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A Matter of Concern?

post #1 of 12
11/8/09 at 2:48am
Thread Starter 
I just got my Lyrix Pro, and when I put my Cowon S9 on 40/40 volume and plug it in, I hear music out of the amp even if the amp is switched off. It sort of scared the heck out of me the first time it happened.

Anyway, I understand circuits, but not amp design, so what is happening? Is this ok (i.e. something that happens but is not normally picked up be less sensitive phones (I used an hf5))? Or is there something in my amp that is touching that should not be?

Thanks,
Nkk
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post #2 of 12
11/8/09 at 3:17am
Actually it isn't uncommon to find that on portable amp. My 3MOVE is like that as well.
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post #3 of 12
11/8/09 at 3:31am
Thread Starter 
Ok., however I now have a much bigger problem. My amp has three switches. Right after I posted this, I decided to try them out. There is one labeled imp. Much to my chagrin, it does not summon an imp to do my bidding.

Anyway, when it is on off, I get this horrible distortion. I am unsure if it is clipping, as I have never really heard clipping before. But this is horrid. When imp is on, it is gone. The distortion is sort of like radio static (I am actually tempted to find a non magnetic metal and put the amp inside to see if that solves it). It happens independently of frequency.

Thanks,
Nkk
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post #4 of 12
11/8/09 at 5:08am
I thought it has 'bass', 'cross', and 'gain'? I think you might have the Mini Pro instead of Lyrix Pro. In any case, 'imp.' means impedance. Switching it on means you add more impedance to the output. basically the higher the impedance, the less likely you will notice hiss, which I believe is what you have heard when the impedance switch is turned off.
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post #5 of 12
11/8/09 at 5:49am
Thread Starter 
I just figured out the model, too. I will PM the seller.

Anyway, the Al foil does not solve my problem, so I do not think it is RFI. Also, RFI should not be effected by the impedance switch that much (going from unbearable to none).

Also, my LED does not stay on when the amp is on. If the amp is off for a while, it will come on and then quickly drain, as if it is powered by a capacitor that is only charged when the real power switch is off. How odd.

So...any suggestions?

Thanks,
Nkk
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post #6 of 12
11/8/09 at 6:00am
Hiss can either be generated by the amp or the source, there is no really way to fix it. Try lowering the volume on your Cowon to 34 or 36 and see any improvement. The LED seems more like a hardware problem, definitely contact the seller about it.
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post #7 of 12
11/8/09 at 6:06am
Thread Starter 
Its not hiss. It varies in frequency, and sounds more like radio static. It almost crackles and pops.

-Nkk
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post #8 of 12
11/8/09 at 7:04am
.
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post #9 of 12
11/8/09 at 4:15pm
i have a Lyrix Total (pro with the USB DAC inside). I dont have any of the problems you speak of here.

I can produce static in the amp if i turn it off when music is playing...the music distorts and cracks for a second before it turns off. Nothing terrible, but surely noticeable.

I think it has something to do with the power switch on the volume pot.
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post #10 of 12
11/8/09 at 7:09pm
Thread Starter 
The upper half of this post has been retracted.

On a related note, it was a battery problem. The battery, even though it measured 8.6 volts on my multimeter, was dying. I figured this out when the music actually just cut away. A new batter solved all the problems, including the light. I think I need to check my multimeter.

Thanks,
Nkk

P.S. It is a Lyrix Pro. I emailed the guy at headstage, and they said the earliest generation (of which apparently no one talks of) had the same switches as the mini.
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post #11 of 12
11/8/09 at 8:13pm
nkk, please accept my apology, my post was worthless and far from constructive. I will edit the offending article now, bad day finished off by reading lots of pointless posts, of which your original thread was not one of, led to me writing that bad taste of a post. Please accept my apologies and the best of luck in getting to the root of your amp problems.
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post #12 of 12
11/8/09 at 10:54pm
Thread Starter 
Quote:
Originally Posted by nickyboyo View Post
nkk, please accept my apology, my post was worthless and far from constructive. I will edit the offending article now, bad day finished off by reading lots of pointless posts, of which your original thread was not one of, led to me writing that bad taste of a post. Please accept my apologies and the best of luck in getting to the root of your amp problems.
We all have those days, so don't worry about it. I am sorry to hear of your bad day.

I will edit my post quoting yours, so that the material is gone for good.

-Nkk
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