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post #61 of 4448 Old 10-23-2010, 01:24 PM - Thread Starter
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Im hoping to get up to Canada Sometime soon but I doubt its going to be before December. We definitely need to plan something together.

It allows for advance EQing so if someone understands transfer functions and bi-quad stuff they can pretty well create anything they want so yes I would assume SSF @ 15Hz, LT circuits, etc for subwoofers can be created. The SpreadSheet I downloaded has those functions too so I do not really need learn how to create the bi-quad values from scratch. The spreadsheet does it for a noob like me.

How many PEQs?? I guess its as many as the memory holds. I have not checked that but if it can do a serious 4-way XO then it has more then enough space for EQing a subwoofer or two.

The MiniDSP that comes in a box is the RCA version they have an XLR version but no box so its more of a DIYers thing where someone has to put it on a box and add the XLR input/output connectors to it.

Right now mine is going Pre/pro RCA -> MiniDSP RCA -> RCA on my plate amp (LT/1300) that had no SFF in it so Im all RCA (unbalanced) in that setup.

You can definitely go MiniDSP RCA -> XLR input on a pro amp. I do not see an issue since its just like all the AVRs and Pre/pros doing RCA -> XLR. Im not sure adding the MiniDSP would solve your hum if your Amp is still a balanced connection.

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post #62 of 4448 Old 10-23-2010, 04:40 PM
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Wow, this looks like a neat little trinket, an infinitely configurable Bassis/PEQ/SSF......another thing added to wishlist....done.

JSS
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post #63 of 4448 Old 10-25-2010, 04:30 AM
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Wow ... shocked at the cost of shipping. $35 for what appears to be a tiny box??

 

My DIY Subs ... https://www.avsforum.com/avs-vb/showthread.php?t=1233892

Quote:

J Dunlavy:.. if you stop to think about it, no loudspeaker can sound more accurate than it measures.

 

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post #64 of 4448 Old 10-25-2010, 04:33 AM
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Ooops ... just realized they're based on Hong Kong...

 

My DIY Subs ... https://www.avsforum.com/avs-vb/showthread.php?t=1233892

Quote:

J Dunlavy:.. if you stop to think about it, no loudspeaker can sound more accurate than it measures.

 

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post #65 of 4448 Old 10-25-2010, 05:22 AM - Thread Starter
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Yeah, the $35 is high for just a little box

but at $160 total, I still think its unmatched period.

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post #66 of 4448 Old 10-25-2010, 01:32 PM
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Well, I ordered one and having it delivered to a San Fran office of course as one of my Sales VP's from there is coming to Toronto next week ... hopefully it'll get there before he leaves.

 

My DIY Subs ... https://www.avsforum.com/avs-vb/showthread.php?t=1233892

Quote:

J Dunlavy:.. if you stop to think about it, no loudspeaker can sound more accurate than it measures.

 

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post #67 of 4448 Old 10-25-2010, 02:23 PM
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Hi pbc,

Which unit did you get Rev A or Rev B?

Cheers.
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post #68 of 4448 Old 10-25-2010, 03:16 PM
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RevA similar to Penn's, didn't even look at what the difference was?

 

My DIY Subs ... https://www.avsforum.com/avs-vb/showthread.php?t=1233892

Quote:

J Dunlavy:.. if you stop to think about it, no loudspeaker can sound more accurate than it measures.

 

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post #69 of 4448 Old 10-25-2010, 10:40 PM
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Thanks PBC.
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post #70 of 4448 Old 10-26-2010, 04:52 AM
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Penn - did you get any of the available plugins with your device?

 

My DIY Subs ... https://www.avsforum.com/avs-vb/showthread.php?t=1233892

Quote:

J Dunlavy:.. if you stop to think about it, no loudspeaker can sound more accurate than it measures.

 

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post #71 of 4448 Old 10-26-2010, 05:06 AM
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Looks like you bought this?

http://www.minidsp.com/onlinestore/d.../2way-advanced

 

My DIY Subs ... https://www.avsforum.com/avs-vb/showthread.php?t=1233892

Quote:

J Dunlavy:.. if you stop to think about it, no loudspeaker can sound more accurate than it measures.

 

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post #72 of 4448 Old 10-26-2010, 05:42 AM - Thread Starter
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Quote:
Originally Posted by pbc View Post

RevA similar to Penn's, didn't even look at what the difference was?

RevA

Quote:


This product is a RevA version with 0.9Vrms/2.6Vpp input capabilities. It is the perfect fit for PC sources, portable players or any source capable of lowering the signal to this level. If you intend to connect it to a CD player, or any other source which you don't have volume control over, you should purchase the RevB version instead.

RevB
Quote:


This board is a RevB version with 2Vrms input capabilities. It is the perfect fit for high grade CD player, or any other source which you don't have volume control over. If you intend to feed a lower signal (e.g. Ipod/PC source..) and would like greater sensitivity, please have a look at our RevA board instead.


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post #73 of 4448 Old 10-26-2010, 05:42 AM - Thread Starter
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Quote:
Originally Posted by pbc View Post

Looks like you bought this?

http://www.minidsp.com/onlinestore/d.../2way-advanced

Yes, that is the plug-in I purchased.

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post #74 of 4448 Old 10-26-2010, 10:42 AM
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Cool ... thanks.

 

My DIY Subs ... https://www.avsforum.com/avs-vb/showthread.php?t=1233892

Quote:

J Dunlavy:.. if you stop to think about it, no loudspeaker can sound more accurate than it measures.

 

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post #75 of 4448 Old 10-26-2010, 02:29 PM - Thread Starter
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Is this for you subs or new DIY mains? There might be a better plug-in for subwoofers. I have not really thought about it.

It is not "open-minded" to reject knowledge - Bob Lee
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post #76 of 4448 Old 10-26-2010, 02:45 PM
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Subs...

 

My DIY Subs ... https://www.avsforum.com/avs-vb/showthread.php?t=1233892

Quote:

J Dunlavy:.. if you stop to think about it, no loudspeaker can sound more accurate than it measures.

 

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post #77 of 4448 Old 10-26-2010, 03:30 PM
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Hi all,

I am new to this and was about to purchase a Behringer FDP 1124p to EQ a sub using REW. Is this a better product for this task?

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post #78 of 4448 Old 10-26-2010, 07:14 PM - Thread Starter
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What subs and amps are you using?

It is not "open-minded" to reject knowledge - Bob Lee
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post #79 of 4448 Old 10-27-2010, 04:16 AM
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Sounds like for subs they are recco'ing the 4 Way Advanced Xover (advanced if you need an L/T anyhow)...

http://www.minidsp.com/images/docume...%20plug-in.pdf

Possibly because it is the only one available with built in HP/LP filter settings for L/T and Butterworth x-overs?

 

My DIY Subs ... https://www.avsforum.com/avs-vb/showthread.php?t=1233892

Quote:

J Dunlavy:.. if you stop to think about it, no loudspeaker can sound more accurate than it measures.

 

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post #80 of 4448 Old 10-27-2010, 04:29 AM - Thread Starter
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Yeah, The 4-way is better choice for subs.

Any of the advanced EQing plug-ins will be able to create LT circuits and HPFs because the advanced part allows for Bi-quad stuff and that is where all the great functionality resides.

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post #81 of 4448 Old 10-27-2010, 04:54 AM - Thread Starter
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From MiniDSP

Quote:


Community members asked for it, miniDSP Dev Team delivered!
Introducing new versions of 2way Advanced, 4way Advanced and a new release of a 2.1 Advanced plug-in. For the past few weeks, our engineering team has been busy developing the following innovative features:

Import of Auto EQ settings from REW 3rd party software
Copy features to mirror EQ settings to another channel (2/2.1 plugin)
Import .frd frequency response now supported
Biquad calculator allows quick and easy calculation of basic filters
This new release marks is a new milestone for the miniDSP team as we worked for the first time with John Mulcahy, author of the well known freeware Room EQ Wizard (REW). With a complete solution now allowing measurement and auto EQ settings from a single platform, the new import feature of the miniDSP Advanced plug-ins is an innovative feature we're proud to bring to your home.
Maybe the beginning of some future partnership with the development of new features. miniDSP would like to thank John for his valuable insight and his implementation into REW.

REW is available for download for free. See REW website for more info on how to use REW as a measurement and tuning platform.

Download of new versions of the miniDSP Advanced plug-ins is now available from the webstore for new users or from the User Downloads sections for previous users of the plug-in. User manual on REW custom EQ to be updated shortly. Have fun!


Also a balanced version is available but not in a box yet.

Can we say best manual EQing tool??

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post #82 of 4448 Old 10-27-2010, 05:06 AM
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Yeah, I'm just wondering why the 4way specifically shows HP/LP, I guess these functions are "built in" without the need for biquad? I have no idea what biquad even is for that matter or how easy it would be to learn.

 

My DIY Subs ... https://www.avsforum.com/avs-vb/showthread.php?t=1233892

Quote:

J Dunlavy:.. if you stop to think about it, no loudspeaker can sound more accurate than it measures.

 

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post #83 of 4448 Old 10-27-2010, 06:19 AM - Thread Starter
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Quote:
Originally Posted by pbc View Post

Yeah, I'm just wondering why the 4way specifically shows HP/LP, I guess these functions are "built in" without the need for biquad? I have no idea what biquad even is for that matter or how easy it would be to learn.

They can add any filter to make it easy for us, they are just giving us a simple interface and doing all the formulas behind the scenes.

Here is my limited knowledge of bi-quads.

Everything in the XO or EQing world starts with a formula, Transfer functions are the low level math stuff that is going on. Everything is derived from them. We generally do not see them instead we have "Known" XOs like Linkwitz/Riley and Butterworth. What the miniDSP advance level offers is for those with some understanding of the raw, low level transfer functions to create their own custom Filters and XOs.

Bi-quads are transfer functions that manipulate the digital signal.

So if they added LP and HP on one of the plug ins, they are just giving us a front end so we do not have to figure out the bi-quad formulas ourselves.

I have requested that they add L/T Circuits and HPF that goes down to 5 Hz so its easier for people to understand what this minidsp can do. I think it has huge pontential in the manual EQ market.

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post #84 of 4448 Old 10-27-2010, 09:40 AM
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I wonder if there is a simple way to "affix" this sort of item inside a subwoofer box. Hmmm ... does it connect to the laptop via USB?

 

My DIY Subs ... https://www.avsforum.com/avs-vb/showthread.php?t=1233892

Quote:

J Dunlavy:.. if you stop to think about it, no loudspeaker can sound more accurate than it measures.

 

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post #85 of 4448 Old 10-27-2010, 10:14 AM - Thread Starter
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Yes, It connects and powers via USB connection.


It should go where the amp/AVR are located..

It is not "open-minded" to reject knowledge - Bob Lee
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post #86 of 4448 Old 10-27-2010, 01:32 PM
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Penngray,

I had this posted in another thread.
I like that price for the MiniDSP. I addition to filters, what else would I need to purchase? Would I need a calibrated mic? An external sound card for a laptop?

Thanks,

R.
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post #87 of 4448 Old 10-27-2010, 02:26 PM
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Quote:
Originally Posted by psgcdn View Post

Hi all,

I am new to this and was about to purchase a Behringer FDP 1124p to EQ a sub using REW. Is this a better product for this task?

Quote:
Originally Posted by penngray View Post

What subs and amps are you using?

Building a Tuba HT and likely a Behringer EP2000 (not purchased yet).

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post #88 of 4448 Old 10-27-2010, 03:22 PM - Thread Starter
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Quote:
Originally Posted by raze View Post

Penngray,

I had this posted in another thread.
I like that price for the MiniDSP. I addition to filters, what else would I need to purchase? Would I need a calibrated mic? An external sound card for a laptop?

Thanks,

R.

buy these

M-audio Mobilepre USB sound card (other sound cards will work too, I like this one because it has the phatom power for the mic built in)

ECM8000 Mic with calibration file (Dayton Mic EMM-6 would be fine too, it has a .cal file also).

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post #89 of 4448 Old 10-27-2010, 06:22 PM
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Wow,

minidsp being able to talk to REW is great news. You can simultaneously set HPF and EQ and low freq boost, plus measure the amt of distortion to keep boost at a reasonable level as well.....NICE.

JSS
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post #90 of 4448 Old 10-28-2010, 05:30 AM
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Quote:
Originally Posted by maxmercy View Post

Wow,

minidsp being able to talk to REW is great news. You can simultaneously set HPF and EQ and low freq boost, plus measure the amt of distortion to keep boost at a reasonable level as well.....NICE.

JSS

Where did you see this? That would be pretty cool.
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