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#294864 - 03/03/10 11:25 AM Re: Crackling in Speakers [Re: bagman]
pmbuko Offline
shareholder in the making

Registered: 04/02/03
Posts: 16258
Loc: Leesburg, Virginia
This Onkyo TX-SR507 5.1-channel receiver is $249.99 from Accessories4Less, a reputable store.
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#294866 - 03/03/10 11:35 AM Re: Crackling in Speakers [Re: pmbuko]
CatBrat Online   content
axiomite

Registered: 08/05/09
Posts: 5798
Loc: Some random location
Here's another choice. I bought this Pioneer VSX-819H-K 5.1 receiver for my Son and he's satisfied with it. It's $305.99 from Best Buy.

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#294869 - 03/03/10 11:48 AM Re: Crackling in Speakers [Re: CatBrat]
ClubNeon Offline
connoisseur

Registered: 02/06/09
Posts: 3448
Loc: Western Maryland, USA
The new '20 series receivers from Pioneer will be hitting soon. While I bagged the '19s the new models look to be back in the game. May want to wait around for them to start showing up at your favorite store.
_________________________
Pioneer VSX-1018AH-K, PDP-5020FD, DV-79AVi
Axiom M22s, VP150, QS8s
Sony PS3, surround backs
-Chris

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#294871 - 03/03/10 11:51 AM Re: Crackling in Speakers [Re: CatBrat]
Murph Offline
axiomite

Registered: 10/05/06
Posts: 6730
Loc: PEI, Canada
Youre welcome but don't take the quote I posted too seriously. That was more of a question than a helpful tidbit.

I shared it because it didn't make a lot of sense to me. Of course, I realize it said "equivalent of effecting the bit rate....", and didn't say it's really directly changing the bit rate as that would be a mess, so I'm curious to understand how that works, if it's true.

I also apologize for a possible derail but so far no one is biting so you are probably safe.

I do now agree you most likely need a new receiver. Unless you have a knowledgeable buddy with access to schematics and time to spare, I'm sure you would cost as much to repair as it would to buy a decent new one.


Edited by Murph (03/03/10 11:55 AM)
Edit Reason: clarity
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#294875 - 03/03/10 11:57 AM Re: Crackling in Speakers [Re: Murph]
ClubNeon Offline
connoisseur

Registered: 02/06/09
Posts: 3448
Loc: Western Maryland, USA
 Originally Posted By: Murph
I was thinking that too John. When I went searching for some info on roughly what year digital volume controls became more popular than analogue (prone to crackles,)I found this interesting statement in a short article discussing the pros and cons of both.

"A digital volume control has its own problems. Each 6dB reduction in volume from the maximum setting throws away one bit of resolution. A low volume setting (say, 30dB of attenuation) is equivalent to discarding five bits. If you had true 20-bit resolution in your D/A converter, you'd be listening to 15-bit audio instead of 20-bit. The lower the volume setting, the greater the loss in resolution. "

Anyone with better knowledge care to comment if this is still current and how relevant it is? Here is the link for reference purposes.

Volume Controls

That article misses the most common type of volume control in use these days. It isn't digital, but a digitally controlled, stepped resistance, integrated circuit. Basically the line-level signal is fed through an IC. Another set of pins on the chip select how much attenuation is applied, and a lower amplitude analog signal is passed to the output pins. Not as "pure" as a true potentiometer, but no crackles, and no loss of dynamic range.

That said, it's possible to design a very high quality digital volume control which behaves more like an analog control rather just bit shifting. Windows Vista/7 actually has one implemented as its main level control.
_________________________
Pioneer VSX-1018AH-K, PDP-5020FD, DV-79AVi
Axiom M22s, VP150, QS8s
Sony PS3, surround backs
-Chris

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