Deleted
Deleted Member
Posts: 0
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Post by Deleted on May 17, 2011 9:33:54 GMT -5
I believe the 4 ohm power output of the XPA-3 is 300 watts not 350.
Thanks for all the effort that went into this!
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Post by gatortank on May 17, 2011 11:19:16 GMT -5
Yep i sure will do that indeed!..Vincent said they sould be in too me by Friday?..hope?..Just a note i had an Carver... T25 back in the mid 90s.. i see lot in the Emos amps that are a lot like them Carvers..but with the much better looks..i will post as soon as i get them in and set'up..Thanks!
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Post by Nemesis.ie on May 17, 2011 12:58:24 GMT -5
 I like the look with the silver side plates removed. |
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Post by thejazzmaster on Oct 6, 2011 12:08:24 GMT -5
I like the look with the silver side plates removed. I second that. |
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Pauly
Emo VIPs 
Posts: 5,237
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Post by Pauly on Oct 6, 2011 12:10:01 GMT -5
Yes, it's a must. Very good looking with them removed.
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Post by michaels on Nov 8, 2011 11:42:59 GMT -5
The black trim kits are nice too. |
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sorbe
Sensei
"Don't cross the streams..."
Posts: 673
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Post by sorbe on May 1, 2012 16:27:25 GMT -5
Add UPA-1? Should still consider adding this to the main Emotiva site IMO.
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drmark
Minor Hero
132tb Synology Servers growing fast
Posts: 72
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Post by drmark on May 23, 2012 11:44:03 GMT -5
Anyone know what the rating of the XPA-5 and XPA-1 is for the Class A portion of the power?
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Legis
Minor Hero
Posts: 33
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Post by Legis on Jun 30, 2012 4:49:37 GMT -5
^
XPA-1 has 0,5R emitter resistors and approx. 10mV bias voltage over them. This translates to 20mA bias current per power transistor, which there are 24pcs per channel/mono = 480mA total bias current. Push-pull (complementary) amplifier operates in Class A for double it's bias current, so the Class A region is calculated with 960mA. XPA-1 being balanced amp, both amps/channels see on only half of the load's impedance, ie. driving 8R load both see 4R load. So we should calculate the bias with 960mA into 4R if we want to know how long the amp stays in Class A driving 8R speaker.
This means approx. 3.7 watts of Class A region driving a 8ohms load and 1,85 watts driving 4 ohm load etc.
XPA-5 might have smaller bias, I presume.
Btw. I think that only XPA-1 is really a "discrete" design. The pictures of the XPA-2 already show that there are op-amps used in the input buffet, yet the description says it's discrete, which it clearly is not...
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Post by Jim on Jul 4, 2012 18:47:15 GMT -5
Any thoughts on adding XPR-5 to the list?
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Post by jjmatrix on Sept 6, 2012 12:11:46 GMT -5
Add UPA-1? Should still consider adding this to the main Emotiva site IMO. Agreed; is there a reason UPA-1 is missing? One of the best product they made for music enthusiasts. By the way... great work with the PDF! Much appreciated. |
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Post by Decllan on Oct 17, 2012 23:13:11 GMT -5
Does anyone have a copy of that pdf that was posted, the link from the original post no longer works.  |
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Post by Jim on Oct 25, 2012 8:33:39 GMT -5
Does anyone have a copy of that pdf that was posted, the link from the original post no longer works. That's too bad it's missing. I'd be happy to try to build an updated version if anyone can dig up the original. |
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Post by geebo on Oct 25, 2012 9:20:42 GMT -5
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Post by Jim on Oct 25, 2012 10:19:39 GMT -5
Indeed, that does look like the original one. Sweet! I started working on an Excel version, I would have done PDF but it's a work in progress and the formatting doesn't interest me right now. I don't have all the older amps, should I add them? I included xformer and capacitance since they always interest me. Thoughts/comments/complaints/requests? Attachments:
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Post by Jim on Oct 25, 2012 10:23:31 GMT -5
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Post by dcg44s on Oct 25, 2012 11:18:53 GMT -5
Thanks geebo,this time I got smart and downloaded my own copy in case anything happens again. |
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Post by dcg44s on Oct 25, 2012 11:23:57 GMT -5
Indeed, that does look like the original one. Sweet! I started working on an Excel version, I would have done PDF but it's a work in progress and the formatting doesn't interest me right now. I don't have all the older amps, should I add them? I included xformer and capacitance since they always interest me. Thoughts/comments/complaints/requests? The computer that I'm on right now can't open the file but I'm all for adding the older models as they are even harder to find info on and everything in a single place would be very convenient. |
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LCSeminole
Global Moderator 
Res firma mitescere nescit.
Posts: 20,851
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Post by LCSeminole on Oct 25, 2012 11:39:10 GMT -5
Jim,
I actually have a copy of the original .pdf file if you'd like a copy. Just send me an e-mail address and get it to you................
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Post by Dark Ranger on Oct 25, 2012 12:21:35 GMT -5
Thoughts/comments/complaints/requests? You have PM. ;D |
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