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Re: Outlaw and Emotiva products...?
SRoode #249148 02/27/09 02:54 AM
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It's a shame the XPA-2 has such a bad rep with the M80s, it's fine looking amp at a great price.


Rick


"A fear of weapons is a sign of retarded sexual and emotional maturity." Sigmund Freud

Re: Outlaw and Emotiva products...?
Micah #249149 02/27/09 02:55 AM
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 Originally Posted By: Micah
One thing I was wondering about though... I've always held an amps THD (total harmonic distortion) rating as a measure of it's quality. But when comparing the RPA-2 against the XPA-2, the RPA's THD+noise is .035 percent (not atrocious, but certainly not top notch either) and it's the so-called 'audiophile' amp of the two. Then the XPA's THD+noise is .007, and it's considered to be beefy, not the finess amp of the two. So why do all the reviews on the RPA-2 talk about the clarity as compared to the XPA-2 when it has 7 times the harmonic distortion?

That has me scratching my head.


When I was considering a power amp, these discrepancies in their descriptions had me scratching my head too. I agree with Fred that it would not be noticeable, but I was still confused that their audiophile amp had more distortion.


LFR1100 Actives,QS10HPx2,QS8x2,EP800,M3x4,M3x2 (Wood),M5HPx2 (Wood),AxiomAir,ADA1500-8,ADA1500-7
Re: Outlaw and Emotiva products...?
fredk #249155 02/27/09 03:02 AM
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 Originally Posted By: fredk
Nobody has ever been shown to be able to hear the difference between anything like .037 and .007 THD. Once you get below 1% (and considerably higher than that once you get outside our audio sweet spot) you can't tell the difference.



I see. And actually, now that I've just gone and reread it, the RPA-2 is actually rated at .015 THD, not .035. So it's only a little over twice the harmonic distortion, not 7 times. My bad.


My Stuff :

M80's
QS8's
VP150
EP800
Denon 4802
Emotiva XPA-3
Samsung BD-P3600
Sharp 65 Inch Aquos LCD
Re: Outlaw and Emotiva products...?
Wid #249157 02/27/09 03:06 AM
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 Originally Posted By: wid

It's a shame the XPA-2 has such a bad rep with the M80s, it's fine looking amp at a great price.



Not to worry, the RPA-2 is only $699, and has none of the issues the XPA-2 has with speakers. And if you believe the reviews anyway, has increadible sound and still pushes 350 watts of power to your M80's. And as efficient as they are, I'm assuming 350 watts will be PLENTY!!!

Last edited by Micah; 02/27/09 03:07 AM.

My Stuff :

M80's
QS8's
VP150
EP800
Denon 4802
Emotiva XPA-3
Samsung BD-P3600
Sharp 65 Inch Aquos LCD
Re: Outlaw and Emotiva products...?
Micah #249158 02/27/09 03:08 AM
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No need for me, mine are hooked up to a Rotel RB 1080.


Rick


"A fear of weapons is a sign of retarded sexual and emotional maturity." Sigmund Freud

Re: Outlaw and Emotiva products...?
Wid #249161 02/27/09 03:09 AM
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 Originally Posted By: wid
No need for me, mine are hooked up to a Rotel RB 1080.


What is this Rotel you speak of?


LFR1100 Actives,QS10HPx2,QS8x2,EP800,M3x4,M3x2 (Wood),M5HPx2 (Wood),AxiomAir,ADA1500-8,ADA1500-7
Re: Outlaw and Emotiva products...?
Micah #249163 02/27/09 03:16 AM
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Micah, yes I also didn't bring it up in the previous post on "driven hard", but as Steve points out now, the electrical resistivity of metals increases with temperature, by a factor known as the temperature coefficient. So, when a speaker would be driven so hard as to heat up its voice coil wiring, the impedance would increase, not decrease.

On the distortion question, it's not a question of "quality", but rather audibility. The THD figures mentioned are all far below the threshold of audibility when listening to music(generally 1.0% or more), and any review which would somehow relate these numbers to greater "clarity" has no factual basis.


-----------------------------------

Enjoy the music, not the equipment.


Re: Outlaw and Emotiva products...?
SRoode #249167 02/27/09 03:21 AM
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Rick


"A fear of weapons is a sign of retarded sexual and emotional maturity." Sigmund Freud

Re: Outlaw and Emotiva products...?
Wid #249168 02/27/09 03:22 AM
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Heh!

I know Wid! I'm always green with envy when its mentioned.


LFR1100 Actives,QS10HPx2,QS8x2,EP800,M3x4,M3x2 (Wood),M5HPx2 (Wood),AxiomAir,ADA1500-8,ADA1500-7
Re: Outlaw and Emotiva products...?
SRoode #249169 02/27/09 03:23 AM
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Oh, I thought you were serious \:\)


Rick


"A fear of weapons is a sign of retarded sexual and emotional maturity." Sigmund Freud

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