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Post by kiwiemo on Sept 14, 2016 3:10:45 GMT -5
Hi all, or anyone, I'm waiting on my new KEF R900's to arrive, and am looking at options to drive these. In the running is the XPA-1's. In the specs it says minimum independence of 4ohms, however the kefs can go to 3.2ish ohms, will this be a problem? Or do I just settle for the XPA-2 which I see can handle 2ohm loads.
I'm kinda new at this so would be greatful for any advice. Living in New Zealand we are not without good brands, but tend to pay with a first born child to get anywhere near a good deal😈
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klinemj
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Post by klinemj on Sept 14, 2016 5:57:34 GMT -5
Call Emotiva if you are unsure, but...from past questions on this the 1's should handle things just fine. The wording on minimum of 4 ohm is, I believe, just about the speaker spec...no speaker holds to its spec across the full range/all conditions.
Again, call Emotiva if you are concerned.
Mark
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Deleted
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Post by Deleted on Sept 14, 2016 7:06:07 GMT -5
Here's a thread that pertains to the XPA-1 Gen 1 which Lonnie gave this info to the customer. I would think the Gen 2 would be the same but as klinemj stated it would be best to give Emotiva a call to confirm. Thread Link
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Post by garbulky on Sept 14, 2016 9:16:32 GMT -5
500 WRMS into 8 ohms 1000 WRMS into 4 ohms 1350 WRMS into 3.2 ohms and we are not going to recommend this in any way shape or form but it will do 1.75K WRMS into 2 ohms (but you have to run 220 into it because a 110 v line will not supply enough juice).
THD+N is 0.00086% Frequency response is from 10-150Khz (-3db) and 20-20Khz (>0.1db)
Oct. 20th., 2008 - CAUTION by Lonnie Oh it [XPA-1] has no problem running at 2 ohm if you can get enough juice into the amp. But if your speakers dip down to 2 ohm, that is a cake walk for this beast.
We won't officially state it is 2 ohm stable (or post it's specs) because whatever impedance we state as the minimum, people will always want to push it and go even lower. So if we state 4 ohms and your speakers dip to 2, no problem. But if we were to state 2, I guarantee you many would want to run it at 1 ohm and you can't get enough juice (at least in a home) to support it.
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stiehl11
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Post by stiehl11 on Sept 14, 2016 13:24:15 GMT -5
Hi all, or anyone, I'm waiting on my new KEF R900's to arrive, and am looking at options to drive these. In the running is the XPA-1's. In the specs it says minimum independence of 4ohms, however the kefs can go to 3.2ish ohms, will this be a problem? Or do I just settle for the XPA-2 which I see can handle 2ohm loads. I'm kinda new at this so would be greatful for any advice. Living in New Zealand we are not without good brands, but tend to pay with a first born child to get anywhere near a good deal😈 Granted, mine is an XPA-2, but it has no problem playing my PC-9 speakers. And, they go as low as 2.6 ohms below 80Hz.
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Post by Dan Laufman on Sept 14, 2016 13:26:37 GMT -5
2 ohm loudspeaker loads are fine. The amplifier is designed for this.
Hook it up and sit back... you'll be very pleased!
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Post by Gary Cook on Sept 14, 2016 16:12:22 GMT -5
I'm running an XPA-100 driving a nominal 4 ohm sub that gets into the 2's at some frequencies and handles it easily. An XPA-1 and 3 ohms should be a doddle.
Cheers Gary
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Post by kiwiemo on Sept 14, 2016 16:46:02 GMT -5
Thanks everyone, just as soon as all my gear turns up I will sit back and be impressed I'm sure.
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bootman
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Post by bootman on Sept 14, 2016 17:13:14 GMT -5
Those XPA series amps are beasts especially the xpa-1.
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Post by garbulky on Sept 14, 2016 17:32:42 GMT -5
Kiwi,, the XPA-1 was a purchase I am so very glad to have made. It's biggest strength (in fully balanced class A mode) is the ability to portray the room acoustics well. It also has some serious grips on the woofer and lots of speed in dynamics. It's resolving capabilities are good too. It can show you the deficiencies of all the upstream gear it's connected to.
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Post by adaboy on Sept 14, 2016 21:49:28 GMT -5
Kiwi,, the XPA-1 was a purchase I am so very glad to have made. It's biggest strength (in fully balanced class A mode) is the ability to portray the room acoustics well. It also has some serious grips on the woofer and lots of speed in dynamics. It's resolving capabilities are good too. It can show you the deficiencies of all the upstream gear it's connected to. Garbulky, can you bring them to Phoenix for a good listening session?
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Deleted
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Post by Deleted on Sept 14, 2016 22:47:30 GMT -5
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Post by garbulky on Sept 14, 2016 22:50:44 GMT -5
You found an amp that would cost a lot more if you had bought it from a regular dealership network by another brand. It's really a ridiculous amp. Try to find another amp that has ALL those specs - 60 watts class A, fully balanced, 1200 VA torroidal transformer and 1000 watts @ 4 ohms fully balanced at anywhere near the price they are asking. (It doesn't exist! Not even close! ) There's a reason Schiit Audio said they declined to compete with Emotiva's heavy iron!
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Post by deltadube on Sept 14, 2016 23:43:53 GMT -5
Hi all, or anyone, I'm waiting on my new KEF R900's to arrive, and am looking at options to drive these. In the running is the XPA-1's. In the specs it says minimum independence of 4ohms, however the kefs can go to 3.2ish ohms, will this be a problem? Or do I just settle for the XPA-2 which I see can handle 2ohm loads. I'm kinda new at this so would be greatful for any advice. Living in New Zealand we are not without good brands, but tend to pay with a first born child to get anywhere near a good deal😈 no problem.. go for the xpa 1s ...
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Post by kiwiemo on Sept 15, 2016 0:05:02 GMT -5
You found an amp that would cost a lot more if you had bought it from a regular dealership network by another brand. It's really a ridiculous amp. Try to find another amp that has ALL those specs - 60 watts class A, fully balanced, 1200 VA torroidal transformer and 1000 watts @ 4 ohms fully balanced at anywhere near the price they are asking. (It doesn't exist! Not even close! ) There's a reason Schiit Audio said they declined to compete with Emotiva's heavy iron!
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Post by kiwiemo on Sept 15, 2016 0:23:11 GMT -5
You found an amp that would cost a lot more if you had bought it from a regular dealership network by another brand. It's really a ridiculous amp. Try to find another amp that has ALL those specs - 60 watts class A, fully balanced, 1200 VA torroidal transformer and 1000 watts @ 4 ohms fully balanced at anywhere near the price they are asking. (It doesn't exist! Not even close! ) There's a reason Schiit Audio said they declined to compete with Emotiva's heavy iron!
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Post by garbulky on Sept 15, 2016 0:30:42 GMT -5
HI kwiemo, you quoted me but I didn't see a message?
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Post by leonski on Oct 11, 2016 22:16:25 GMT -5
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Post by leonski on Oct 15, 2016 13:58:33 GMT -5
Here is a thread over on AA where a discussion is in progress about CABLES causing amp problems. Some cables have Very high capacitance, and in long runs can cause problems in marginal amps. www.audioasylum.com/forums/amp/messages/21/216196.htmlSome gear is named as having marginal stability designed in. Not for me.
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