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Resistors? Is there such thing as good resistors?

post #1 of 23
2/26/10 at 3:50pm
Thread Starter 
As above.

Sorry for the dumb question but since we're having exotic boutique caps, is there such thing for resistors to be of good quality?
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post #2 of 23
2/26/10 at 4:17pm
Yes.
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post #3 of 23
2/26/10 at 4:27pm
Thread Starter 
I did do a search but i can't seem to find a thread - I used "resistors"

Can you give me the keywords to it? Thank you.
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post #4 of 23
2/26/10 at 4:27pm
Yes; if you want to search further I'd suggest searching for "boutique resistors;" searching for "good resistors" brings up this thread as the top result and then many of the DIY build threads.
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post #5 of 23
2/26/10 at 4:40pm
Boutique; audiophile; "metal film"; Dale; Kiwame...

It's only been discussed, you know, a few hundred times before.
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post #6 of 23
2/26/10 at 5:10pm
Thread Starter 
Sorry, I didn't know where to look or what you guys call it.

Thanks for the heads up.
Now time to search =)
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post #7 of 23
2/26/10 at 5:52pm
TX2575

nothing comes close for the application
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post #8 of 23
2/26/10 at 7:52pm
As with everything people have there favourites but Vishay Dale seem to be the most popular and are easy to find. Try reading here Part Lists and Suggestions
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post #9 of 23
2/26/10 at 9:42pm
There were a lot of carbon comp and carbon film resistors that were made with Boutique'iness in mind but have fallen out of production (you can still find them thou).
There are current production metal film ones like PRP PR9372, Takman, Caddock, ect.
The ones qusp mentioned (Vishay TX2575) are a "naked" version of there most advanced precision resistor (they were originally intended for sensing applications I think).
pcX has a large stock of fancy ones Parts ConneXion - The authority on hi-fi DIY parts and components
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post #10 of 23
2/27/10 at 2:41am
indeed PCX has them now and a decent range too, but 'only' 1% where buying direct from texas components you can get up to 0.005% resolution in both absolute and relative matching. hey Nattonrice ;D bad for the wallet tho
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post #11 of 23
2/27/10 at 2:57am
There have been people who've built entire amps using Caddocks and claimed to notice a big difference (improvement) between that and using standard V-D's. The expense is enormous, though, and the effect probably varies with amp design.
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post #12 of 23
2/27/10 at 4:16am
Quote:
Originally Posted by qusp View Post
bad for the wallet tho
I hate you... =P

Should be mentioned that while they offer ridiculous specs they also come bonus with an equally ridiculous price
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post #13 of 23
2/27/10 at 10:41am
Quote:
Originally Posted by nattonrice View Post
I hate you... =P

Should be mentioned that while they offer ridiculous specs they also come bonus with an equally ridiculous price
Yep, I think the TX2575 resistors cost around $20-30 each. I can see using a couple for the shunt resistors for a volume control, but using them for an entire amp seems excessive (do we really need 0.005% accurate biasing resistors, for example?).
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post #14 of 23
2/27/10 at 1:03pm
I haven't that much experience from "resistor rolling". I've tried PRP, Panasonic, Firstronics metal film and no-name carbon film. If there's an audible difference it's minor and greatly overshadowed by the coloration of the active parts (transistors, opamps) and the amplifier's design. Until you use the best transistors (Sanyo, Toshiba, Sanken), opamps (eg OPA827, AD797) and well designed amp, I don't think you should worry about resistors.
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post #15 of 23
2/27/10 at 1:34pm
Quote:
Originally Posted by MoodySteve View Post
Yep, I think the TX2575 resistors cost around $20-30 each. I can see using a couple for the shunt resistors for a volume control, but using them for an entire amp seems excessive (do we really need 0.005% accurate biasing resistors, for example?).
For the tightest set-wise and then absolute-wise matching it is around that, yup.
If you push the requested values towards the upper limit we discovered they get closer to 40 bucks a pop in small quantities... snap.
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