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Post by Percussionista on May 3, 2016 23:59:21 GMT -5
Yes, I know, I need to contact Emotiva support ;-) Well, things are "slow" while we wait for new Emo products, so...
I have no output on the left side for headphones, from either jack, on the DC-1 which I've had for I think about a year and a half.
1. Yes, I've tried both jacks.
2. I've tried different headphones
3. I've tried different pigtails (since the DC-1 has 3.5 jacks and my HPs are 1/4)
Various combinations of the above.
Music plays on both channels when going out to speakers, just not headphones, and it might be subjective but it seems like the right channel that is playing is not as robust as I expect it. Input in all cases is USB from the computer.
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hemster
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Post by hemster on May 4, 2016 0:19:20 GMT -5
To verify... the volume balance control on the PC isn't slid all the way over to the left channel per chance?   Do you happen to have a 3 1/ 2 mm set of earbuds you can try? Just to see if going direct and bypassing the adapters make a difference. |
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Post by Percussionista on May 4, 2016 0:34:53 GMT -5
To verify... the volume balance control on the PC isn't slid all the way over to the left channel per chance? Do you happen to have a 3 1/ 2 mm set of earbuds you can try? Just to see if going direct and bypassing the adapters make a difference. Umm, I can't find any PC balance control for left vs. right channels, just a single control for each audio device. In any case, I get L/R audio out from the DC-1 when going direct to speakers so it couldn't be a L/R balance issue. My ears are unfortunately not so balanced, the left is 10 db down from the right, last time they were measured. I also just tried plugging the HP via its pigtail directly into the HP-out of the computer - WOW - BIG clear sound all around ;-) So, it ain't the pigtail (either one), and the DC-1's right headphone channel is quite weak compared to going straight out of the HP-out jack. Another thing... I noticed that only the top right side of the DC-1 was quite warm as usual, the top left side was not even warm. I don't know if both sides should be showing heat, but I seem to remember that it was basically uniformly warm across the top. I've completely unplugged the unit to let it rest overnight and I'll try in the morning. Not lookin' good though ;-( |
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hemster
Global Moderator
Particle Manufacturer
...still listening... still watching
Posts: 51,950
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Post by hemster on May 4, 2016 0:49:31 GMT -5
To verify... the volume balance control on the PC isn't slid all the way over to the left channel per chance? Do you happen to have a 3 1/ 2 mm set of earbuds you can try? Just to see if going direct and bypassing the adapters make a difference. Umm, I can't find any PC balance control for left vs. right channels, just a single control for each audio device. In any case, I get L/R audio out from the DC-1 when going direct to speakers so it couldn't be a L/R balance issue. My ears are unfortunately not so balanced, the left is 10 db down from the right, last time they were measured. I also just tried plugging the HP via its pigtail directly into the HP-out of the computer - WOW - BIG clear sound all around ;-) So, it ain't the pigtail (either one), and the DC-1's right headphone channel is quite weak compared to going straight out of the HP-out jack. Another thing... I noticed that only the top right side of the DC-1 was quite warm as usual, the top left side was not even warm. I don't know if both sides should be showing heat, but I seem to remember that it was basically uniformly warm across the top. I've completely unplugged the unit to let it rest overnight and I'll try in the morning. Not lookin' good though ;-( There should be a control for the L/R balance on the PC. However, as you say, it doesn't sound like volume balance is the issue as it works fine direct to the speakers. Nonetheless, for interest's sake, have a look at it --> >>linky<<. Also, I can confirm that only the right side of the DC-1 is supposed to get quite warm. I can certainly feel a big difference between the left and the right side. Maybe the overnight rest would do the trick! |
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Post by Percussionista on May 4, 2016 14:26:02 GMT -5
There should be a control for the L/R balance on the PC. However, as you say, it doesn't sound like volume balance is the issue as it works fine direct to the speakers. Nonetheless, for interest's sake, have a look at it --> >>linky<<. .... Maybe the overnight rest would do the trick! Ah, hiding behind that "balance" button ;-) Well, oddly enough, even setting the right balance to 0 had zero effect. Could that be because I'm playing via foobar2000/wasapi and it has its own ideas of what to do? Hmmm... I tried playing via WMP and that balance slider worked just fine there. I'll have to play around with this so I can take advantage of the balance for my 10db ear difference. BUT, the overnight rest did not restore the left channel for headphones. I guess I will have to call Emotiva. |
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Post by Axis on May 4, 2016 15:19:57 GMT -5
Just a long shot but the DC-1 has jumbers for each headphone amp channel to change the headphone eq. Has the unit been moved around lately so possibly one of the jumbers came off ?
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Post by Percussionista on May 4, 2016 15:35:40 GMT -5
Just a long shot but the DC-1 has jumbers for each headphone amp channel to change the headphone eq. Has the unit been moved around lately so possibly one of the jumbers came off ? Well, don't know where the jumpers are, but in any case the DC-1 stays put right in front of me on the computer desk, under a monitor rack. It's pretty stationery until I need to attach something different to the back, which is rare. I noticed an interesting effect in playing with plugging in the HPs. Plug it in part way so only the first indentation catches and it plays monaural to both sides! Fully plugged in only the right side works. Well, I contacted Emo and they are sending me an RMA and instructions for warrantee return. |
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Post by Axis on May 4, 2016 15:55:30 GMT -5
"By default, the headphone output of the Stealth DC-1 is configured to have a very slight boost applied to the low bass (about 2 dB @ 20 Hz). This “bump” is common with many headphone amplifiers and headphone outputs, and is intended to compensate for the slight loss in very low bass encountered with many headphones. If you prefer an absolutely flat headphone response, you may eliminate the bump by moving two internal jumpers."   |
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Post by Percussionista on May 4, 2016 18:43:52 GMT -5
"... two internal jumpers." Well, was worth a look, but no joy in Mudville. The two jumpers appeared to be fully seated and I did press on each just to be sure. So... the unit is being packaged up and sent back for a look see. |
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