Noble,Alps,TKD ? - Page 4

dry joint · 29th September 2012, 11:57 AM

Alps Blue Velvet to cheap attenuators, but I've had a variety of pots made from different materials and various brands and none are close to either of the Chinese stepped attenuators I've had - big one with dale resistors and really cheap surface mounted parts one, the cheap one was best. Comparing expensive pots with attenuators is like trying to find a really expensive candle that is better than an electric light. I wouldn't worry about noises when changing volume, what the sound is like when set and listening that matters.

You might want to look at removing input capacitors on the amp if the source(s) have DC blocking on their output(s), no point in putting the signal through two sets of caps.

21 clicks is not a significant problem and worth the trade off for clearer sound, attenuators simply provide a cleaner signal.

In my experience input and feedback resistors are disproportionately significant, most deisgns have an input resistor or two in either a filter or to make the amp easier to drive. Do you have a circuit diagram or know what the design is?

AudioLapDance · 29th September 2012, 12:18 PM

Quote:

Originally Posted by dry joint

One of these will be better than any pot

DACT Type 21 Stepped Attenuator Potentiometer 50K 300B | eBay
or

New 21 Step Attenuator Potentiometer 10K Log Stereo | eBay
They are the same size as regular pots.

Keep in mind those are NOT ladder attenuators but series attenuators. So you have 21 SM resistors in series ...

I have a few and they are a great value.

Cheers,
Jeff

zibra · 29th September 2012, 12:28 PM

Its single stage opamp with feedback resistor but I dont really know details that much.
Heres review of that headamp. Simple and fantastic:

High Fidelity

Im afraid its only in polish language though.

dry joint · 29th September 2012, 01:18 PM

Not sure what I have, it was from ebay a few months ago, cost £10 inc del and sounded great compared with pots and a bit better than ladder attenuator with dale resistors. I never thought smt resistors would make much of a difference, live and learn.

The quality of that feedback resistor will matter.

zibra · 3rd October 2012, 04:45 PM

OK guys I still hgavent bought anything yet as I have some doubts.
What can you say about Goldpoint stepped attenuator then and comparision to "ordinary" Noble or TKD pots?:

Compare Attenuator Types

Im even more interested in comparing Goldpoint to attenuator from ebay. Exactly this model. Anyone tried? im very curious if build quality of such attenuator is worth money over Noble and TKD and ofc to Goldpoint? Also whats SQ?

10K 24 step Attenuator Potentiometer 0.5% Takman REX25 | eBay

Im interested in that model with Takmans, not other with Dale as there is also different build quality I think.

dry joint · 3rd October 2012, 09:50 PM

You'd want the metal film Takman REY ones not carbon REX, individually the resistors cost the same retail so the seller might be able to do one.

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29th September 2012, 11:57 AM	#31
dry joint diyAudio Member Join Date: Oct 2006	Alps Blue Velvet to cheap attenuators, but I've had a variety of pots made from different materials and various brands and none are close to either of the Chinese stepped attenuators I've had - big one with dale resistors and really cheap surface mounted parts one, the cheap one was best. Comparing expensive pots with attenuators is like trying to find a really expensive candle that is better than an electric light. I wouldn't worry about noises when changing volume, what the sound is like when set and listening that matters. You might want to look at removing input capacitors on the amp if the source(s) have DC blocking on their output(s), no point in putting the signal through two sets of caps. 21 clicks is not a significant problem and worth the trade off for clearer sound, attenuators simply provide a cleaner signal. In my experience input and feedback resistors are disproportionately significant, most deisgns have an input resistor or two in either a filter or to make the amp easier to drive. Do you have a circuit diagram or know what the design is?

29th September 2012, 12:28 PM	#33
zibra diyAudio Member Join Date: Nov 2011	Its single stage opamp with feedback resistor but I dont really know details that much. Heres review of that headamp. Simple and fantastic: High Fidelity Im afraid its only in polish language though.

29th September 2012, 01:18 PM	#34
dry joint diyAudio Member Join Date: Oct 2006	Not sure what I have, it was from ebay a few months ago, cost £10 inc del and sounded great compared with pots and a bit better than ladder attenuator with dale resistors. I never thought smt resistors would make much of a difference, live and learn. The quality of that feedback resistor will matter.

3rd October 2012, 04:45 PM	#35
zibra diyAudio Member Join Date: Nov 2011	OK guys I still hgavent bought anything yet as I have some doubts. What can you say about Goldpoint stepped attenuator then and comparision to "ordinary" Noble or TKD pots?: Compare Attenuator Types Im even more interested in comparing Goldpoint to attenuator from ebay. Exactly this model. Anyone tried? im very curious if build quality of such attenuator is worth money over Noble and TKD and ofc to Goldpoint? Also whats SQ? 10K 24 step Attenuator Potentiometer 0.5% Takman REX25 \| eBay Im interested in that model with Takmans, not other with Dale as there is also different build quality I think.

3rd October 2012, 09:50 PM	#36
dry joint diyAudio Member Join Date: Oct 2006	You'd want the metal film Takman REY ones not carbon REX, individually the resistors cost the same retail so the seller might be able to do one.