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Post by ramatam on Dec 17, 2012 13:29:22 GMT -5
Keith and AudioHTIT,
Thank you for replies and or explanations. Very much appreciated.
KP
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Post by katjith on Dec 23, 2012 0:15:06 GMT -5
I just hooked up my brand new XPR-2 to my Polks.My other amp was a B&K that I used for the last nine years. This XPR- sounds a little on the lean side with crystal clear highs.Hopefully,it will sound better as the time goes by. Good thing is,I can turn the volume up and hear louder and louder with eo much ease with this unit.I guess,it is the power reserve.
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bina2
Seeker Of Truth
Posts: 1
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Post by bina2 on Jan 8, 2013 10:44:45 GMT -5
I can't seethe link. Please link again.
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Post by nvarchar on May 23, 2013 14:26:14 GMT -5
The link is not working.
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Post by nvarchar on May 26, 2013 12:56:38 GMT -5
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Deleted
Deleted Member
Posts: 0
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Post by Deleted on Feb 11, 2014 17:52:22 GMT -5
Has anyone compared say, Parsound amps or Adcom amps to any of Emotiva's amps? Just asking is all...anyone?
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Post by Porscheguy on Feb 11, 2014 19:43:10 GMT -5
Now here's another question about the amplifiers: Is the THD measurement strictly THD, or THD+N. If not, can the sheet be updated with some THD+N ratings? It would be pretty useful IMO. Just curious, but how exactly is this number useful? Can you actually hear the difference between inaudible and more inaudible? Really?  |
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gn0m4
Minor Hero
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Post by gn0m4 on Mar 8, 2014 12:42:35 GMT -5
Hi emotiva owners !
I think we would need a XPA-500 (or whatever name) with 5x200/220w 4Ohm or so. In my case don´t need 5x300w 4Ohm to feed my 5 speakers, UPA-500 is underpowered (5x120w 4Ohm) and 3x XPA-200 (2x240w 4Ohm) is overpriced !
Maybe a taller XPA-200 with 5 channels amplifier, same great rear connections and less price than XPA-500 would be perfect.
XPA-200 with less price and/or a new XPA-300 (3 channels) with same quality/power would be perfect too !
Hope it !
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shike
Emo VIPs 
Official Cyberpunk
Posts: 57
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Post by shike on Mar 22, 2014 20:01:20 GMT -5
Now here's another question about the amplifiers: Is the THD measurement strictly THD, or THD+N. If not, can the sheet be updated with some THD+N ratings? It would be pretty useful IMO. Just curious, but how exactly is this number useful? Can you actually hear the difference between inaudible and more inaudible? Really? That was from ages ago, I laugh that I even posted that at one time. |
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Post by garbulky on Mar 22, 2014 23:44:58 GMT -5
Hi emotiva owners ! I think we would need a XPA-500 (or whatever name) with 5x200/220w 4Ohm or so. In my case don´t need 5x300w 4Ohm to feed my 5 speakers, UPA-500 is underpowered (5x120w 4Ohm) and 3x XPA-200 (2x240w 4Ohm) is overpriced ! Maybe a taller XPA-200 with 5 channels amplifier, same great rear connections and less price than XPA-500 would be perfect. XPA-200 with less price and/or a new XPA-300 (3 channels) with same quality/power would be perfect too ! Hope it ! We had one called the UPA-5 (not UPA-500). It was pretty beastly. |
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Post by Nodscene on Mar 23, 2014 8:58:31 GMT -5
Yeah, the UPA-5 and UPA-7 were close to those figures in 4ohm. I never really understood why they discontinued them although they did say it was due to poor sales. Of course it wasn't long after when they released the new line. I'm really happy with my UPA-7 and glad I got it when I did.
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gn0m4
Minor Hero
Posts: 12
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Post by gn0m4 on Apr 5, 2014 5:48:22 GMT -5
We need a 3 channels amplifier to LCR Speakers... just to plugin with a Fusion AV for rear channels !
Something like XPA-300 and UPA-300 please !
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Post by dazza on Jul 27, 2014 11:02:13 GMT -5
I wanna make use of the discount offer before the end of the month, but I'm torn between the XPR-2 or 2 XPA-1s. I'm looking at using these to drive my fronts (Focus SEs) independent of my HT setup for 2channel listening. The pre-amp will be the XMC-1, eventually.
Help, advice or just someone's two cents worth would be most helpful.
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Post by novisnick on Jul 27, 2014 11:09:04 GMT -5
I wanna make use of the discount offer before the end of the month, but I'm torn between the XPR-2 or 2 XPA-1s. I'm looking at using these to drive my fronts (Focus SEs) independent of my HT setup for 2channel listening. The pre-amp will be the XMC-1, eventually. Help, advice or just someone's two cents worth would be most helpful. MONOBLOCKS ,,,,,,,,!!!!!!!!!! NUFF said. |
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Post by dazza on Jul 27, 2014 11:47:52 GMT -5
Straight to the point, can't argue with that.
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Post by memotiva on Oct 27, 2014 2:51:38 GMT -5
Has anyone compared say, Parsound amps or Adcom amps to any of Emotiva's amps? Just asking is all...anyone? All amps inside of their linear range sound the same. You could do the comparison but it would ultimately mean nothing. Emotiva's high end amps are much cheaper than either of those, you don't have to pay a dealer markup and you can buy them from your home. |
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Post by fbczar on Oct 27, 2014 11:15:56 GMT -5
Has anyone compared say, Parsound amps or Adcom amps to any of Emotiva's amps? Just asking is all...anyone? All amps inside of their linear range sound the same. You could do the comparison but it would ultimately mean nothing. Emotiva's high end amps are much cheaper than either of those, you don't have to pay a dealer markup and you can buy them from your home. In a recent review of the XPA-1 in HometheaterHiFi.com the reviewer mentions the hiss that can be hear through the speakers when the volume is up, but nothing is playing. In another review of an ATI amplifier he is careful to mention that the ATI amp is dead quiet under the same conditions. Obviously, this hiss does not disappear during movie or music playback. Therefore, the ATI amp, which is much more expensive than the XPA-1, has a lower noise floor and greater dynamic range capability. Signal to Noise ratio effects dynamic range. If two amplifiers have dramatically different SNR levels, which would be the case with the ATI amp and the XPA-1, since one exhibits audible noise and the other does not, are you saying it makes no difference in the perceived sound quality? |
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KeithL
Administrator 
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Post by KeithL on Oct 27, 2014 14:14:49 GMT -5
Actually, it's a bit more complicated than that. Two amplifiers of similar power, with similar S/N ratios, and connected to the same speakers, and nothing else, will be equally noisy (or quiet). However, if you connect a noisy preamp to both of them, and one of the amps has more gain than the other, the one with the higher gain will now be noisier - because it is boosting the noise from the preamp more. (And, considering that our power amps don't have volume controls, clearly some sort of signal source with a volume control was connected to both for the review.) You've also got to be careful to state where the volume control was set. If, when you're listening to movies, you normally have the Volume set to -20, then it really doesn't matter at all how much hiss there is when you set the volume control to +10. To be significant, you've got to note where the volume control is set in normal use, then see how much noise you have with nothing playing, and the volume control set to that same level. If you can hear noise when the music is playing, or in the quiet spots between tracks, then of course it will affect "perceived sound quality". However, if the noise is such that it is entirely masked by what you're listening to, then it won't affect anything. (And whether hiss you can hear when there's nothing playing will be a problem will depend on things like how quiet your room is, and whether you leave your amps on when you're not listening to them - or trigger them off.) Of course, all of this depends on what you listen to. For example, if you listen to vinyl (which, at best, has a S/N of about 75 dB), then having an amp significantly quieter than that won't make much difference either. In general, our power amps are pretty quiet, but they have quite a lot of gain (especially the Gen1 models), which tends to make them not especially forgiving of noisy source equipment. All amps inside of their linear range sound the same. You could do the comparison but it would ultimately mean nothing. Emotiva's high end amps are much cheaper than either of those, you don't have to pay a dealer markup and you can buy them from your home. In a recent review of the XPA-1 in HometheaterHiFi.com the reviewer mentions the hiss that can be hear through the speakers when the volume is up, but nothing is playing. In another review of an ATI amplifier he is careful to mention that the ATI amp is dead quiet under the same conditions. Obviously, this hiss does not disappear during movie or music playback. Therefore, the ATI amp, which is much more expensive than the XPA-1, has a lower noise floor and greater dynamic range capability. Signal to Noise ratio effects dynamic range. If two amplifiers have dramatically different SNR levels, which would be the case with the ATI amp and the XPA-1, since one exhibits audible noise and the other does not, are you saying it makes no difference in the perceived sound quality? |
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Post by garbulky on Oct 27, 2014 14:40:56 GMT -5
All amps inside of their linear range sound the same. You could do the comparison but it would ultimately mean nothing. Emotiva's high end amps are much cheaper than either of those, you don't have to pay a dealer markup and you can buy them from your home. In a recent review of the XPA-1 in HometheaterHiFi.com the reviewer mentions the hiss that can be hear through the speakers when the volume is up, but nothing is playing. In another review of an ATI amplifier he is careful to mention that the ATI amp is dead quiet under the same conditions. Obviously, this hiss does not disappear during movie or music playback. Therefore, the ATI amp, which is much more expensive than the XPA-1, has a lower noise floor and greater dynamic range capability. Signal to Noise ratio effects dynamic range. If two amplifiers have dramatically different SNR levels, which would be the case with the ATI amp and the XPA-1, since one exhibits audible noise and the other does not, are you saying it makes no difference in the perceived sound quality? Well there are a few factors. First if you look at the specs emotiva lists, the XPA-1 has a healthy 1 watt SNR spec at greater than 89db for a watt. Now this is probably a-weighted which inflates the value and what secrets did was probably unweighted which is usually a lower vaue. I prefer unweighted vs some sort of curve that a-weighting lkes to do. Anyway, home theater got 78 db unweighted which isn't fantastic. However there are things that could have biased the result like their test setup, power quality etc. However usually as the power rises SNR increases and gets "better". So 1 watt and full power are two different measurements. At full power on the home theater setup it got 114db SNR. On Emotiva's probably a-weighted measurements it got 117db SNR. The ati obviously did better: at 1 watt it got 95db and near full power it made 127 db. So then you also have to look at power capability. A pair of XPA-1 gen 2's into 4 ohm speakers will push out 2000 watts of useable power in stereo. The ati multichannel amp pushes out 1200 watts in stereo at 4 ohms (possibly more as the other channels are unused). So even if the SNR may be different, the XPA-1 is providing more power and so you have to factor that in "dynamics". So thought it appears clearcut, I think there are other factors to consider for dynamics. But the ATI does win in the important 1 watt SNR - which is surprising as it is a multichannel amp vs a monoblock with its own power supply etc. |
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Post by fbczar on Oct 27, 2014 15:01:08 GMT -5
Actually, it's a bit more complicated than that. Two amplifiers of similar power, with similar S/N ratios, and connected to the same speakers, and nothing else, will be equally noisy (or quiet). However, if you connect a noisy preamp to both of them, and one of the amps has more gain than the other, the one with the higher gain will now be noisier - because it is boosting the noise from the preamp more. (And, considering that our power amps don't have volume controls, clearly some sort of signal source with a volume control was connected to both for the review.) You've also got to be careful to state where the volume control was set. If, when you're listening to movies, you normally have the Volume set to -20, then it really doesn't matter at all how much hiss there is when you set the volume control to +10. To be significant, you've got to note where the volume control is set in normal use, then see how much noise you have with nothing playing, and the volume control set to that same level. If you can hear noise when the music is playing, or in the quiet spots between tracks, then of course it will affect "perceived sound quality". However, if the noise is such that it is entirely masked by what you're listening to, then it won't affect anything. (And whether hiss you can hear when there's nothing playing will be a problem will depend on things like how quiet your room is, and whether you leave your amps on when you're not listening to them - or trigger them off.) Of course, all of this depends on what you listen to. For example, if you listen to vinyl (which, at best, has a S/N of about 75 dB), then having an amp significantly quieter than that won't make much difference either. In general, our power amps are pretty quiet, but they have quite a lot of gain (especially the Gen1 models), which tends to make them not especially forgiving of noisy source equipment. Keith, Assuming both amps are being tested using the same preamp and both are playing at the same level through the same speakers, the fact that one emits an audible hiss and one does not would seem to indicate that the amp with the lower noise floor would have greater dynamic range capability at the volume level being used for the test, right? If that is correct, would it also be true that amps have noise floors that vary with volume levels? Keith, Thanks for taking the time to comment. If two amps are tested with the same speakers, with the same preamp and at the same volume level and one has an audible hiss and one does not would the amp with the lower noise floor not have better dynamic range, at least at that volume level? Would SNR vary according to volume level? Keith, Thanks for taking the time to comment. If two amps are tested with the same speakers, with the same preamp and at the same volume level and one has an audible hiss and one does not would the amp with the lower noise floor not have better dynamic range, at least at that volume level? Would SNR vary according to volume level? |
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