jamrock
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Post by jamrock on Mar 29, 2012 19:40:06 GMT -5
Here is the posted specification for the Elektra Theatron 7 Channel Power amplifier. Note that the ThD spec is realized with a 1000 Hz sine wave. Not at the rated output 20hz - 20KHz. Notice that Krell rejected this as a legitimate spec because it was just too lenient. The UPA-7 ThD spec is rated as the Krell. Now, I'm not saying that your amp is no good. I'm just trying to level the playing field ;D
Specifications
Power per Channel (Watts RMS)
7 Channel at 8 ohms 190
7Channel at 6 ohms 225
Dynamic Power (Watts RMS)
8 Ohms 200
4 Ohms 400
Total Harmonic Distortion THD @1khz < 0.0003%
THD <0.001% 20-20Khz
Frequency Response 3Hz - 250 kHz. +0,-3 dB
S/N Ratio 111 dB
Input types: Balanced & RCA
Single Potted Silent Power Transformer Yes
Discrete Power Amplifier Circuitry Yes
Banana Plug Compatible Speaker Connectors Yes
12V Trigger Yes
Height 160 mm Width: 445 mm Depth: 370 mm
Weight 25 kg
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Post by autocrat on Mar 29, 2012 20:29:05 GMT -5
Whatever, even the 20-20K stat is 100 times better than the UPA.
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Post by autocrat on Mar 29, 2012 20:32:01 GMT -5
Do you believe that Krell makes excellent amplifiers. Don't know, never had one. The noise floor doesn't look too special. |
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jamrock
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Post by jamrock on Mar 29, 2012 20:38:16 GMT -5
Whatever, even the 20-20K stat is 100 times better than the UPA. But at what output? Look, I'm not saying that the UPA-7 has the very best of all ThD specs. I'm simply pointing out that the bogus argument about the negatives of high gain is simply that; Bogus. because it measures the same as a far more expensive and well made amp (Krell) with the same spec. But ThD is not the only spec makes an amp great. Be well  |
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jamrock
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Post by jamrock on Mar 29, 2012 20:46:00 GMT -5
Do you believe that Krell makes excellent amplifiers. Don't know, never had one. The noise floor doesn't look too special. No disrespect. But you don't need to own a Krell to know that it is extra- terrestrial great ;D |
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Post by autocrat on Mar 29, 2012 20:47:16 GMT -5
Whatever, even the 20-20K stat is 100 times better than the UPA. But at what output? 185W/channel into 8Ohms. In some ways it's apples and oranges, the UPA test is a result hammering the amp until it reaches THD+n of 0.1%, and measuring the output at that point. Elektra test works from the power supply (1.8kW) and a nominal efficiency to calculate a maximum continuous output, and measure the THD+n at this point. You asked what was wrong with any of the specs, I just pointed out that the THD was on the high side. I said nothing about high gain, but in any case you should be able to recognise the fallacy in your argument. I can't recall anyone ever saying that it did. |
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jamrock
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Post by jamrock on Mar 29, 2012 20:59:33 GMT -5
If you think that an amp operating at full power with a ThD of >.1% is not damn good, then you just don't have a clue of what you are takling about. That is a great spec. Your amp manufacturer indicates a 20Hz - 20KHz of <0.001%. Glaringly missing with that is; at what output was the spec achieved? 10W, 20W? Any amp can do that. Don't kid yourself. Get the real test bench specs and come back.
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Post by jdskycaster on Mar 29, 2012 21:34:30 GMT -5
Elektra Theatron, you've probably never heard of it. The new version (Elektra Theatre HD) measures 0.0003% all channels driven. Remember though that these will set you back around US $5K including delivery, so we're talking an order of magnitude, for which you'd expect an improvement in the noise floor. Did I miss something on their website? The THD+N number quoted at 1KHz has no qualification that it is measured with all channels driven. If it is then it would be interesting to have the rated spec's on that amp independently tested and confirmed. I have seen more than enough amp spec's in my lifetime to know this number looks suspicious. Why? Because of this statement in their product overview: "Each channel can deliver its rated 200 Watts into 8 ohms and a peak power of 400 watts into 2 ohms to assure tremendous dynamic headroom for life-like soundtracks and special effect passages."Yet the specifications for 7 channel output at 8ohms is 190W (not 200W) and 225W at 6ohms. They state a THD+N distortion number of .0003% then they overlook 10W/ch x 7ch of total output capability? I highly doubt the output numbers they reference above are with all channels driven. Again, I would love to see these measurements verified independently. THD+N is only one data point. Where are the intermodulation distortion measurements? Slew rate measurements? Crosstalk? Just because the list price of this amp is $4499 ( "call us for a better price" - BTW) does not mean it categorically outperforms the UPA-7 in any audible (or verifiably measured) way shape or form. Just for fun I would love to hear how it would perform side by side with this 7ch. amp that just happens to list for $1K less: outlawaudio.com/products/7900.html. JD |
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jamrock
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Post by jamrock on Mar 29, 2012 21:48:05 GMT -5
Look at the deception posted for 8ohms and 4ohms loads. Not the RMS, sustained power. But dynamic power. I have never seen an amp's spec that is so capricious. LOL!
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Post by autocrat on Mar 29, 2012 22:59:44 GMT -5
You fools, you're just looking at a retailer's website. It isn't even the model that I have. Believe me, this amp will crap all over the UPA-7 not just in terms of specified test numbers, but in actual performance in any circumstances. It would want to as well, given the cost.
Gee I get sick of the fanboys on this website, normally I just jump in to correct Jamrock's rubbish, but I won't even bother to do that any more, he and this forum deserve each other.
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Post by ausman on Mar 30, 2012 0:43:38 GMT -5
autocrat, how often do you see people use 8 ohms configurations in setup..
from what I can tell don't matter what Co anyone is fond of most I find tend to use 4 ohms speakers so so it voids the point commenting on 8ohms load outs, not sure what what mains power consumption is with outlaw amps, though according to emo tech support all emo gear is tested to upto 270 vac so christ knows how much more per watt power you can get out of emo amps than what is stated and what is dynamic..
i'm neither a fan boy i'm just someone who buys emo because of emo's fair prices. whether emo is good or bad, is long as it sounds great who gives flying stuff about anyones opinion....
as long you enjoy what you're listening too it don't matter what others think...
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Post by Nemesis.ie on Mar 30, 2012 2:47:37 GMT -5
I need to get an E.E degree. How else could I forget such an important spec as the WGR. Geeesh! My humble apology to all. JD, I love you man ;D BTW, the topology may be of importance if power consumption is also a factor.  |
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Post by ausman on Mar 30, 2012 6:35:41 GMT -5
pity there isn't an xpr-3 in the mix
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Post by jdskycaster on Mar 30, 2012 9:49:43 GMT -5
You fools, you're just looking at a retailer's website. It isn't even the model that I have. Believe me, this amp will crap all over the UPA-7 not just in terms of specified test numbers, but in actual performance in any circumstances. It would want to as well, given the cost. So post the independent numbers and we can use those as a comparison instead. Anecdotal comments regarding amp performance are just that and it appears you feel that because your particular amp costs more it must be better. Participate in a blind test of capable level matched solid state amps driving the same load and see for yourself how difficult it is to pick out the most expensive piece. I have seen many who went into the experiment completely confident and were crushed when they consistently chose an amp they would never have used in their own setup and in fact crapped all over it prior to the test. JD |
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Deleted
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Post by Deleted on Mar 30, 2012 13:48:41 GMT -5
You fools, you're just looking at a retailer's website. It isn't even the model that I have. Believe me, this amp will crap all over the UPA-7 not just in terms of specified test numbers, but in actual performance in any circumstances. It would want to as well, given the cost. Gee I get sick of the fanboys on this website, normally I just jump in to correct Jamrock's rubbish, but I won't even bother to do that any more, he and this forum deserve each other. ;facepalm; We get sick of people like you claiming that you have some magical amp that sounds soooooooo much better than anything else. I got news for you topgun, if your amp sounds so much different, it's broken I'm afraid. Go post on another forum and get on with your life. |
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Post by wisconsinite on Mar 30, 2012 13:53:22 GMT -5
I have the best Amp out of all you so there  |
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Post by jdskycaster on Mar 30, 2012 14:18:01 GMT -5
I have the best Amp out of all you so there And how much did it set you back if you don't mind my askin'? |
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jamrock
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Post by jamrock on Mar 30, 2012 16:42:27 GMT -5
You fools, you're just looking at a retailer's website. It isn't even the model that I have. Believe me, this amp will crap all over the UPA-7 not just in terms of specified test numbers, but in actual performance in any circumstances. It would want to as well, given the cost. Gee I get sick of the fanboys on this website, normally I just jump in to correct Jamrock's rubbish, but I won't even bother to do that any more, he and this forum deserve each other. Wow! You really didn't need to resort to this crassness. We were simply comparing just 1 spec of amplifiers. How could you lose your cool over something so innocuous? I'm really disappointed with your juvenile outburst. BTW, in order for you to correct anyone, it is imperative that you know more about the subject than that person does. No need to withdraw from the forum. Come back and display your knowledge, we all may learn something. This is exactly what a high gain amp (JD) does to cheap components (you). It brings out the weakness. Be well my friend ;D |
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Post by arcangel on Apr 2, 2012 10:24:07 GMT -5
Hi Dan I'm new to the board, although been checking out the Emotiva gear for a while...great stuff I'm currently having the house remodeled and in the process of rebuilding a large inbuilt cupboard to house new XPR-1's when they are finally released. Do you have any info on their size? depth and height. Don't fancy finishing the space only to find they don't fit  |
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jamrock
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Post by jamrock on Apr 2, 2012 17:25:04 GMT -5
Here is the measurements for the XPA-5. I don't think that any amp gets much bigger than this. If you allow 2-3 inches for HWD, you should be good to go. I hope this helps.
Size:
unboxed: 17” wide x 7.75” high x 19” deep
boxed: 23.25" wide x 11.5" high x 24.5" deep
Weight: 76 lbs (86 lbs boxed)
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