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Post by geebo on Oct 18, 2014 11:56:50 GMT -5
I have a question. I am considering purchasing 2 of the XPA-1L Gen 2 when they come out and I am kind of confused about the whole A/B switch thing. From what I have read if the switch is in the "A" position the amp will automatically switch to the "B" mode if the 35 watt threshold is meet. Then what is different when the switch is in the "A/B" position?  When in "A" position, you get class A operation up to 35 watts and higher temperatures. When in "A/B" mode, you get AB operation throughout the entire range and cooler overall operation. You'll have to decide if class A sounds better to you than AB but most here have said it's very difficult to hear any difference. That's mainly because it sounds so incredibly good in AB mode. |
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butchgo
Emo VIPs 
The Dark Side rules
Posts: 570
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Post by butchgo on Oct 18, 2014 14:28:16 GMT -5
Thank you.
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Post by novisnick on Oct 19, 2014 17:10:15 GMT -5
I use Classe A for two channel and A/B for HT, FWIW. :-)
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Post by garbulky on Oct 20, 2014 1:23:26 GMT -5
I have a question. I am considering purchasing 2 of the XPA-1L Gen 2 when they come out and I am kind of confused about the whole A/B switch thing. From what I have read if the switch is in the "A" position the amp will automatically switch to the "B" mode if the 35 watt threshold is meet. Then what is different when the switch is in the "A/B" position? The A is superior as it eliminates something called crossover notch distortion. However it will consume more power and produce more heat even when doing nothing than the A/B mode will do. A/B lowers the threshhold from 35 watts to say - 1 to two watts before it switches from A to b. We don't know what that threshhold is but it is going to be something more typical to other emotiva amps. Quite a few users have said they don't notice a difference. Either way, I've heard the XPA-1 L's and I liked what I heard  |
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Post by geebo on Oct 20, 2014 7:08:18 GMT -5
I have a question. I am considering purchasing 2 of the XPA-1L Gen 2 when they come out and I am kind of confused about the whole A/B switch thing. From what I have read if the switch is in the "A" position the amp will automatically switch to the "B" mode if the 35 watt threshold is meet. Then what is different when the switch is in the "A/B" position? The A is superior as it eliminates something called crossover notch distortion. However it will consume more power and produce more heat even when doing nothing than the A/B mode will do. A/B lowers the threshhold from 35 watts to say - 1 to two watts before it switches from A to b. We don't know what that threshhold is but it is going to be something more typical to other emotiva amps. Quite a few users have said they don't notice a difference. Either way, I've heard the XPA-1 L's and I liked what I heard There's no doubt about it. They sound marvelous in either mode. |
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butchgo
Emo VIPs
The Dark Side rules
Posts: 570
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Post by butchgo on Oct 20, 2014 9:26:27 GMT -5
Thanks guys!!!! |
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Post by illusion on Oct 20, 2014 15:35:17 GMT -5
I have had my 2 XPA-1-L monoblocks for just about a month, they really do go 'thwaack!'.
Just one little bug bear, my peak lights are not operating.
Seems this is not an uncommon fault, anybody else experiencing this fault?
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Post by dac0964 on Oct 20, 2014 15:35:19 GMT -5
I concur with the observation of most owners of XPA-1Ls. Most of the time I don't hear any difference but sometimes I (think) I do and on other times I even thought the A/B sounded better on some music especially on the upper mid frequencies. That goes to show that either way the amp sound wonderful. I usually keep mine on the "A" just because I bought this amp specifically to hear the A-class.
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Post by novisnick on Oct 20, 2014 15:50:26 GMT -5
I have had my 2 XPA-1-L monoblocks for just about a month, they really do go 'thwaack!'. Just one little bug bear, my peak lights are not operating. Seems this is not an uncommon fault, anybody else experiencing this fault? I have purchased 4 XPA-1Ls and have not had a bit of problem with any of them. the only fault that I have found is in myself , selling the first set!  won't make that mistake again!!!!  |
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Post by dima333a on Oct 26, 2014 23:55:32 GMT -5
I have a question. I am considering purchasing 2 of the XPA-1L Gen 2 when they come out and I am kind of confused about the whole A/B switch thing. From what I have read if the switch is in the "A" position the amp will automatically switch to the "B" mode if the 35 watt threshold is meet. Then what is different when the switch is in the "A/B" position? When in "A" position, you get class A operation up to 35 watts and higher temperatures. When in "A/B" mode, you get AB operation throughout the entire range and cooler overall operation. You'll have to decide if class A sounds better to you than AB but most here have said it's very difficult to hear any difference. That's mainly because it sounds so incredibly good in AB mode. To be precise: When you flip the switch into position "A", the amplifier will opearatein Class A up to 35 Watt; everything above will be in Class AB When you flip the switch in position "AB", the apmlifier will operate in Class A up to (not defined by Emotiva) but I guess about 1 Watt or so...; everything above will be in Class AB P.S. I have had 2 XPA-1L for about a couple of two month. There is a difference between Class A and AB. In Class A it sounds a bit softer, like the edginess goes away... the difference is subtle, but sure it is there. Frankly in "AB" mode it sounds already pretty good. I use Class A only for critical listening now... mostly because I have stuck up the amps one on another and I am worried about "cooking" the top amp with all the heat. They do run quite warm even in Class AB. BTW, who knows why letter "L"? Obviously it is not for " Large", since it is more like Little borther... |
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Post by garbulky on Oct 27, 2014 0:08:36 GMT -5
When in "A" position, you get class A operation up to 35 watts and higher temperatures. When in "A/B" mode, you get AB operation throughout the entire range and cooler overall operation. You'll have to decide if class A sounds better to you than AB but most here have said it's very difficult to hear any difference. That's mainly because it sounds so incredibly good in AB mode. To be precise: When you flip the switch into position "A", the amplifier will opearatein Class A up to 35 Watt; everything above will be in Class AB When you flip the switch in position "AB", the apmlifier will operate in Class A up to (not defined by Emotiva) but I guess about 1 Watt or so...; everything above will be in Class AB P.S. I have had 2 XPA-1L for about a couple of two month. There is a difference between Class A and AB. In Class A it sounds a bit softer, like the edginess goes away... the difference is subtle, but sure it is there. Frankly in "AB" mode it sounds already pretty good. I use Class A only for critical listening now... mostly because I have stuck up the amps one on another and I am worried about "cooking" the top amp with all the heat. They do run quite warm even in Class AB. BTW, who knows why letter "L"? Obviously it is not for " Large", since it is more like Little borther... My guess, it's either Lonnie after Lonnie - it was his pet project. or little/light as in a little XPA-1. |
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Post by geebo on Oct 27, 2014 6:44:45 GMT -5
When in "A" position, you get class A operation up to 35 watts and higher temperatures. When in "A/B" mode, you get AB operation throughout the entire range and cooler overall operation. You'll have to decide if class A sounds better to you than AB but most here have said it's very difficult to hear any difference. That's mainly because it sounds so incredibly good in AB mode. To be precise: When you flip the switch into position "A", the amplifier will opearatein Class A up to 35 Watt; everything above will be in Class AB When you flip the switch in position "AB", the apmlifier will operate in Class A up to (not defined by Emotiva) but I guess about 1 Watt or so...; everything above will be in Class AB P.S. I have had 2 XPA-1L for about a couple of two month. There is a difference between Class A and AB. In Class A it sounds a bit softer, like the edginess goes away... the difference is subtle, but sure it is there. Frankly in "AB" mode it sounds already pretty good. I use Class A only for critical listening now... mostly because I have stuck up the amps one on another and I am worried about "cooking" the top amp with all the heat. They do run quite warm even in Class AB. BTW, who knows why letter "L"? Obviously it is not for " Large", since it is more like Little borther... ow profile XPA-1? |
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Post by Boomzilla on Oct 27, 2014 7:33:08 GMT -5
In the past, I've been unable to hear any difference between the Class-A and Class-AB modes of the XPA-1L (gen. 1). Most recently, however, I've started to sense a subtle difference between the two. The Class-A mode seems to have a smoother, but more prominent midrange with just the slightest loss of treble extension. The Class-AB mode seems to have a slightly more dynamic midrange with more treble extension. To put it in "Emo-speak," the Class-A mode sounds more like my XPR-2 amplifier while the Class-AB mode sounds more like my beloved XPA-2.
Has anyone else noticed a difference in the two operating modes, or am i just hearing things?
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Post by Chuck Elliot on Oct 27, 2014 8:00:01 GMT -5
In the past, I've been unable to hear any difference between the Class-A and Class-AB modes of the XPA-1L (gen. 1). Most recently, however, I've started to sense a subtle difference between the two. The Class-A mode seems to have a smoother, but more prominent midrange with just the slightest loss of treble extension. The Class-AB mode seems to have a slightly more dynamic midrange with more treble extension. To put it in "Emo-speak," the Class-A mode sounds more like my XPR-2 amplifier while the Class-AB mode sounds more like my beloved XPA-2. Has anyone else noticed a difference in the two operating modes, or am i just hearing things? I notice no difference in A vs A/B. Maybe some speakers would show this, but for me I've set it to A/B and just listen to music! |
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Post by Boomzilla on Oct 27, 2014 8:21:08 GMT -5
Thanks, Chuck - I'd think that if any speakers would reveal differences, your high-sensitivity Klipsch (and faux-Klipsch) ones would. The difference I hear is so subtle, that I'm fairly certain that I could NOT reliably tell any difference in a double-blind test. Therefore, I think that, like you, I'll just put it where I think it sounds best and leave it alone.
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Post by mgbpuff on Oct 27, 2014 9:11:56 GMT -5
The 'L' is for Lonnie. Class A is his baby!
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Post by Gary Cook on Oct 27, 2014 17:37:41 GMT -5
In the past, I've been unable to hear any difference between the Class-A and Class-AB modes of the XPA-1L (gen. 1). Most recently, however, I've started to sense a subtle difference between the two. The Class-A mode seems to have a smoother, but more prominent midrange with just the slightest loss of treble extension. The Class-AB mode seems to have a slightly more dynamic midrange with more treble extension. To put it in "Emo-speak," the Class-A mode sounds more like my XPR-2 amplifier while the Class-AB mode sounds more like my beloved XPA-2. Has anyone else noticed a difference in the two operating modes, or am i just hearing things? I had an XPA-1L for service a couple of weeks ago and tested it in my set up for a week. Unsurprisingly driving the sub woofer I noticed no difference between Class A and Class AB. But when I used it for a short time driving the LF (with one channel of the XPA-5 driving the RF) and the source set to mono I notice very subtle differences. I wouldn't describe the midrange in Class A as being "more prominent" perhaps "cleaner" and/or "clearer" might be a better description. The treble to my ears was a fraction "tighter". Overall the difference between Class A and Class AB was so small I might have simply imagined it. I'll have the second XPA-1L in for service later this week and afterwards I'll test it in my set up. See what I hear this time around. Cheers Gary |
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Post by pachieh on Oct 27, 2014 21:53:12 GMT -5
With the last version of the 1L being cleared out of the warehouse now and not for sale anymore (anyone notice the 'Reserve' button on the Emotiva site now when you try to buy them?), does this mean the *NEW* 1L is going to be FINALLY released soon? I specifically am waiting for this latest one to get released to hopefully have some more Class A power and additional binding posts (similar to the XPA-1). God I hope we are getting close!
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Post by audiosyndrome on Nov 7, 2014 23:26:25 GMT -5
With the last version of the 1L being cleared out of the warehouse now and not for sale anymore (anyone notice the 'Reserve' button on the Emotiva site now when you try to buy them?), does this mean the *NEW* 1L is going to be FINALLY released soon? I specifically am waiting for this latest one to get released to hopefully have some more Class A power and additional binding posts (similar to the XPA-1). God I hope we are getting close! The Gen 2s are up on the website. $599 reduced to $529; $476 for eClub members. Good chance I'm purchasing three next week. |
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Post by yessurf on Nov 16, 2014 11:01:57 GMT -5
My two XPA-1Ls are doing their job nicely. Together with the XDA-2 I am really happy.
I have got the impression that the longer they run the better the sound gets.
Has anybody here had the same experience or is it just imagination?
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won't make that mistake again!!!! 
