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#11
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For correcting the response, you don't need to use all the poles on xover points. You can try placing one or two poles on the very bottom (22hz or 36Hz) should significantly flatten the response of the bass panel up to mid regions, another pole or two on the other side (330Hz or 360Hz). In 3 way, you have 12 poles with the xvr1. If you set it up properly, you can remove nulls and significant peaks. You will be left with 1-2db fluctuations in the longer bands but anything under 3db is indistinguishable to human hearing. It's a lot of work, like tens of hours of calibrating perhaps (digital room eq does this in minutes) but that's ok with me. At the end, you are rewarded with never to digitize your signal. On a second thought, writing a matlab code for playing with the poles would help figure out where to use poles. Matlab code would assume petfect flat response of course but it would help you calculate the curve if you have to place to poles very closely. Last edited by substance; 01-06-2016 at 09:50 PM. |
#12
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If you have the XVR1 crossover and read Nelson's rather amusing introduction in the owner's manual, I'm sure you saw this:
INTRODUCTION Some audio products are designed for anybody who can put batteries in a flashlight. This product is not like that. Some audio products are designed so that you don’t have to study the manual. This product is not like that, either. Some audio products are designed so that you plug them in and you don’t have to fool around with them for a year before the system is greatly improved.... The XVR1 is a fantastic piece of engineering, but I think you are barking up the wrong tree trying to use the XVR1 crossover for room correction. |
#13
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I don't want to sound rude but I already mentioned I have an ECE degree, I took all of the analog(microelectronics, power, sensors etc), both discreet and continous time, and some rf courses(and some more). I have been building/desiging such circuits for about a decade now. I am pretty confident Nelson's introduction does not apply to me.
I want to make it clear again. I don't expect ruler flat curves you would accomplish with a digital dsp. I can remove heavy nulls and peaks with the xvr1. Room eq in essence is the same thing as xvr1 written in software and many of them. If you already have a digital signal, by all means digital processing is better. No phase issues, you can have many polls and zeros, literally zero distortion. But I want to keep my analog sources in analog. I respect some folks like to buy a product that already sounds good out of the box or pay for someone to calibrate it for them. At the end they are only interested in the good sound. I like the good sound too but calibrating, modifying, tweaking my electronics is part of that joy for me. |
#14
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I totally agree with GaryProtein.
Don't forgett how your room acoustics behave. If you have room modal resonances, this can never be EQ. Even if you get flat freq response curve in the room. Look at this video, very interesting. https://youtu.be/zrpUDuUtxPM |
#15
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Why are we talking about room eq? Do you see in any of my original post, I mention room eq? Xvr-1 specifically sits under active xover sub-header. Once Garry started questioning my reasoning on such project, i used the word semi room eq, I should have perhaps say kinda room eq. Anyways I never intended to emphasize on room eq, well we taked about it, lets agree to disagree on the xvr-1. Can we go back to the original question?
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#16
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A crossover is not the right tool for the job. You said: Quote:
Last edited by GaryProtein; 01-07-2016 at 10:36 AM. |
#17
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Ok garry, you win.
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#18
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Is this now the end of the substance abuse?
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#19
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Is this question related to my substance addiction?
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#20
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Thank you for this youtube video. It should be required viewing for all! |
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