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Re: Crackling in Speakers
bagman #294864 03/03/10 04:25 PM
Joined: Apr 2003
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shareholder in the making
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shareholder in the making
Joined: Apr 2003
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This Onkyo TX-SR507 5.1-channel receiver is $249.99 from Accessories4Less, a reputable store.

Re: Crackling in Speakers
pmbuko #294866 03/03/10 04:35 PM
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axiomite
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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.

Re: Crackling in Speakers
CatBrat #294869 03/03/10 04:48 PM
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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 PDP-5020FD, Marantz SR6011
Axiom M5HP, VP160HP, QS8
Sony PS4, surround backs
-Chris
Re: Crackling in Speakers
CatBrat #294871 03/03/10 04:51 PM
Joined: Oct 2006
Posts: 6,955
axiomite
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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.

Last edited by Murph; 03/03/10 04:55 PM. Reason: clarity

With great power comes Awesome irresponsibility.
Re: Crackling in Speakers
Murph #294875 03/03/10 04:57 PM
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 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 PDP-5020FD, Marantz SR6011
Axiom M5HP, VP160HP, QS8
Sony PS4, surround backs
-Chris
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