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Post by Wideawake on Jul 29, 2010 12:58:20 GMT -5
sid, if these red lights indicate peak maximums you must be using these to drive some serious loads. Are you trying to drown out the traffic noise in Bengaluru?  |
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Post by rixtergonzo on Oct 20, 2010 22:33:27 GMT -5
OK...Where does this one fit in.
Why do my pair of XPA-1s (I have now had them for two full weeks now) ping after I turn them off from a listening session? They sound like they are being hit on the heat sinks. Ping...Ping...Ping. The interval starts out about every couple of minutes then it will increase until it stops. The power cords are completely removed from the wall socket. One hour later and they are still pinging. Are there gremlins in there? Very annoying! I have never had an amp do this. Does anyone else have this?
Rick.
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Post by matt on Oct 20, 2010 23:34:45 GMT -5
Sounds like the same noises that a hot water baseboard makes as it changes temperature. I have a pair of XPA-1s and they do not make any such noise. I have them out in the open, stacked one on top of the other, and they power a pair of ERT-8.3's. I keep the room between 67 and 78 F. I have yet to see more than one blue LED light up.
Do you have the XPA-1's in some kind of cabinet or enclosure?
What kind of speakers are you powering and about at what level?
About what is the ambient temperature in your room?
Can you tell if both of them are making the pinging sounds or is it just one of them? If they are too close, it may be difficult to determine.
When running, does more than one blue LED come on?
I would guess that I run mine fairly lightly, but it is possible that if you have a heaver load and/or some condition that allows heat to build up, that this may be normal. If this bothers you, I am sure that if you call Emotiva that they will be happy to take your call about this.
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Post by rixtergonzo on Oct 21, 2010 11:23:25 GMT -5
Sounds like the same noises that a hot water baseboard makes as it changes temperature. I have a pair of XPA-1s and they do not make any such noise. I have them out in the open, stacked one on top of the other, and they power a pair of ERT-8.3's. I keep the room between 67 and 78 F. I have yet to see more than one blue LED light up. Do you have the XPA-1's in some kind of cabinet or enclosure? What kind of speakers are you powering and about at what level? About what is the ambient temperature in your room? Can you tell if both of them are making the pinging sounds or is it just one of them? If they are too close, it may be difficult to determine. When running, does more than one blue LED come on? I would guess that I run mine fairly lightly, but it is possible that if you have a heaver load and/or some condition that allows heat to build up, that this may be normal. If this bothers you, I am sure that if you call Emotiva that they will be happy to take your call about this. Thanks for the very good questions. Only one blue LED??? Of course I have more than one. These are some hunkin serious amps and I use them to power my B&W 802s and they drive them very well. The sound is awesome! The amps are side by side, 7 inches apart, on a bottom shelf that has no sides or enclosures. They both make the noise. The room temp was 75 F. I called EMO and they said this is a normal condition of the heat sinks expanding and contracting.  Maybe I should try removing the outer enclosure to let it breath better.  Rick. |
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Lonnie
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Post by Lonnie on Oct 21, 2010 13:14:21 GMT -5
OK...Where does this one fit in. Why do my pair of XPA-1s (I have now had them for two full weeks now) ping after I turn them off from a listening session? They sound like they are being hit on the heat sinks. Ping...Ping...Ping. The interval starts out about every couple of minutes then it will increase until it stops. The power cords are completely removed from the wall socket. One hour later and they are still pinging. Are there gremlins in there? Very annoying! I have never had an amp do this. Does anyone else have this? Rick. The XPA-1 being fully differential run warmer than the other amps, also the heatsinks are considerably larger than the other amps and are bolted to the chassis in more locations. So as the heatsink heats up certain areas of the heatsink will expand at a different rate to other areas. This will cause a small ting sound until the entire heatsink reaches a stasis point. When cooling down the reverse happens. Hope this helps.  |
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Post by sharkman on Oct 21, 2010 13:57:24 GMT -5
OK...Where does this one fit in. ...The interval starts out about every couple of minutes then it will increase until it stops. The power cords are completely removed from the wall socket. One hour later and they are still pinging. Are there gremlins in there? Very annoying! I have never had an amp do this. Does anyone else have this? Rick. Just out of curiosity, are you saying that you unplug your amps from the wall after every use? If so, I wonder if this would have a detrimental affect on the cap's ability to discharge stored energy? |
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Post by Mr. Ben on Oct 21, 2010 14:34:06 GMT -5
OK...Where does this one fit in. Why do my pair of XPA-1s (I have now had them for two full weeks now) ping after I turn them off from a listening session? They sound like they are being hit on the heat sinks. Ping...Ping...Ping. The interval starts out about every couple of minutes then it will increase until it stops. The power cords are completely removed from the wall socket. One hour later and they are still pinging. Are there gremlins in there? Very annoying! I have never had an amp do this. Does anyone else have this? Rick. The XPA-1 being fully differential run warmer than the other amps, also the heatsinks are considerably larger than the other amps and are bolted to the chassis in more locations. So as the heatsink heats up certain areas of the heatsink will expand at a different rate to other areas. This will cause a small ting sound until the entire heatsink reaches a stasis point. When cooling down the reverse happens. Hope this helps. My Aleph amp pings like this. So does the exhaust on my car. Both get pretty hot  |
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Post by matt on Oct 21, 2010 18:30:57 GMT -5
...I have yet to see more than one blue LED light up. ... ... Only one blue LED??? Of course I have more than one. ... The ERT-8.3's must be an easy load. Some day I might get a pair of Magnepan 1.7s. I plan on using the XPA-1's when that day becomes reality. Glad to hear that the heat sinks are doing their normal thing. I prefer that to fans, which can fail and let the electronics fail. |
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Post by rixtergonzo on Oct 22, 2010 8:55:29 GMT -5
OK...Where does this one fit in. ...The interval starts out about every couple of minutes then it will increase until it stops. The power cords are completely removed from the wall socket. One hour later and they are still pinging. Are there gremlins in there? Very annoying! I have never had an amp do this. Does anyone else have this? Rick. Just out of curiosity, are you saying that you unplug your amps from the wall after every use? If so, I wonder if this would have a detrimental affect on the cap's ability to discharge stored energy? Lately. Yes. Or I would use a main switch to remove all my gear from the AC power. Does it hurt the caps to keep a charge? |
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Post by rixtergonzo on Oct 22, 2010 12:14:41 GMT -5
OK...Where does this one fit in. Why do my pair of XPA-1s (I have now had them for two full weeks now) ping after I turn them off from a listening session? They sound like they are being hit on the heat sinks. Ping...Ping...Ping. The interval starts out about every couple of minutes then it will increase until it stops. The power cords are completely removed from the wall socket. One hour later and they are still pinging. Are there gremlins in there? Very annoying! I have never had an amp do this. Does anyone else have this? Rick. The XPA-1 being fully differential run warmer than the other amps, also the heatsinks are considerably larger than the other amps and are bolted to the chassis in more locations. So as the heatsink heats up certain areas of the heatsink will expand at a different rate to other areas. This will cause a small ting sound until the entire heatsink reaches a stasis point. When cooling down the reverse happens. Hope this helps. Hows come the heat sinks on EMO amps (expecially the XPA-1) are not exposed directly to the outside air? |
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Post by sharkman on Oct 22, 2010 12:26:06 GMT -5
Just out of curiosity, are you saying that you unplug your amps from the wall after every use? If so, I wonder if this would have a detrimental affect on the cap's ability to discharge stored energy? Lately. Yes. Or I would use a main switch to remove all my gear from the AC power. Does it hurt the caps to keep a charge? I don't think it does. In describing your symptoms, it seems like the amps get pretty hot, do you run them at high levels? Or are your speakers 6 or 4 ohms? I'm just trying to understand why they seem to get so hot that the sinks ping. |
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Post by rixtergonzo on Oct 23, 2010 11:43:02 GMT -5
Lately. Yes. Or I would use a main switch to remove all my gear from the AC power. Does it hurt the caps to keep a charge? I don't think it does. In describing your symptoms, it seems like the amps get pretty hot, do you run them at high levels? Or are your speakers 6 or 4 ohms? I'm just trying to understand why they seem to get so hot that the sinks ping. B&W N802 8 ohms. What is high levels? I see my LEDs peak at half way across the board. The XPA-1 is a high current device and at high current use it will become hot...No? |
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twism
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Post by twism on Oct 23, 2010 14:16:04 GMT -5
Just a quick question. I have an XPA-5 and it seems when I have my system on mute after a few minutes the amp will go into protect mode. Any reason in paticualr? I can run my system long and hard for hours if I wanted and it never goes into protect, but if I mute my system or pause a movie, etc... it seems that most of the time it will enter protect mode and its the same light flashing on the amp each time.
Anything that would explain that?
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ICBM99
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Post by ICBM99 on Nov 3, 2010 9:15:55 GMT -5
Just a quick question. I have an XPA-5 and it seems when I have my system on mute after a few minutes the amp will go into protect mode. Any reason in paticualr? I can run my system long and hard for hours if I wanted and it never goes into protect, but if I mute my system or pause a movie, etc... it seems that most of the time it will enter protect mode and its the same light flashing on the amp each time. Anything that would explain that? That is weird. Have you tried changing the inputs around to see if channel related? You said it was same channel every time, so maybe swap the RCA's from that channel with another, and see if the fault moves. It seems like your AVR is sending some sort of signal when paused or muted that the XPA doesn't like. |
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Post by DC on Nov 21, 2010 19:52:20 GMT -5
Just a quick question. I have an XPA-5 and it seems when I have my system on mute after a few minutes the amp will go into protect mode. Any reason in paticualr? I can run my system long and hard for hours if I wanted and it never goes into protect, but if I mute my system or pause a movie, etc... it seems that most of the time it will enter protect mode and its the same light flashing on the amp each time. Anything that would explain that? I have the XPA-5 & just acquired the XPA-1 for the fronts, the 5's driving the surrounds so far non of the problem of entering 'protection mode' while pausing. But 1 of the XPA-1 led had 2 bulbs that lights up perpetually & cant be switch off from behind, awaiting reply from Emo support. BTW the XPA-5 runs a little hot after 2-3 hours whereas the XPA-1 is just warm. |
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Lonnie
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Post by Lonnie on Nov 21, 2010 20:25:43 GMT -5
Just a quick question. I have an XPA-5 and it seems when I have my system on mute after a few minutes the amp will go into protect mode. Any reason in paticualr? I can run my system long and hard for hours if I wanted and it never goes into protect, but if I mute my system or pause a movie, etc... it seems that most of the time it will enter protect mode and its the same light flashing on the amp each time. Anything that would explain that? DC offset that builds a charge on the input or a bias charge on that channel that causes a low frequency oscillation. If you move the RCA cable to a different channel what happens? |
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Post by rboster on Jan 5, 2011 16:17:03 GMT -5
Okay: Here's my issue.....I have a buzz coming out of my efficient JTR 4 ohm speakers. The buzz came up after I introduced the Emotiva XPA-5 amp. I'm only hearing the buzz from the front three speakers and not the sides, which are JBL 8 ohm speakers. Equipment list: Marantz 7005 processor Emovita XPA-5 Crown 402 2 Channel Amp 3 JTR Triple 8HT front speakers (4 ohm) 4 JBL 4830a's for sides and rear (8 ohm) SVS Sub EQ 5 DIY Subs OPPO 83 BR player AT&T Uverse box Furman 15i and 7i reference power conditioner APC UPS unit for projector only Planar 8150 projector The background: Prior to the emotiva, I was using two Crest Pro amps and had a silent sound floor, with no buzz or hum. The Marantz and the previous amps were plugged into a Furman 15i Reference Power Conditioner together with no issues. The current set up has the Marantz and Emotiva plug into the same configuration. I have all power cords separated from the speaker cables running behind the equipment rack and made sure the in-ceiling lights/wires in the attic were not touching the speaker wires that run to the front three speakers. I switched out the dimmer (which did increase the buzz when the lights were turned up), to a on/off light switch. So I'm not longer using a dimmer. The equipment closet is set up on a different breaker vs the HT room's lights. I disconnected the AT&T Uverse from the wall (coax cable) to make sure it wasn't the TV signal causing the issue. I've tried cheater plugs on both the Marantz and Emotiva (though neither uses a ground plug). I switched from RCA to Balanced interconnects. I discounted all of the source components from the Marantz. None of those helped in solving the buzz issue. Here's the rub.....when I leave the Marantz processor off and turn on only the emotiva amp, I DO NOT hear the buzz in the speakers. It's only when I turn on BOTH the Marantz and the Emotiva that I hear the buzz. Could there be an imbalance between the Marantz and Emotiva?  I have a pair of 2 Channel Art Hum Eliminators coming. They will set between the Marantz balanced cables out to the Art Hum Eliminator, balanced cables running from the Art to the Emotiva. I really like the sound of the emotiva paired with the Marantz and JTR speakers. I found the Crest amps to bring a harsh (at times) sound to the upper range. The emotiva mix does not have that same harshness, but a nice smooth upper range (very musical, not bright). Anyone have any suggestions or have encountered this? The fact that the crest combo did not exhibit this issue, tells me it "shouldn't" be an existing electrical problem (I had the lutron dimmer switch in with no issues for the last 5+ years). Thanks for any and all help!! |
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Post by austinxpa2powers on Jan 12, 2011 18:16:55 GMT -5
Gotta give EMO's tech support some credit for helping me with my XPA-2.
It was showing all reds on both channels. Went here first and checked the connections/removing them. When all failed, I called EMO. Tech Support told me to remove the 8 screws on the base plate/bottom and look at the fuses. Ten minutes later I had the fuses out and the T10AL250V's tested bad. EMO is sending more fuses after a call back. I did find some 10A 5x20's at Frys to put in until I get the correct ones. She is playing solid again (4 hours non-stop). I think maybe a power surge may have knocked out the fuses?
Try calling another electronics OEM and getting help that fast!
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Post by austinxpa2powers on Jan 12, 2011 18:19:50 GMT -5
I do know that the Slow Blows (10A) I just put in may be vastly different from the transient/surge type that were in originally. I will drive with caution until I replace them.
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Post by haugesynsar on Jan 23, 2011 7:32:55 GMT -5
This morning my XPA-2 went into protection mode of some sort. Only one side, though. The main light whent amber and one side started blinking red after aprox. 10 secounds.
After learning my 7year old son some new four-letter-words, I started troubleshooting. Turning the power on and of, thinking, cursing etc, I started to look for the place I could injekt a fuse or something. I found nothing. I turned of some lights, ovens etc, but no.
Then it hit me.....I think I have read somewhere on this forum that somebody had trouble with a trigger. I pullede out the trigger from the UMC-1 and my XPA-2 was fixed.
Halleluja;-)
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I have a pair of 2 Channel Art Hum Eliminators coming. They will set between the Marantz balanced cables out to the Art Hum Eliminator, balanced cables running from the Art to the Emotiva.