenuated signal. The balanced models have the internal jumpers which is why people switched.
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post #25 of 31 Old 06-02-2017, 08:11 PM
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Quote:
Originally Posted by Steelman99 View Post
A great video tutorial on setup of the Minidsp 2x4 hd . This kid is a genius.
I saw that video as well and yes he is. Not even sure he can vote but he can review audio products with the best of them.



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Trying to also figure this out. Would miniDSP be something that could be added to just the sub in a 7.1 system?

For example can I run my AVR auto EQ. In my case it would be yamaha YPAO RCS. Which would EQ everything.. but after that I would use minidsp to further perfect the sub EQ.

Then add the mini dsp between the AVR and my sub. by simply hooking it to the subwoofer out port of AVR and hooking the sub cable that was going to the AVR to the minidsp?

--Daniel
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post #27 of 31 Old 06-28-2017, 10:56 PM
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Quote:
Originally Posted by basshead81 View Post
I know when I had the 2x4 unbalanced it dropped the levels almost 12db. I had to use both inputs on the sub amps and even then I dealt with clipping issues at high playback levels. I have since moved on from Mini DSP products and am not familiar with the HD. Quick read on it yields that the unbalanced version should not have the clipping issues that the older model had. So my mistake on my previous post. I have used a few different EQ devices and I have found that the less stuff in the signal chain the better. I really like the manual PEQ in the Yamaha Aventage AVR's from 2016 on up better then anything I have used to date. jm2c
I also have a yamaha that allows manual PEQ.
Would the procedure be to run the YPAO auto eq and copy it all to the manual PEQ.
Then use REW to see what PEQ to apply to get it flat and apply them straight to the AVR?
No other hardware needed?
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post #28 of 31 Old 06-29-2017, 11:27 AM
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Quote:
Originally Posted by silicondt View Post
Trying to also figure this out. Would miniDSP be something that could be added to just the sub in a 7.1 system?

For example can I run my AVR auto EQ. In my case it would be yamaha YPAO RCS. Which would EQ everything.. but after that I would use minidsp to further perfect the sub EQ.

Then add the mini dsp between the AVR and my sub. by simply hooking it to the subwoofer out port of AVR and hooking the sub cable that was going to the AVR to the minidsp?

--Daniel

Yes. You can use it that way.
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post #29 of 31 Old 06-29-2017, 12:19 PM
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Quote:
Originally Posted by silicondt View Post
I also have a yamaha that allows manual PEQ.
Would the procedure be to run the YPAO auto eq and copy it all to the manual PEQ.
Then use REW to see what PEQ to apply to get it flat and apply them straight to the AVR?
No other hardware needed?
Yep that is correct!
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post #30 of 31 Old 06-29-2017, 12:23 PM
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Quote:
Originally Posted by basshead81 View Post
Yep that is correct!
Question: The reciever has 4 manual PEQ bands for the sub. Would running the auto YPAO and copying it to the manual PEQ use up all those bands?
Or would I copy everything into the manual PEQ. Then delete the sub bands it copied, and run my REW and get new bands to enter?
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