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MiniDSP - Page 56

post #1651 of 2293
Thanks for your help Oliver. I ended up redoing the EQ on the MiniDSP and just ignoring the level matching Audyssey error and it seems everything is working better now. I will need to run one of those test scenes through my system and keep watch on the boost level. In the end I really didn't end up with as much boost as before. I did some before measurments and will try to remeasure the system again later, but I'm done messing with it for now. I'd like to just sit and enjoy listening to it for a while.
post #1652 of 2293
Quote:
Originally Posted by LexMan View Post

Quote:
Originally Posted by DS-21 View Post

Balanced (either in-a-box or just the board), 4-way Advanced.

Thanks for your reply. One question, why not unbalanced?

Because the balanced has 3dB more output, so it can be used with a much wider variety of amps.
post #1653 of 2293
Quote:
Originally Posted by DS-21 View Post

Because the balanced has 3dB more output, so it can be used with a much wider variety of amps.
Balanced should have twice the voltage swing, for 6dB more output.
post #1654 of 2293
Quote:
Originally Posted by Bill Fitzmaurice View Post

Quote:
Originally Posted by DS-21 View Post

Because the balanced has 3dB more output, so it can be used with a much wider variety of amps.
Balanced should have twice the voltage swing, for 6dB more output.

Bill is correct on the math. My prior post was in error.
post #1655 of 2293
Quote:
Originally Posted by DS-21 View Post

Bill is correct on the math. My prior post was in error.
Understandable, as we far more often deal with the 3dB that results from doubling power.
post #1656 of 2293
Is the OpenDRC-AN rack mountable? I can't find a custom faceplate w/ Middle Atlantic (but could have one made) ... unit appears to be just over 1 RU.
post #1657 of 2293
Howdy all.

I was just pointed to this thread, and I really need some guidance.

This is the first I've heard of the miniDSP, and it sounds like a fantastic tool I wish I had years ago!

Here is my (somewhat convoluted) setup.

My Home (media) Theater and Two Channel "audiophile" setup are in the same room.
Onkyo TX-SR805 for 7.1 with the sub out to an EP4000 driving a Maelstrom 21" - No management besides the built in Audyssey
Two channel setup is Oppo BDP-105 -> Decware Zen Amp -> Decware MTM speakers

I *just* got the Oppo this weekend, and the two channel audio has absolutely captivated my Fiance and I - so we've not even hooked it up to the Onkyo yet, but she asked me late last night after a great listening session of Blue Man Group "Audio" if I could figure out a way to hook up the 21" sub to the two channel setup, but still have it available for the Onkyo 7.1 Home Theater.

I was thinking about using the Balanced outs on the Oppo, and it was suggested to me to get a miniDSP to high-pass/low-pass the sub and EQ it.

But then, how do I keep the sub integrated to the 7.1 setup and have it processed via the miniDSP? I really can't afford the miniDSP 8 in 8 out setup. That would probably do everything I need and give me room to add another subwoofer. I was really hoping to just get the 2 in 4 out Balanced kit and the MIC and somehow get the subwoofer shared on both systems.

Any ideas from the more experienced miniDSP users? I kinda feel like I have to jump from a $115 solution to a $500 solution to do what I want, I'm hoping there is a clever way around that...
post #1658 of 2293
Go into the Oppo's setup, set the speakers to small and set an XO point. Then take the left and right unbalanced analog outputs from the Oppo and feed them to the tube amp. Now, take the Oppo's unbalanced analog sub-out and feed that to a balanced 2x4 Mini, along with the unbalanced sub-out from the Onkyo into a separate input on the Mini. Then take the Mini's balanced output 1 or 2 and use it to feed your sub's amp. Use an Advanced 2.1 plugin and set it to Mono for outputs 1&2.

The Mini is being used as a summing box and unbalanced to balanced converter. Oh, and it does EQ too.

You can send digital from the Oppo to the Onkyo for movies.

I'm basically wingin' it here, so don't blame me if it doesn't work exactly as you'd like..
post #1659 of 2293
Quote:
Originally Posted by Oliver Deplace View Post

Go into the Oppo's setup, set the speakers to small and set an XO point. Then take the left and right unbalanced analog outputs from the Oppo and feed them to the tube amp. Now, take the Oppo's unbalanced analog sub-out and feed that to a balanced 2x4 Mini, along with the unbalanced sub-out from the Onkyo into a separate input on the Mini. Then take the Mini's balanced output 1 or 2 and use it to feed your sub's amp. Use an Advanced 2.1 plugin and set it to Mono for outputs 1&2.

The Mini is being used as a summing box and unbalanced to balanced converter. Oh, and it does EQ too.

You can send digital from the Oppo to the Onkyo for movies.

I'm basically wingin' it here, so don't blame me if it doesn't work exactly as you'd like..

That makes a lot of sense. I'm just not sure the Oppo works like that. If it does, that's an awesome solution you came up with! Thanks!
post #1660 of 2293
Quote:
Originally Posted by Lonely Raven View Post

That makes a lot of sense. I'm just not sure the Oppo works like that. If it does, that's an awesome solution you came up with! Thanks!

The Oppo's outputs are all active simultaneously. It will work as Oliver has noted. HDMI out to your Onkyo then analog outs to the external amps/MiniDSP for 2CH music. The settings you make in the Oppo for your analog outputs do not affect the HDMI output. So those changes will not affect how your setup sounds when you listen through your HT setup.
post #1661 of 2293
Quote:
Originally Posted by duc135 View Post

The Oppo's outputs are all active simultaneously. It will work as Oliver has noted. HDMI out to your Onkyo then analog outs to the external amps/MiniDSP for 2CH music. The settings you make in the Oppo for your analog outputs do not affect the HDMI output. So those changes will not affect how your setup sounds when you listen through your HT setup.

Your on the right track, but the two channel setup comes straight out of the stereo analog outputs to my tube amp. If I used HDMI out to the Onkyo, that would use the Onkyo's DAC and defeat the purpose of the Oppo's fantastic DACs, right?

So I need to go Stereo Analog out to the tube amp, while doing 7.1 analog out to the Onkyo (as a power amp only), and I think I need to go directly from the sub-out on the Oppo to the miniDSP then to the sub...but I tried the sub-out off the Oppo last night and got no-joy. Which means either the 7.1 sub-out doesn't work off regular CD Playback, or there is a toggle somewhere I need to flip. I asked in one of the Oppo threads in hopes someone can answer me definitively. If that sub-out works all the time, (with or without the Oppo crosover), I'd be 90% of the way there and just need the MiniDSP.
post #1662 of 2293
Quote:
Originally Posted by Lonely Raven View Post

Your on the right track, but the two channel setup comes straight out of the stereo analog outputs to my tube amp. If I used HDMI out to the Onkyo, that would use the Onkyo's DAC and defeat the purpose of the Oppo's fantastic DACs, right?

So I need to go Stereo Analog out to the tube amp, while doing 7.1 analog out to the Onkyo (as a power amp only), and I think I need to go directly from the sub-out on the Oppo to the miniDSP then to the sub...but I tried the sub-out off the Oppo last night and got no-joy. Which means either the 7.1 sub-out doesn't work off regular CD Playback, or there is a toggle somewhere I need to flip. I asked in one of the Oppo threads in hopes someone can answer me definitively. If that sub-out works all the time, (with or without the Oppo crosover), I'd be 90% of the way there and just need the MiniDSP.

The stereo outputs on the Oppo connect directly to your tube amp that powers your 2CH speakers so that would use the Oppo's DACs. When you are using your HT the Oppo is connected to the Onkyo via HDMI so that would use the Onkyo's DACs. If you decide to go with the 7.1 analog to the Onkyo then you may or may not be doing a double DAC depending on how the Onkyo handles the MC inputs. Some receivers apply it's internal DACs to those inputs while others do not.

Just because the Oppo has superior DACs over the Onkyo, don't think using HDMI over to the Onkyo is automatically worse. If your Onkyo has Audyssey then the the room corrections made by Audyssey could possibly trump the superior DACs of the Oppo. Try it both ways and you may be surprised. Most people prefer the sound of an Audyssey calibrated system over one that is not. It would take a very well acoustically treated room to negate the advantages of Audyssey or lower it to the point that Audyssey improvements are less favorable than going direct from the Oppo and using the Oppo's DACs. I would try it both ways and see which you prefer.

If your sub is not playing when going direct from the Oppo to the MiniDSP then either the MiniDSP or the Oppo is not configured correctly. If you bypass the MiniDSP and go from the Oppo directly to the sub amp and it works then you know it's the MiniDSP. If it still doesn't work then it's your settings in the Oppo. I would keep the MiniDSP out of the chain until you get the sub figured out first. Then you can add the MiniDSP back in to calibrate.
post #1663 of 2293
Quote:
Originally Posted by duc135 View Post

The stereo outputs on the Oppo connect directly to your tube amp that powers your 2CH speakers so that would use the Oppo's DACs. When you are using your HT the Oppo is connected to the Onkyo via HDMI so that would use the Onkyo's DACs. If you decide to go with the 7.1 analog to the Onkyo then you may or may not be doing a double DAC depending on how the Onkyo handles the MC inputs. Some receivers apply it's internal DACs to those inputs while others do not.

I haven't tried the Analog 7.1 out of the Oppo yet, I still need to buy or build cabling for that, but it's next up on my list since I'm looking forward to watching some movies this weekend.
Quote:
Originally Posted by duc135 View Post

Just because the Oppo has superior DACs over the Onkyo, don't think using HDMI over to the Onkyo is automatically worse. If your Onkyo has Audyssey then the the room corrections made by Audyssey could possibly trump the superior DACs of the Oppo. Try it both ways and you may be surprised. Most people prefer the sound of an Audyssey calibrated system over one that is not. It would take a very well acoustically treated room to negate the advantages of Audyssey or lower it to the point that Audyssey improvements are less favorable than going direct from the Oppo and using the Oppo's DACs. I would try it both ways and see which you prefer.

I do have about 500# of acoustic treatment in the room, both absorption and diffusion, with more on the way...but I agree, I may like the Audyssey over the Oppo Analog, no matter how good the DACs are. Again, more I have to play with once I get all the cabling in place.
Quote:
Originally Posted by duc135 View Post

If your sub is not playing when going direct from the Oppo to the MiniDSP then either the MiniDSP or the Oppo is not configured correctly. If you bypass the MiniDSP and go from the Oppo directly to the sub amp and it works then you know it's the MiniDSP. If it still doesn't work then it's your settings in the Oppo. I would keep the MiniDSP out of the chain until you get the sub figured out first. Then you can add the MiniDSP back in to calibrate.

I don't have a MiniDSP yet. Right now I'm going straight out of my Onkyo - Sub Out to the EP4000 to my Maelstrom 21". I'd really like to manage the subwoofer a little bit better as I've managed to bottom it out once or twice, and the Oppo was a good excuse to revisit and re-evaluate and improve my setup. Since I'm considering adding a secon sub (either a MiniWrecker or the future 24" from SI) I was debating the extra expenditure of one of the bigger miniDSP so I have room for expansion. I wish there was a budget 4 IN model around the $200 price range!
post #1664 of 2293
Quote:
Originally Posted by Lonely Raven View Post

I don't have a MiniDSP yet. Right now I'm going straight out of my Onkyo - Sub Out to the EP4000 to my Maelstrom 21". I'd really like to manage the subwoofer a little bit better as I've managed to bottom it out once or twice, and the Oppo was a good excuse to revisit and re-evaluate and improve my setup. Since I'm considering adding a secon sub (either a MiniWrecker or the future 24" from SI) I was debating the extra expenditure of one of the bigger miniDSP so I have room for expansion. I wish there was a budget 4 IN model around the $200 price range!

I don't think you'll need anything more than the 2x4 balanced. I think the 2 way advanced plug-in is what you'll need to connect two sources to your sub amps, but I'm not too sure about that though. I'm hoping someone with more knowledge will chime in on that one.
post #1665 of 2293
Quote:
Originally Posted by duc135 View Post

I don't think you'll need anything more than the 2x4 balanced. I think the 2 way advanced plug-in is what you'll need to connect two sources to your sub amps, but I'm not too sure about that though. I'm hoping someone with more knowledge will chime in on that one.

I'm just about to pull the trigger on it. I'm just waiting for some computer networking gear to sell on Ebay, then blamo!
post #1666 of 2293
Don't go by just my recommendation on which unit you need. I would suggest you get more advice from the more knowledgeable folks here. I know they've introduced newer products since I bought mine so there might be something better for your application. You can also try posting on the forum section of the MiniDSP site.
post #1667 of 2293
I've browsed the Oppo's manual.
You must check to see if the sub is enabled. It may not automatically enable itself when you set a speaker to small.
So, set the sub to ON, set the front speakers to SMALL, choose an XO point, set all other speakers to OFF, check to see that DRC is OFF and the stereo outputs are set to FRONT LEFT/RIGHT.

With your tube amp off, make sure your sub is active.
Calibration comes later, when you have the Mini.
The 2x4 will allow the expansion of one more sub on its own output (you're currently using only one of the two mono outputs).
Edit: Actually, you could have a total of four subs, each on its own output. Output 1 will be paired with output 3 and output 2 with output 4. IOW, two per system. Plus, with splitters to those pairs that are co-located, you can have loads of subs.

You MUST have the Advanced 2.1 plugin, the 2-way will not do.


And as for using the Oppo's analog outputs connected through splitters to your Onkyo for movies... forget it.
You'll add undue complexity just to have the possibility of gaining some miniscule improvement during an activity that doesn't lend itself to such singular focus. "The movie sounded great, but I haven't a clue what it was about."
You will probably get better sound using HDMI anyway. Also, that miniscule improvement could be swamped by noise from all those analog interconnects. Oh, and one day, you may find that a channel is dead and you must twist the RCAs to revive it.
All that and the biggest problem is the 2-channel system has different downmix needs than does your movie system.
So, don't fight the current and go with the flow.
Edited by Oliver Deplace - 8/16/13 at 8:12am
post #1668 of 2293
Quote:
Originally Posted by Lonely Raven View Post

I'm just about to pull the trigger on it. I'm just waiting for some computer networking gear to sell on Ebay, then blamo!

If it were me, I'd get the Balanced MiniDSP 2X4, and I'd run the 2-way Advanced plugin.

The Balanced version handles higher input voltages without issues. If you need a bump box to get the level up to what your amp wants, I like my Henry Engineering MatchBox IIs a lot, they are basically flat to DC.
post #1669 of 2293
Can MiniDSP set a high pass of 5Hz and a low pass of 30Hz with -24dB per octave? Which application to buy? I just need to set a band pass filter.

What is the rated frequency response range for MiniDSP? Works till 0.1Hz?
post #1670 of 2293
The MiniDSP is only good down to 10Hz last I heard.
post #1671 of 2293
Just did this to find out. MiniDSP 2x4 unbalanced (http://www.minidsp.com/products/minidsp-in-a-box/minidsp-2x4).

Soundcard loopback to show what I am correcting for:



Adding nothing but MiniDSP into the loop and measure again (with correction):

post #1672 of 2293
Quote:
Originally Posted by Skylinestar View Post

Can MiniDSP set a high pass of 5Hz and a low pass of 30Hz with -24dB per octave? Which application to buy? I just need to set a band pass filter.

What is the rated frequency response range for MiniDSP? Works till 0.1Hz?



This is the output I get with a 5Hz HPF generated from the biquad spreadsheet (though I can play with Q of that for different results, 0.5 shown). I included a couple 30Hz LPFs, though there are other options and ultimately you can probably play around with it enough to get precisely the response you want.

This took 2 of the available 6 input filters, and there are another 6 available output filters.
post #1673 of 2293
@ nfraso
Thanks a lot for the graphs
post #1674 of 2293
Thought I would ask anyone that may have some good input for me.

I have a balanced mini dsp 2x4 with an Integra DTR80.3 feeding it for L&R. I have an older Adcom GFA7500 for amp duty feeding a TD15M-8ohm and a SEOS 12 with a BMS4550-16ohm.

I am getting a lot of "Hiss" out of the tweeter. I have read a lot about gain stage, etc, but don't really know my options as my amp does not have any gain adjustment.

The amp lists 1.1V as the input level for full output. I configured the jumpers in the mini for .9V. There was no difference in the level of hiss going from 2V to .9V on the mini. It also does not vary with AVR volume. If I unhook the AVR the hiss is still there. If I unhook the amp from the mini, the hiss goes away.

Is my only option in this config to find a way to attenuate the analog out of the mini on the tweeter side and crank the input level from the AVR?

If nothing else I will just build a passive to use with the tweeter, though I don't want to do this as I will be switching out the SEOS 12 with a SEOS 15 and eventually a SEOS 18, so the active would be nice to allow for easy changing.

Thanks in advance for any input.

Brian
post #1675 of 2293
Can the MiniDSP do this: set HP and LP corssover and finally with -12dB attenuation to lower the signal level?
Edited by Skylinestar - 8/30/13 at 12:57am
post #1676 of 2293
Quote:
Originally Posted by Skylinestar View Post

Can the MiniDSP do this: set HP and LP corssover and finally with -12dB attenuation to lower the signal level?

I do not own the lower end MiniDSP, but the 10x10HD can do all of that and much more.
Reply
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post #1677 of 2293
Quote:
Originally Posted by Skylinestar View Post

Can the MiniDSP do this: set HP and LP corssover and finally with -12dB attenuation to lower the signal level?

Not a problem.
post #1678 of 2293
Quote:
Originally Posted by nfraso View Post

Not a problem.
Which plugin app do you suggest to accomplish that?
post #1679 of 2293
4Way Advanced
post #1680 of 2293
About to pull the trigger on the MiniDSP balanced.
i was going to get the 2x4, will this be enough to run more then 4 amps? It only has 4 outputs, but I'm not sure if you can RCA split them without messing the voltage up?

Which plugin would work for Subwoofer duty.... 2 way advanced?

Also for those still looking for a PSU for theirs..... this one looks like a winner.
https://www.jameco.com/webapp/wcs/stores/servlet/ProductDisplay?storeId=10001&langId=-1&catalogId=10001&pa=220898&productId=220898
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