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Post by aggie88 on Mar 25, 2020 14:27:25 GMT -5
I have an Emotiva XMC-1 prepro v1 and an XPA-5 amp. Recently I gave my son my Fluance turntable and purchased a restored Denon DP-59L turntable from a person who has restored dozens of them in the past few years. I am using a Schiit Mani phono preamp and the cartridge is an Audio technica MM cartridge. It was working wonderfully until a yesterday. Now when I play LP's using STEREO the sound is muddy and muffled. When I switch to DIRECT or the ALL STEREO setting the sound is fine. I can't figure out what could be the problem. Does anybody have a suggestion?
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cawgijoe
Emo VIPs 
"We made too many of the wrong mistakes." - Yogi Berra
Posts: 4,897
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Post by cawgijoe on Mar 25, 2020 14:53:51 GMT -5
I have an Emotiva XMC-1 prepro v1 and an XPA-5 amp. Recently I gave my son my Fluance turntable and purchased a restored Denon DP-59L turntable from a person who has restored dozens of them in the past few years. I am using a Schiit Mani phono preamp and the cartridge is an Audio technica MM cartridge. It was working wonderfully until a yesterday. Now when I play LP's using STEREO the sound is muddy and muffled. When I switch to DIRECT or the ALL STEREO setting the sound is fine. I can't figure out what could be the problem. Does anybody have a suggestion? Try rebooting the XMC-1 using the rear switch and see if that does anything. |
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Post by aggie88 on Mar 25, 2020 15:29:02 GMT -5
I have an Emotiva XMC-1 prepro v1 and an XPA-5 amp. Recently I gave my son my Fluance turntable and purchased a restored Denon DP-59L turntable from a person who has restored dozens of them in the past few years. I am using a Schiit Mani phono preamp and the cartridge is an Audio technica MM cartridge. It was working wonderfully until a yesterday. Now when I play LP's using STEREO the sound is muddy and muffled. When I switch to DIRECT or the ALL STEREO setting the sound is fine. I can't figure out what could be the problem. Does anybody have a suggestion? Try rebooting the XMC-1 using the rear switch and see if that does anything. Thanks. I'll try that tonight. |
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Post by aggie88 on Mar 26, 2020 6:50:55 GMT -5
I rebooted the XMC-1 and I am still having the problem. I have noticed that If I am listening to TV through an HDMI input and switch to DIRECT or STEREO, I get the same muddy, muffled sound.
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cawgijoe
Emo VIPs
"We made too many of the wrong mistakes." - Yogi Berra
Posts: 4,897
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Post by cawgijoe on Mar 26, 2020 7:02:23 GMT -5
Sorry to hear that. So it's not just with the turntable. Unless someone else has an idea, I would call Emotiva for support.
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Post by 405x5 on Mar 26, 2020 7:12:57 GMT -5
Take the external phono preamp out of the loop and see if the other issues clear up.
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Post by aggie88 on Mar 26, 2020 20:25:06 GMT -5
I disconnected the phono preamp and still have the same problem.
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Post by creimes on Mar 26, 2020 21:04:31 GMT -5
Maybe try saving your settings and then do a total reset and see if that helps that load your settings back in, you will need a USB stick.
Chad
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Post by vcautokid on Mar 26, 2020 22:37:12 GMT -5
Yeah what Chad said. Sounds like Equalization settings are wonky. Save and do a wipe and start over. Yes it is a computer, maybe some corruption.
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Post by aggie88 on Mar 27, 2020 17:42:01 GMT -5
Thanks everyone! I figured it out. A couple of weeks ago, I was searching for inexpensive ways to improve the sound on my Magnepan Super MMG speakers. I bought new HiFi Tuning fuses to replace the stock ones. They were supposedly an upgrade with gold contacts, etc. I was thinking maybe they could have blown although you can't tell visually because the fuses are painted white. I replaced the fancy fuses with the stock ones, and voila! Sounds great. What a relief.
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Post by 405x5 on Mar 27, 2020 19:43:02 GMT -5
Thanks everyone! I figured it out. A couple of weeks ago, I was searching for inexpensive ways to improve the sound on my Magnepan Super MMG speakers. I bought new HiFi Tuning fuses to replace the stock ones. They were supposedly an upgrade with gold contacts, etc. I was thinking maybe they could have blown although you can't tell visually because the fuses are painted white. I replaced the fancy fuses with the stock ones, and voila! Sounds great. What a relief. “[I bought new HiFi Tuning fuses” That’s great news....(but you’re not getting off the hook so easy (LOL). Could you elaborate on the claims made by the manufacturer of those miracle fuses.? Bill |
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Post by aggie88 on Mar 27, 2020 20:37:36 GMT -5
Oh yeah...it's embarrassing. I saw a YouTube video about a sonic advantage to changing out the stock fuses with these HiFi Tuning fuses that are about $30 for 2 of them. I didn't notice any difference and then of course they blew. I'm going to email the seller.
I've also read about modding the Magnepans (Peter Gunn mod) that costs a couple thousand dollars, a change in the crossover, or bypassing the fuses. The expensive mod would be great but if you're going to do this, you might as well buy the more expensive Maggies. The crossover change or bypassing the fuse seems too complicated for me. The cheap alternative seemed like I had "nothing to lose" so I went for it.
I may eventually get new stands for the speakers (like the Magna Risers or MagneStands) but right now I'm going to enjoy my new turntable for a bit.
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KeithL
Administrator 
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Post by KeithL on Mar 28, 2020 1:54:39 GMT -5
There is no legitimate reason to expect "expensive tuning fuses" to have any positive effect whatsoever on sound. I have never seen an argument in favor of using them that had any significant technical merit.
All functional fuses have a small amount of resistance and it is more or less inherent in the value of the fuse. It is theoretically possible that bypassing the fuse in a speaker could have an incredibly tiny effect. By bypassing the fuse you would reduce the impedance of the connection a tiny bit... and so change the damping a tiny bit. It is also theoretically possible that a specially designed fuse could have different parameters than a regular fuse.
(There's no such thing as a regular fuse.... there are actually a wide variety of slightly different types of fuses.)
However, to be quite honest, while the change could be measured by a sensitive meter, I can't imagine its being audible. And, to be equally honest, the fuse is there for a reason. Maggies are inefficient and like a lot of power... that fuse is there to keep you from melting your tweeters if you turn them up too loud. And the speakers are designed to be operated with the fuse in place. So I really wouldn't consider bypassing it to be at all a good idea.
However, I have heard it claimed that some of those "tuning fuses" are "more precise", and have a very fast response time.... This means that they may be more likely to blow if you exceed their ratings by even a tiny bit. (Some brands actually recommend using a higher value than the original slower standard fuse.)
However, since there is no reason to expect them to improve anything, there is also no reason to waste your money.
It is conceivable that a crossover modification could make a significant difference - and might even be an improvement.
However, it's also possible that altering the crossover will merely make the speaker sound different, and that difference may not be one that you prefer. (When it comes to how speakers sound, there is a significant amount of personal preference involved, so don't assume that the change will appeal to you.)
Stands can make a significant difference... both because they raise the speaker off the ground and because they change the angle... both of which affect the way a speaker sounds.
Oh yeah...it's embarrassing. I saw a YouTube video about a sonic advantage to changing out the stock fuses with these HiFi Tuning fuses that are about $30 for 2 of them. I didn't notice any difference and then of course they blew. I'm going to email the seller. I've also read about modding the Magnepans (Peter Gunn mod) that costs a couple thousand dollars, a change in the crossover, or bypassing the fuses. The expensive mod would be great but if you're going to do this, you might as well buy the more expensive Maggies. The crossover change or bypassing the fuse seems too complicated for me. The cheap alternative seemed like I had "nothing to lose" so I went for it. I may eventually get new stands for the speakers (like the Magna Risers or MagneStands) but right now I'm going to enjoy my new turntable for a bit. |
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Post by vcautokid on Mar 28, 2020 10:52:48 GMT -5
To shorten Keith's otherwise comprehensive explanation. Snake Oil. I had the Maggie's and I bypassed the fuse all together. No recommended but it is me. HiFi Fuses are mitigated overpriced junk you do not need. Right up there with expensive power cables, interconnects, or any claimed extra terrestrial nonsense. Basic electricity folks. No more, no less.
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