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Post by mam on Jul 1, 2013 11:04:05 GMT -5
how long does the xpa-1L last in class A operation before it heats up and switch to class A/B ?
any problems , suggestions with this unit ... is it worth it vs the XPA-1?
im considering the XPA-1 but its 32 db gain vs the xpa-1L ....
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Post by GreenKiwi on Jul 1, 2013 11:10:44 GMT -5
It's all based on temp and power draw.
Keep them cooled and not being driven too hard and I believe they will run class A for ever.
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Post by mam on Jul 1, 2013 11:11:40 GMT -5
so at 30 watts each with fans around them  ? |
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Post by Dark Ranger on Jul 1, 2013 11:58:31 GMT -5
Hi mam,
The XPA-1L will not trigger thermal protection under normal operation. Forced-air cooling is not required, although some owners prefer it for various reasons. I have my XPA-1L in an open, four-post rack and did not need forced-air cooling to maintain the "Class A" (high bias) mode. That said, I added a Sherbourn C-12 cooling fan to ensure the internal components stay as cool as possible and to avoid heating up the component on the shelf directly above the amplifier.
With reasonable ambient temps and a little room to breathe, the amplifier will dissipate the heat effectively for continuous operation in high bias mode.
EDIT: I have not compared the XPA-1 vs XPA-1L, but there is one member here who had both for a time. I think that was audiophill. Both amps are very good. The 35 watts of Class A on the XPA-1L, lower gain, and lower physical profile are three features that some may prefer over the XPA-1.
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Post by audiophill on Jul 1, 2013 12:43:05 GMT -5
Both amp are GREAT! I traded up the XPA-1l's to XPR-1's however. I also have the XPA-1's. That being said you can't go wrong with any of these mono blocks. I only upgraded because the XPR-1's do the first 30 watts in class A then from 30 watts to 350 watts is in A/B then 350 watts to 1750 watts is in class H. I needed the more power for the speakers i plan on buying next. I had the XPA-1L's on Klipsch speakers and they never left the class A operation, with that being said it all depends on what speakers you use. All the above mentioned amps sounded great i just no longer have the 1l's but they sounded great when i had them, but if you can afford the XPR-1's then you have best of both worlds BIG power and 30 watts of class A. If you go with the XPA-1's the first 10 watts is class A then 10 watts to 1000 is in A/B at 4 ohms.
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Post by tweed on Jul 1, 2013 13:27:06 GMT -5
Absolutely love the XPA-1l's. I'm sure it would be depend on your own system but imho to much has been made of the heat issue. I've yet to not be able to lay my hand on them for all the hippo's I want to count ;-).
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Post by mam on Jul 1, 2013 13:36:06 GMT -5
i am planning on getting the ascend sierra towers , 4 ohms , 90db efficiency ...with RAAL ribbons ... emotiva said that the xpa-1 will upgrade to better class A power and 29 db gain in the future , so i might end up waiting a bit ...
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Post by odedia on Jul 12, 2013 9:20:38 GMT -5
What sound levels are going to keep me at the class a level? Or is it not volume related at all? I have goldenear triton twos which are quite efficient. I enjoy listening at fairly high volumes, around -20db to -17db mostly. Will I always go over the threshold for class a?
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Post by monkumonku on Jul 12, 2013 9:38:06 GMT -5
I'd like to throw in my two cents, even though I don't own an XPA-1L and have no intention of buying one (which doesn't really mean anything when I say that) but I would like to suggest that for those who have one and are wondering at what point does it switch between classes, if you play your music like you normally do and don't hear a difference as the volume varies, then what difference does it make where it switches, other than for curiosity sake?  |
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Post by garbulky on Jul 12, 2013 9:41:07 GMT -5
Both amp are GREAT! I traded up the XPA-1l's to XPR-1's however. I also have the XPA-1's. That being said you can't go wrong with any of these mono blocks. I only upgraded because the XPR-1's do the first 30 watts in class A then from 30 watts to 350 watts is in A/B then 350 watts to 1750 watts is in class H. I needed the more power for the speakers i plan on buying next. I had the XPA-1L's on Klipsch speakers and they never left the class A operation, with that being said it all depends on what speakers you use. All the above mentioned amps sounded great i just no longer have the 1l's but they sounded great when i had them, but if you can afford the XPR-1's then you have best of both worlds BIG power and 30 watts of class A. If you go with the XPA-1's the first 10 watts is class A then 10 watts to 1000 is in A/B at 4 ohms. Audiophill. Where did you get that information about the XPR-1's class A mode? |
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Deleted
Deleted Member
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Post by Deleted on Jul 12, 2013 9:59:18 GMT -5
>> What sound levels are going to keep me at the class a level? Or is it not volume related at all? <<
Of *course* it's volume related, higher volume requires more power to achieve. Having said that, you might be surprised how little power it takes to achieve adequate volume levels. Providing you are using medium efficiency speakers, which the Tritons are, you may find that you are in Class A mode 75% of the time.
Frankly, all this stressing over what amp to buy strikes me as akin to fretting over how many angels can dance on the head of a pin. All of the Emo amps are very good-sounding units and the differences between them are small indeed. You would be far better served making sure that your room/speaker interface is as good as it can be - room treatments and speaker placement, Bunky! Take care of that first, and then start sweating what amp to use...
-RW-
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Post by chaosrv on Jul 12, 2013 10:45:06 GMT -5
RLW, this objective, knowledgeable and well balanced reasoning is going to get you NOWHERE in the world of audio component reviews.  |
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Post by Golden Ear on Jul 12, 2013 10:50:25 GMT -5
Both amp are GREAT! I traded up the XPA-1l's to XPR-1's however. I also have the XPA-1's. That being said you can't go wrong with any of these mono blocks. I only upgraded because the XPR-1's do the first 30 watts in class A then from 30 watts to 350 watts is in A/B then 350 watts to 1750 watts is in class H. I needed the more power for the speakers i plan on buying next. I had the XPA-1L's on Klipsch speakers and they never left the class A operation, with that being said it all depends on what speakers you use. All the above mentioned amps sounded great i just no longer have the 1l's but they sounded great when i had them, but if you can afford the XPR-1's then you have best of both worlds BIG power and 30 watts of class A. If you go with the XPA-1's the first 10 watts is class A then 10 watts to 1000 is in A/B at 4 ohms. Where did you get the information that XPR-1 first 30 watt was Class A? I can't find that information on their website. |
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Deleted
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Post by Deleted on Jul 12, 2013 11:42:46 GMT -5
>> RLW, this objective, knowledgeable and well balanced reasoning is going to get you NOWHERE in the world of audio component reviews.<<
Yeah, I know! Fortunately, Secrets is one of the more objective magazines. They stress measurements and plain old common sense. During my interview, they asked me about my opinions on cables, interconnects and such. I pretty much laid it on the line and they got a good chuckle out of my comments. I guess my strategy worked, they offered me the gig after 1 hour of speaking with me...
-RW-
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KeithL
Administrator 
Posts: 10,261
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Post by KeithL on Jul 12, 2013 11:58:06 GMT -5
All Class A/B amps operate in Class A for the first few watts or so. We don't specify the exact point at which our XPA or XPR series amps transition to Class A/B mode because it will vary depending on operating conditions (like how warmed up the amp is). Therefore, ANY number you can quote for for the transition point with them is an approximation. [The XPA-1L is specifically designed to remain in Class A mode up to a certain power level, which is why we do specify it.] Both amp are GREAT! I traded up the XPA-1l's to XPR-1's however. I also have the XPA-1's. That being said you can't go wrong with any of these mono blocks. I only upgraded because the XPR-1's do the first 30 watts in class A then from 30 watts to 350 watts is in A/B then 350 watts to 1750 watts is in class H. I needed the more power for the speakers i plan on buying next. I had the XPA-1L's on Klipsch speakers and they never left the class A operation, with that being said it all depends on what speakers you use. All the above mentioned amps sounded great i just no longer have the 1l's but they sounded great when i had them, but if you can afford the XPR-1's then you have best of both worlds BIG power and 30 watts of class A. If you go with the XPA-1's the first 10 watts is class A then 10 watts to 1000 is in A/B at 4 ohms. Where did you get the information that XPR-1 first 30 watt was Class A? I can't find that information on their website. |
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KeithL
Administrator
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Post by KeithL on Jul 12, 2013 12:06:08 GMT -5
It depends on how much power the amplifier is actually putting out - which will depend on how efficient your speakers are, how big your room is, the acoustics in your room, what type of music you listen to, and how loud you listen to it  If you knew all those numbers, you could try and calculate it, but the calculations actually get very complicated. For most people, especially with high efficiency speakers, it will probably be in Class A almost all of the time. What sound levels are going to keep me at the class a level? Or is it not volume related at all? I have goldenear triton twos which are quite efficient. I enjoy listening at fairly high volumes, around -20db to -17db mostly. Will I always go over the threshold for class a? |
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Post by milsap195 on Jul 12, 2013 12:33:31 GMT -5
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Post by audiophill on Jul 12, 2013 13:01:42 GMT -5
When i bought my second xpr-1 at the Boston show when i told one of the emotiva staff i was upgrading to the xpr-1's from the 1l's he said i would have the best of both worlds by getting the xpr-1. This is where i got the info from regarding the first 30 watts in class A then 30-350 AB, followed by 350-1750 class H. I would not say anything other than i heard at the show including that the ERC-3 is comming end of August begining of September! oops did i say that hope i'm not wrong since that was what i was told and therefore selling my erc-2 now to get the erc-3 which i liked very much!
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harri009
Emo VIPs 
ReferenceAnalog.com
Posts: 1,425
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Post by harri009 on Jul 12, 2013 14:20:26 GMT -5
It depends on how much power the amplifier is actually putting out - which will depend on how efficient your speakers are, how big your room is, the acoustics in your room, what type of music you listen to, and how loud you listen to it If you knew all those numbers, you could try and calculate it, but the calculations actually get very complicated. For most people, especially with high efficiency speakers, it will probably be in Class A almost all of the time. What sound levels are going to keep me at the class a level? Or is it not volume related at all? I have goldenear triton twos which are quite efficient. I enjoy listening at fairly high volumes, around -20db to -17db mostly. Will I always go over the threshold for class a? Keith I would say you guys need to get your facts straight amongs the employees. I emailed with one of the emotiva employees and he said the XPR-1's go straight into A/B with less than 1 watts in class A. I can provide the email. So you can't just say anything you guys want to sell the amp. It's either less than 1 or apparently up to 30. |
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Post by Gary Cook on Jul 13, 2013 20:54:22 GMT -5
It depends on how much power the amplifier is actually putting out - which will depend on how efficient your speakers are, how big your room is, the acoustics in your room, what type of music you listen to, and how loud you listen to it If you knew all those numbers, you could try and calculate it, but the calculations actually get very complicated. For most people, especially with high efficiency speakers, it will probably be in Class A almost all of the time. Keith I would say you guys need to get your facts straight amongs the employees. I emailed with one of the emotiva employees and he said the XPR-1's go straight into A/B with less than 1 watts in class A. I can provide the email. So you can't just say anything you guys want to sell the amp. It's either less than 1 or apparently up to 30. My understanding of what Keith posted is that 1 watt and/or 30 watts is/are correct answers. In some conditions it could be 1 watt, in other less stressful conditions it could be more. In Keith's previous post I thought he covered it well, if we want "guaranteed" Class A performance from an Emotiva amp then there is only one answer (currently) and that's XPA-1L. Which is exactly the point of the XPA-1L, it's unique and if we truly want Class A then the answer to me is very simple, buy XPA-1L's. Cheers Gary |
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