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Post by Tony_Rocky_Hara on May 14, 2015 0:11:08 GMT -5
Hey guys Is this normal or even okay? I just turned on the system with volume on the pre-amp down all the way, no music. I'm hearing a grainy buzz coming from the 803D tweeters. I called emotiva, dude on the phone said it was normal and is expected from an amp that's putting out 500 watts per channel. I've never had this issue with the anthem integrated 225. Is there anything I can do to make it go away? you might have a ground loop issue |
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Post by stanlee on May 14, 2015 3:25:51 GMT -5
Hey guys Is this normal or even okay? I just turned on the system with volume on the pre-amp down all the way, no music. I'm hearing a grainy buzz coming from the 803D tweeters. I called emotiva, dude on the phone said it was normal and is expected from an amp that's putting out 500 watts per channel. I've never had this issue with the anthem integrated 225. Is there anything I can do to make it go away? you might have a ground loop issue How do I rectify the "ground loop issue" if that's indeed the case? |
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Post by jackpine on May 14, 2015 3:36:11 GMT -5
Try the amp with no input cables plugged into it(rca/xlr). Power the amp off while unplugging/plugging cables to avoid potential loud pops. Unplugged the RCA cables from amp as suggested. Heard a hiss from both tweeters and a buzz from the both mid range. Any lights on dimmer switches, computers, cordless phones ect. on the same breaker or located within ten feet or so of the amp? |
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Post by bolle on May 14, 2015 3:43:06 GMT -5
This is absolutely NOT a ground Loop issue! This would be a 50 or 60hz tone, not at all a "buzz". The latte MIGHT come from Radiation or some devices like dimmers on the line - but I think it is also inherent in the Class H design of the XPR line. My 7-350 had this also, even if it was the only powered device in the whole house...
My new amps are so silent that I don´t know if they are on or off with my ear directly at the tweeter. But this is only so after modification by the designer / developer, before the SMPS radiated slightly into the Input stage. The shielding of the product in General was improved therefore (mine were the first production prototypes)...
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Post by jcam2881 on May 14, 2015 6:43:16 GMT -5
Michael Chad is the person I spoke to over the phone at emotiva and he claims its normal for a such a powerful amp to make noise especially less than a feet away.....I find it hard to believe that emotiva's reference amp would have such basic issues that should've been rectified at the factory quality control level. Just because I don't hear the noise from more than a feet away doesn't mean it's good for my speakers does it? especially the diamond tweeters. My experience - was curious before I purchased the XPA 5- I checked for a buzz from the Marantz - small hiss when ear is literally 6" away .. Same with the XPA 5 and now the same with the XPR-5. Makes zero difference when I put music on and never gets louder at any point.. I don't listen to anything at less than that distance other than headphones. Happy with the XPR-5 I own. Joe |
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Post by geebo on May 14, 2015 8:06:29 GMT -5
From one of your previous posts you seem to really like the amp: "Been listening to some familiar tunes via my brand new XPR 5 and 803D's.....all I have to say is God almighty WOW..... I simply could not believe the fidelity, clarity, loudness without harshness, superb instrument separations, transparency and all that tight defined bass that I've been missing!!! I don't care what anyone says about amps, only one rule applies in my experience, more power is always better. Always over power your speakers. In my case, I could still push the 803D's about 50% more perhaps with the XPR 1's or 2's in the future."
I would rather have a great sounding amp with almost unlimited dynamics that had a hiss/buzz I could hear from 1 foot away than a lesser performing amp that's quiet at 1 foot. I care how it sounds in my listening position first and foremost. I never listen from 1 foot away with no music playing. Just enjoy the music like you've described in you previous post, it'll be alright. Maybe try a CMX-6. emotiva.com/products/accessories/cmx-6 |
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Post by pedrocols on May 14, 2015 8:28:13 GMT -5
I would not be very happy myself if I spend over 2k on an amp and have to deal with this...just saying..
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Lsc
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Post by Lsc on May 14, 2015 12:14:23 GMT -5
I would not be very happy myself if I spend over 2k on an amp and have to deal with this...just saying.. Returning it is always an option but I wouldn't recommended that for this trivial non-factor. I have the exact same thing and I don't think twice about it bc it's normal to hear a little hissing from speakers < 1ft away. |
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Post by pedrocols on May 14, 2015 12:24:21 GMT -5
I would not be very happy myself if I spend over 2k on an amp and have to deal with this...just saying.. Returning it is always an option but I wouldn't recommended that for this trivial non-factor. I have the exact same thing and I don't think twice about it bc it's normal to hear a little hissing from speakers < 1ft away. I would not be very happy either about having to return a 100 pounds amp and having to pay for shipping. I agree with your point but "trivial" can be as subjective as audio, however. |
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Post by tchaik on May 14, 2015 12:55:45 GMT -5
my issue was not a hiss which i have heard on every amp i have ever owned when putting the ear right up to the driver. mine was definitely a distinct buzz heard farther out into the room. in fact it was my wife who first complained about it and the tech guys at emotiva did find a problem. one was a cold solder joint and the other was an (i don't remember because i am having senior moment).
btw. I've owned krell, audio research, hafler, carver, emotive, spectral and amps of all varieties. class a, class a/b, tube, solid state etc…
my comment 'dead quiet' assumes a reasonable distance from the driver.
tchaik……………
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jlamo
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Post by jlamo on May 14, 2015 14:02:28 GMT -5
I recently replaced my speakers from thiels to Tektons and as soon as I did I heard a tweeter noise issue in the Tektons that was not there at all in the thiels. Come to find out that the wire going to the ebox one kinect crossed over some rca wires behind the equipment and was the cause. Also the kinect device caused grainy picture when I used the apps like Netflix in the xbox1 and put that device somewhere else and that fixed that. Can't tell you why the thiels were not effected but .....is what it is.
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Post by sonicseeker on May 14, 2015 16:42:06 GMT -5
I here no noticeable hiss or noise coming from my speakers with the XPR-5, and my Tektons are pretty sensitive, but I have had some pretty expensive products in the past and most all of them did exhibit a hiss from the tweeters when my ear was placed next to them.
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Lsc
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Post by Lsc on May 14, 2015 16:42:54 GMT -5
Returning it is always an option but I wouldn't recommended that for this trivial non-factor. I have the exact same thing and I don't think twice about it bc it's normal to hear a little hissing from speakers < 1ft away. I would not be very happy either about having to return a 100 pounds amp and having to pay for shipping. I agree with your point but "trivial" can be as subjective as audio, however. Yes I agree that it's really subjective and for those with very deep pockets can spends tens of thousands on equipment and cables that may result in reduced overall noise. The trivial comment really applies to me because that's my personal opinion. I just felt that by sharing my feelings on what appears to be the same situation we both have (hiss/noise from 1 foot or less), that the OP can possibly see it my way and just enjoy the music from normal listening distances. Maybe a visit to a local high end store to check on this situation with high end amps and speakers can perhaps put his mind at ease. I'm hoping for a good resolution from my fellow XPR-5 owner.  |
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Post by pedrocols on May 14, 2015 16:54:32 GMT -5
I would not be very happy either about having to return a 100 pounds amp and having to pay for shipping. I agree with your point but "trivial" can be as subjective as audio, however. Yes I agree that it's really subjective and for those with very deep pockets can spends tens of thousands on equipment and cables that may result in reduced overall noise. The trivial comment really applies to me because that's my personal opinion. I just felt that by sharing my feelings on what appears to be the same situation we both have (hiss/noise from 1 foot or less), that the OP can possibly see it my way and just enjoy the music from normal listening distances. Maybe a visit to a local high end store to check on this situation with high end amps and speakers can perhaps put his mind at ease. I'm hoping for a good resolution from my fellow XPR-5 owner. Precisely! However, like I mentioned, I would not be happy with the situation regardless of amp brand. Once my OCD kicks in the the battle is on..... |
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Post by lhracing on May 14, 2015 17:19:46 GMT -5
I have a XPA-5 that had a slight hiss in the surrounds which you had to be very close to the speaker to hear. When I installed my XMC-1 I used the balanced connections and all of the hiss went away. I cannot tell you if the hiss was coming from the older UMC-1 or the unbalanced connections but it is gone. If you are not using balanced connections and have the capability you may want to give it a try.
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Post by stanlee on May 14, 2015 19:08:06 GMT -5
Unplugged the RCA cables from amp as suggested. Heard a hiss from both tweeters and a buzz from the both mid range. Any lights on dimmer switches, computers, cordless phones ect. on the same breaker or located within ten feet or so of the amp? I had a electrician wire a dedicated 12 awg line straight from the box with a 20 amp breaker and 20 amp outlet as suggested by Emotiva. Nothing is connected to the XPR outlet except for the XPR alone. There are other outlets nearby powering other audio equipments but even with all the other equipments turned off and only the XPR turned on. There is noise. |
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Post by stanlee on May 14, 2015 19:43:02 GMT -5
I would not be very happy either about having to return a 100 pounds amp and having to pay for shipping. I agree with your point but "trivial" can be as subjective as audio, however. Yes I agree that it's really subjective and for those with very deep pockets can spends tens of thousands on equipment and cables that may result in reduced overall noise. The trivial comment really applies to me because that's my personal opinion. I just felt that by sharing my feelings on what appears to be the same situation we both have (hiss/noise from 1 foot or less), that the OP can possibly see it my way and just enjoy the music from normal listening distances. Maybe a visit to a local high end store to check on this situation with high end amps and speakers can perhaps put his mind at ease. I'm hoping for a good resolution from my fellow XPR-5 owner. I hope you're right lsc. I will take a drive to magnolia A/V and see if the Mac's do the same thing with their 803D's. Before I decided on an amp, I was seriously debating between the MC8207 and the XPR 5. I decided on the XPR for its power, price and positive reviews. And since it is their reference line, I just wasn't expecting any noise. Could I live with it? Sure. But will it bother me knowing it's there? Yes. Will I purchase another Emotiva gear? Probably not. |
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Post by stanlee on May 14, 2015 19:47:00 GMT -5
Yes I agree that it's really subjective and for those with very deep pockets can spends tens of thousands on equipment and cables that may result in reduced overall noise. The trivial comment really applies to me because that's my personal opinion. I just felt that by sharing my feelings on what appears to be the same situation we both have (hiss/noise from 1 foot or less), that the OP can possibly see it my way and just enjoy the music from normal listening distances. Maybe a visit to a local high end store to check on this situation with high end amps and speakers can perhaps put his mind at ease. I'm hoping for a good resolution from my fellow XPR-5 owner. Precisely! However, like I mentioned, I would not be happy with the situation regardless of amp brand. Once my OCD kicks in the the battle is on..... Yup my OCD is on over drive ever since I discovered the problem.....LOL |
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Post by stanlee on May 14, 2015 19:50:40 GMT -5
I have a XPA-5 that had a slight hiss in the surrounds which you had to be very close to the speaker to hear. When I installed my XMC-1 I used the balanced connections and all of the hiss went away. I cannot tell you if the hiss was coming from the older UMC-1 or the unbalanced connections but it is gone. If you are not using balanced connections and have the capability you may want to give it a try. Not yet. I wish I had xlr outputs in my pre-amp. Perhaps in the near future. But the thing is even with the RCA cables disconnected from the XPR. The noise was still present. |
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LCSeminole
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Post by LCSeminole on May 14, 2015 20:31:16 GMT -5
When I had my two dedicated 20a circuits for my home theater installed a couple of years ago, the electrician that came made a comment about some of the other circuits in my panel that were sharing neutrals, and that he wouldn't have either of my dedicated circuits sharing neutrals. Well I'm no expert in electricity, nor do I want to be, but he did say something to the effect that by not sharing neutrals that this would keep "electrical noise" on these two dedicated circuits to a bare minimum and that if I had noticed a hiss/buzz from my speakers before, that most likely they would be diminished to the point that I wouldn't notice them anymore. Anyhow, this is how I interpreted his explanation of what he did as he did ask initially what I'd be using these dedicated circuits for. Well I did notice a difference of the "electrical" noise in the shared 15a circuits I had been using before and now the dedicated 20a circuits. There is no introduced noise from turning on lights, HVAC, refrigerator, etc., etc., etc., now and there was before. I guess what I'm trying to say is there is a difference in having dedicated circuits in my case as the noise floor of my XPR-2 & XPR-5 are dead quiet with my extremely efficient Klipsch speakers and hardly noticeable with my ears within millimeters of the tweeters.
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