quick question: what do steeped attenuators do?
Mar 27, 2006 at 12:55 AM Thread Starter Post #1 of 7

granodemostasa

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I see these things on amps, and somehow they drive up the price..... why? isn't it just another way of controling volume?
 
Mar 27, 2006 at 1:19 AM Post #2 of 7
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They offer higher sound quality than typical potentiometers by using discrete resistors, which allows manufacturers to use a more ideal resistance and better matching between the channels. The trade-off is that you are left with a fininte number of sound levels possible, often as low as 24, which some people feel is too coarse a control. An alternative is to use an internal resistor network, whether controlled by mechanical relays (Presonus Central Station) or programmable IC's (Lavry DA10), which can offer a greater range of volume control options, while maintaining the higher quality resistors.
 
Mar 27, 2006 at 2:15 AM Post #3 of 7

bobfa

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A stepped attenuator in most cases consists of two sets of many position switches that connect different resistors for precise control. The switches are very high quality and the resistors are precision parts that are matched. They are expensive to build vs normal volume control.

http://homepages.tcp.co.uk/~nroberts/article57.pdf is a link to an article about them

http://www.marchandelec.com/att.html some commercial ones

Google it and there are a lot more examples.
 
Mar 27, 2006 at 2:27 AM Post #4 of 7

aerius

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A steeped attenuator is one that's been infused with or soaked in liquid.
tongue.gif


A stepped attenuator is what the other guys said.
 
Mar 27, 2006 at 8:16 PM Post #6 of 7

kramer5150

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Further discussion & oppinions requested...

How much of an amps audio performance and SQ is limited by the pot? Lets take a cmoy for example? Say you were too use a stepped att. in place of a panasonic or other pot... would the difference be audible?

????
Garrett
 
Mar 27, 2006 at 9:38 PM Post #7 of 7
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Well I am not sure if you could hear the difference with a CMOY, though it certainly would be foolish to put a $60+ volume control in a ~$10-15 amp. The only time I was able to compare the two in the same amp was with a dynalo, and it was a quite clear and noticeable difference (against an Alps Blue). Then again considering the prices involved, it made sense using a $60 volume control in a $250+ amp. Now you'd need more of an amp to justify the cost of a DACT, unless you just really love the way they feel.
 

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