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Post by eurorom on Dec 11, 2014 19:05:10 GMT -5
Can Emotiva develop a Class A 100 watts amplifier and keep the price under 1k.
I think there is a market for such an amplifier, more so then tubes!
I prefer a good solid 100 watt amplifier in Class A over the tube amps, more control better base and better highs!
So let's hear if there is a market for this wonderfull Amplifier!
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Post by Gary Cook on Dec 11, 2014 19:30:00 GMT -5
I'm OK at 60 watts of Class A from an XPA-1, in fact I'm very happy listening to 35 watts of Class A from an XPA-1L.
Cheers
Gary
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novisnick
EmoPhile
CEO Secret Monoblock Society
Posts: 27,222 
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Post by novisnick on Dec 11, 2014 19:35:26 GMT -5
This may be just what you ordered!!  |
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Post by brians7 on Dec 11, 2014 22:29:32 GMT -5
Well may I order a pair of XPA-1L's with the user selectable Amplifier gain: 23 dB or 29 dB like on the new SA-250 please! Thank You
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Post by garbulky on Dec 11, 2014 22:50:17 GMT -5
As was mentioned a pair of XPA-1's gets you a stereo amplifier with 120 watts of class A. And an XPA-1 L gets you in at 70 watts of class A in stereo. So we have two good amps right there that do this! Probably a bit more expensive than you want. On the other hand, I heard the nakamichi stasis 100 watt class A amp and it sounded really nice.
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Post by eurorom on Dec 12, 2014 9:28:21 GMT -5
Well I meant 100w per channel and I am aware of the availability we have, however I still rememmber my old BEST amplifier I have ever own and it was the Threshold Stasis. I am just wondering if Emotiva could make one for under 1k. I think that would be the price point were it should be the bargain of the century assuming we get all the qualities that we are looking for on a great amplifier!
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Post by Gary Cook on Dec 12, 2014 15:00:31 GMT -5
Well I meant 100w per channel and I am aware of the availability we have, however I still rememmber my old BEST amplifier I have ever own and it was the Threshold Stasis. I am just wondering if Emotiva could make one for under 1k. I think that would be the price point were it should be the bargain of the century assuming we get all the qualities that we are looking for on a great amplifier! I can't say as I have ever seen a Stasis Class A only amp, what model was it? Cheers Gary |
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Post by ocezam on Dec 26, 2014 8:04:37 GMT -5
Well I meant 100w per channel Of course you did. Industry standard is to refer to power ratings per channel. It's been this way since the dawn of stereo. It greatly confuses things to refer to power by adding WPC. |
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Post by Porscheguy on Dec 26, 2014 8:31:39 GMT -5
Can Emotiva develop a Class A 100 watts amplifier and keep the price under 1k. I think there is a market for such an amplifier, more so then tubes! I prefer a good solid 100 watt amplifier in Class A over the tube amps, more control better base and better highs! So let's hear if there is a market for this wonderfull Amplifier! Can anyone "really" hear the difference between class A and A/B? Really? I can't. Either could this guy.. "Listening in Class A instead of Class A/B, I admit I did not hear a difference in the sound quality, perhaps because Class A/B mode sounded so good." www.hometheaterhifi.com/power-amplifiers/power-amplifiers-reviews/emotiva-xpa-1-gen-2-monoblock-power-amplifier-review.html |
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Post by bluemeanies on Dec 26, 2014 8:59:38 GMT -5
Can Emotiva develop a Class A 100 watts amplifier and keep the price under 1k. I think there is a market for such an amplifier, more so then tubes! I prefer a good solid 100 watt amplifier in Class A over the tube amps, more control better base and better highs! So let's hear if there is a market for this wonderfull Amplifier! Can anyone "really" hear the difference between class A and A/B? Really? I can't. Either could this guy.. "Listening in Class A instead of Class A/B, I admit I did not hear a difference in the sound quality, perhaps because Class A/B mode sounded so good." www.hometheaterhifi.com/power-amplifiers/power-amplifiers-reviews/emotiva-xpa-1-gen-2-monoblock-power-amplifier-review.htmlIMHO...NO! |
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Post by AudioHTIT on Dec 26, 2014 9:44:22 GMT -5
Can Emotiva develop a Class A 100 watts amplifier and keep the price under 1k. I think there is a market for such an amplifier, more so then tubes! I prefer a good solid 100 watt amplifier in Class A over the tube amps, more control better base and better highs! So let's hear if there is a market for this wonderfull Amplifier! Can anyone "really" hear the difference between class A and A/B? Really? I can't. Either could this guy.. "Listening in Class A instead of Class A/B, I admit I did not hear a difference in the sound quality, perhaps because Class A/B mode sounded so good." www.hometheaterhifi.com/power-amplifiers/power-amplifiers-reviews/emotiva-xpa-1-gen-2-monoblock-power-amplifier-review.htmlI think there's a difference though between not being able to hear the difference in Class A and A/B in the XPA-1G2 or XPA-1L, and hearing the difference between say a Threshold or Pass Class A amp and a comparable Class A/B amp from another manufacturer. If (like some) you belive all amps sound the same then it's moot, but it may just mean that whatever gives the XPA-1G2 it's sonic qualities lies outside of the Class A - A/B circuitry. It may also mean that the speakers used in the testing don't tax (or reveal) the amp in the way that allow the benefits to be heard. In any case I don't belive a pure Class A amp should be high on the priorities for Emotiva (and I agree with ocezam on referring to amp power properly). |
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Post by Porscheguy on Dec 26, 2014 9:58:56 GMT -5
I think there's a difference though between not being able to hear the difference in Class A and A/B in the XPA-1G2 or XPA-1L, and hearing the difference between say a Threshold or Pass Class A amp and a comparable Class A/B amp from another manufacturer. If (like some) you belive all amps sound the same then it's moot, but it may just mean that whatever gives the XPA-1G2 it's sonic qualities lies outside of the Class A - A/B circuitry. It may also mean that the speakers used in the testing don't tax (or reveal) the amp in the way that allow the benefits to be heard. In any case I don't belive a pure Class A amp should be high on the priorities for Emotiva (and I agree with ocezam on referring to amp power properly). I agree. we're not talking about some $50,000 Boulder mono bloc or even anything in the $10,000 range. I personally believe the way forward might be class D. It's gotten to the point where it might be indistinguishable from A/B. It's more compact, lighter and probably cheaper to manufacture... And that's coming from a guy who has 300 lbs. of class A/B amplification  |
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Post by vcautokid on Dec 26, 2014 11:05:46 GMT -5
I remembered the Stasis amp the PA-7. It had been around for years. Nelson Pass designed Stasis inside. I just wonder as time goes on will spares be around when it breaks though. It is the only thing that keeps me from,buying a good classic amp.
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Post by ocezam on Dec 26, 2014 13:53:54 GMT -5
Can anyone "really" hear the difference between class A and A/B? I can't. Makes a bunch of heat for no reason IMHO. |
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Post by Gary Cook on Dec 26, 2014 15:19:29 GMT -5
Can anyone "really" hear the difference between class A and A/B? Recently I've been servicing/testing 4 x XPA-1L's. So one at a time they have been on the bench and then spent about a week each in my system. I can most definitely hear a difference playing mono between one channel with an XPA-100 (Class AB) and the other with an XPA-1L (Class AB) but it's very subtle, mostly to do with speed, the XPA-1L is just a tiny bit more dynamic. With the XPA-1L in Class A there is still a difference but it's a different difference. I can hear it in the cymbals, violins and just a touch in right hand piano where Class A is cleaner. It sure as hell doesn't smack you in the face and it's not noticeable in some material, it's just not there or not that I can hear anyway. Yes, really. When I get time I'm going to start a thread listing some of the sources and tracks where I can hear the difference between Class A in an XPA-1L and Class AB. Then others can try it for themselves if they have the same material. Sounds like fun, even if it doesn't prove a thing to everyone. Happy New Year Gary |
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Post by leonski on Jan 26, 2015 3:45:35 GMT -5
Please don't forget that music is very DYNAMIC. At least the right recording. They may have from 10db UP in range. So, if you are running at 10watts RMS per amp, you 1L owners are clearly in 'A'. With a 10db peak, you are hitting about 100 a side. And with the 1L, still have ANOTHER 3+db of headroom. The spec is 250@8, so I'll let someone else do the math.
Point? The amount of TIME spent in 'A' is a LOT compared to total time. And most persons REALLY overestimate the amount of power used. Even my VERY low sensitivity panels don't crush an amp capable of around 200 a side @4ohms. I suspect a SINGLE 1L would work fine for me but biamping with a PAIR would, with the proper line level crossover, net me nearly 6 db over a single amp.
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Post by linvincible on Jan 26, 2015 7:17:40 GMT -5
Can anyone "really" hear the difference between class A and A/B? I can't. Makes a bunch of heat for no reason IMHO. exactly I did some blind switching on a couple of occasions with friends with pretty good ears, and they couldn't tell when I switched. (my amps are in a different room than my speakers so they couldn't hear me flip the switch) the only occasions I use them in class A : when I'm baking brioche! it gets the room a 5° boost and it's just perfect for the brioche dough ;o) |
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Post by jmasterj on Jan 26, 2015 12:03:52 GMT -5
Seems like we drifted from the can Emotiva develop a 100 watt/channel class A amp for under 1k question to weather or not people can actually hear the difference between Class A and Class A/B. Just for the sake of the argument it seems Emotiva has already answered that question. The 60 watts of class A you get with a pair of XPA-1's cost $2,198.00. I'm not sure but I don't think adding more class a bias would make the amp any cheaper to manufacture. So I can't see a reason why the price would be cheaper for a 100 watts/channel pure Class A amp.
As to the question can people tell the sound difference between a amp in Class A vs. a amp in Class A/B well that's subjective. It depends on the person. I have a small tube amp that's rated at 50watts/channel in class A/B switchable to 25watts/channel pure Class A. I can definitely hear a audible difference when doing a direct a/b comparison. On my amp the Class A sounds smoother more refined, while the Class A/B has more punch, and drive to it's sound signature.
I prefer the Class A/B punch, and drive. It seems to add to the dynamics of the music to me. My friend listened to the same a/b comparison and said he could not hear a difference. For some the difference, between Class A and Class A/B is important, for others not so much. Is there a market for that type of amp? Judging from the answers here it doesn't look likely.
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Post by moko on Jan 26, 2015 12:06:29 GMT -5
no wonder some people can not hear differences. well designed class AB can compete with class A push-pull amp. but if you want to test differences between class AB and class A : try single ended class A, NOT push-pull class A. class A in emo amps is push-pull one, it means the output devices (transistors) work in pairs. for purist audiophile, single ended class A is considered "the king of class A". but for me, i prefer highly biased class AB.
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