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In Reply to: RE: Beaming/shouting posted by Clive on April 30, 2009 at 01:53:52
It is hard to know whether my problem is a room node or a glass resonance.
Regarding the XTZ/Behringer , I have read your review but the behringer I think is much cheaper (350 usd vs 1000usd?)and does not need one to change the sysstem from active subs etc.You just connect it between the preamp and the subs as they are.
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Certainly the Behringer is much cheaper if you have the bass amps already or don't have any need to change them. If you use the RTA you'll need the Behringer or similar mic as well. The XTZ room analyzer is quite a bit more expensive than the Behringer mic but it gives you a better feel for what is happening in the bass.
The RTA in the XTZ or Behringer RTA may help you track down you patio door glass problem. I find being able to measure the room removes a lot of highly subjective guesswork. The freq seems high to be a room mode as such but I suppose it could be the res freq of the glass itself.
Actually I bought the XTZ room analyzer, mainly because of your review even though the behringer is an all in one solution (RTA/equalizer).I have not used the xtz yet it yet but it seems more detailed in the bass RTA so I was thinking of getting the behringer and combining the two for solving some of the bass problems.The behringer can adjust the bass frq quite well with the parametric eq as I see it, right?
Would this be a worthwhile upgrade for the bass?
What you are planning to do is exactly what I used for several months very successfully. I used a combination of PEQ and GEQ, you should indeed get more accurate results with the PEQ but use what works for you. Assuming you have a room with room modes to tame (ie it's not HUGE)then it's a significant improvement to the bass performance of your room/system but the degree does of course depend on how your room measures in the first place.
Take some measurements first to find out how the room performs. In my room I used 3 position measurements to begin with but when doing the fine-tuning I used single position measurement, it's much faster and in my situation there was little difference between 1 and 3 position.
With the room analyzer and DEQ2496 it took me 2 to 3 hours to get a good result once I had opimized subwoofer placement - which ended up being exactly when I had them in the first place! With the XTZ Sub Amp 1 I got a flatter response due to the room analyzer programming the dsp for me but you will get a good setup with the DEQ2496 too.
Drat!
After further investigation I have come back full circle to the widebanders.Putting pink noise around 800hz and moving very close behind the widebanders the ringing is very pronounced so no way it is a room node or resonance somewhere else in the room.The effect is more pronounced behind the speakers than in the front.If you stand back a bit or even from the listening position this peaking or ringing has a "phasey " quality so you cannot really tell from where in the room it is coming from.
So perhaps Robert is right and the speaker has changed characteristics and the damping process has "worn out" and the speaker is resonating .
Robert, what are the problem frequencies that you cure with the damping process?
I guess I will have to get some new widebanders and keep my fingers crossed that that will be the end of it.
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