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#155710 - 01/12/07 11:27 PM freq response graphs for all axiom products ??
Randy_Perkins Offline
veteran

Registered: 08/31/06
Posts: 193
Loc: Franklin Indiana
hello,
I was looking at the freq response for my various axiom speaker, but not all them have graphs. The link is in the specifications for the speaker.
the m22's have one

but the qs4, vp100, and ep175 do not.


I wish they all had one , as I was looking for them when playing with the crossover frequency on my reciever.

another thing,
i noticed the ep500 graph is an Anechoic Resp. graph, while the m22 is a Freq Resp graph. I am guessing this is because the subwoofers response is closely tied to the room in which it is operating ?

How can I get resp graphs for the ep175,vp100, and qs4.
I was sorta surprised only the higher end stuff had them

thanks

Randy


Edited by Randy_Perkins (01/12/07 11:28 PM)

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#155711 - 01/13/07 08:52 AM Re: freq response graphs for all axiom products ?? [Re: Randy_Perkins]
SirQuack Offline
shareholder in the making

Registered: 01/29/04
Posts: 13311
Loc: Iowa
There is a post somewhere from Alan that explained that you can't graph a quadpolar design like the Qs4's or Qs8's by design.

Not sure why the other two speakers don't have graphs, my guess is they just haven't got around to placing a link on the website.
_________________________
M80s-VP180-QS8s-EP600-2xEP350 Denon3808 Outlaw7700
M22-OWM22-VP100-Denon2805
Audio Nirvana

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#155712 - 01/13/07 08:54 AM Re: freq response graphs for all axiom products ?? [Re: Randy_Perkins]
SirQuack Offline
shareholder in the making

Registered: 01/29/04
Posts: 13311
Loc: Iowa
just performed a search and found this from Alan.

"It's impossible to do accurate anechoic measurements of quadpolar, dipolar, or bipolar speakers for the reasons you cite. And if you do room measurements, those are only accurate for the specific room you put the QS8s in, because their output is so dependent on the particular reflections generated in that room. So you couldn't extrapolate from those measurements to other rooms.
"
_________________________
M80s-VP180-QS8s-EP600-2xEP350 Denon3808 Outlaw7700
M22-OWM22-VP100-Denon2805
Audio Nirvana

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#155713 - 01/13/07 09:38 AM Re: freq response graphs for all axiom products ?? [Re: SirQuack]
Randy_Perkins Offline
veteran

Registered: 08/31/06
Posts: 193
Loc: Franklin Indiana
Hey thanks for the response.
I hope you get your buzz and hum straightened out.

I can understand about the QS series, now that it is explained to me.

I would like to see a graph for the VP100, as the VP150 has one. The same applies to the EP175, although the EP350 doesnt list one either. I guess you have to get into the dsp subs before the graph is presented.

I had previously set my crossover at 80, but after looking at the graph for the M22, I moved it up to 100. I'd like to see the rolloff for the VP100 for the same reason. After peaking at the VP150's graph, maybe I should set the crossover for the center at 120 ??

I've been doing the sub crawl tonight with the avia disk. Where I had my sub before I was getting a null at 60hz. It was over 12db. I moved the sub and got it to about 6db. Cant blame it on the sub though, cause when I move around the room the null varies. my listening point is unfortunately the couch backed against the short wall of the room.

I've noticed a difference in the test tones on the avia disk versus the test tones from the denon. It was during the calibration of the sub level to the left or right speaker.

Well I got a long weekend this weekend due to MLK. Extra time to make loud strange noises from the stereo

Thanks again

Randy


Edited by Randy_Perkins (01/13/07 09:44 AM)
_________________________
Axiom M22,Ep500,Qs8,VP150, Denon 2807,1940, Sangean HDT-1X

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