sbelyo Posted July 10, 2013 Report Share Posted July 10, 2013 Has anyone used a Khozmo Attenuator? They look extremely well built. I wonder how it sounds compared to a goldpoint or a dact Quote Link to comment Share on other sites More sharing options...
kevin gilmore Posted July 10, 2013 Report Share Posted July 10, 2013 they have assembly issues. if you take them apart and resolder all the resistors and then carefully adjust the wipers, they should last quite a while. they are shunt devices with only 2 resistors in the circuit at any time, and do sound good. they do however as default have a common ground, which you may wish to defeat. Quote Link to comment Share on other sites More sharing options...
sbelyo Posted July 10, 2013 Author Report Share Posted July 10, 2013 Thanks, good to know. They're on sale at pcx and I thought I might give one a try but i don't really feel like resoldering all those joints Quote Link to comment Share on other sites More sharing options...
kevin gilmore Posted July 10, 2013 Report Share Posted July 10, 2013 I got one courtesy of hennyo and it took me about 2 hours to make it perfect. (not his fault) (balanced quad) Quote Link to comment Share on other sites More sharing options...
TMoney Posted July 11, 2013 Report Share Posted July 11, 2013 I have also had problems with Khozmos. One totally failed which they replaced, but now the replacement is acting up. Quote Link to comment Share on other sites More sharing options...
RiStaR Posted July 11, 2013 Report Share Posted July 11, 2013 they have assembly issues. if you take them apart and resolder all the resistors and then carefully adjust the wipers, they should last quite a while. they are shunt devices with only 2 resistors in the circuit at any time, and do sound good. they do however as default have a common ground, which you may wish to defeat. Hi Kevin, Hopefully this isn't too elementary, but I haven't been able to find possible reasons online. I've just recently soldered my own shunt attenuator and I actually wired it all to a common ground - can you share reasons why it may be necessary to defeat it? Is it to do with noise/interference? Best, Quote Link to comment Share on other sites More sharing options...
kevin gilmore Posted July 11, 2013 Report Share Posted July 11, 2013 well if you are doing balanced and the inputs are separated by a distance you might want to separate the grounds into left and right. that kind of thing. Quote Link to comment Share on other sites More sharing options...
RiStaR Posted July 11, 2013 Report Share Posted July 11, 2013 well if you are doing balanced and the inputs are separated by a distance you might want to separate the grounds into left and right. that kind of thing. Got it and thanks for clarifying Quote Link to comment Share on other sites More sharing options...
kevin gilmore Posted July 11, 2013 Report Share Posted July 11, 2013 seeing how they are built, if I had the time, I could design and build one that would never ever fail. Would have pure silver contacts et all. Would probably take 2 hours per section to assemble. Plus silly amounts of time to cast the silver pieces. Quote Link to comment Share on other sites More sharing options...
RiStaR Posted July 11, 2013 Report Share Posted July 11, 2013 seeing how they are built, if I had the time, I could design and build one that would never ever fail. Would have pure silver contacts et all. Would probably take 2 hours per section to assemble. Plus silly amounts of time to cast the silver pieces. Kevin, if you do this and leave your signature on it, I'm sure many (including me) on this forum would buy one Just out of curiosity, have you ever tried LDRs? Or do you think a digital/shunt attenuator are the best you've heard? Quote Link to comment Share on other sites More sharing options...
kevin gilmore Posted July 11, 2013 Report Share Posted July 11, 2013 you can't get a ldr to track right. no matter how hard you try. even with multiple elements and extra feedback. plus the issues with low level non-linear behavior. Quote Link to comment Share on other sites More sharing options...
sbelyo Posted July 11, 2013 Author Report Share Posted July 11, 2013 seeing how they are built, if I had the time, I could design and build one that would never ever fail. Would have pure silver contacts et all. Would probably take 2 hours per section to assemble. Plus silly amounts of time to cast the silver pieces. Now yer talkin Quote Link to comment Share on other sites More sharing options...
sbelyo Posted July 11, 2013 Author Report Share Posted July 11, 2013 I have also had problems with Khozmos. One totally failed which they replaced, but now the replacement is acting up. Hmmm.... sounds like I'll continue with my original plan of using a goldpoint Quote Link to comment Share on other sites More sharing options...
kevin gilmore Posted July 11, 2013 Report Share Posted July 11, 2013 the goldpoints are not enough steps, and are not 2 resistor shunts. same thing with the dact. that is if you want to be completely anal about it. Quote Link to comment Share on other sites More sharing options...
eggil Posted July 12, 2013 Report Share Posted July 12, 2013 (edited) Mine never worked. Poor workmanship. Too lazy to fix it, but I may try Edited July 12, 2013 by eggil Quote Link to comment Share on other sites More sharing options...
n_maher Posted July 12, 2013 Report Share Posted July 12, 2013 It's sad that such a critical part of the audio chain is the bane of the DIY'ers existence. There are next to no good, affordable options once you move past using the RK27. At that point it's almost an RK50 or bust situation. Quote Link to comment Share on other sites More sharing options...
Pars Posted July 12, 2013 Report Share Posted July 12, 2013 ^ Well the TKDs are better than the RK27s, but yeah, once you go beyond the sub-$100 pots, you are in for some spending Quote Link to comment Share on other sites More sharing options...
kevin gilmore Posted July 12, 2013 Report Share Posted July 12, 2013 (edited) The penny & giles pots are great too. also rk50 pricing these days. The $5k JC parasound preamp uses a rk27. pretty sad. my 8 bit digital step attenuator seems more rational. Edited July 12, 2013 by kevin gilmore Quote Link to comment Share on other sites More sharing options...
fordgtlover Posted July 12, 2013 Report Share Posted July 12, 2013 HiFi Collective in the UK sells the Tocos Cosmos pot from Japan. http://www.hificollective.co.uk/catalog/tocos-cosmos-rv24-stereo-potentiometer-p-9218.html Other than the HiFi Collective reviews on their page, I can't find any other comments about these pots. While it doesn't appear to b a high end option, it may offer an alternative to the RK27. I've picked one up to try on my KSA-5 Krell Klone build. They can be had much cheaper from the ebay. Quote Link to comment Share on other sites More sharing options...
livewire Posted July 13, 2013 Report Share Posted July 13, 2013 Meh, I don't see a Tocos quad pot. Wazzup wid dat? Quote Link to comment Share on other sites More sharing options...
luvdunhill Posted July 13, 2013 Report Share Posted July 13, 2013 Real men use shunt pots? Quote Link to comment Share on other sites More sharing options...
RiStaR Posted July 13, 2013 Report Share Posted July 13, 2013 Real men use shunt pots? Either that or aspiring "warp speed" engineers? Quote Link to comment Share on other sites More sharing options...
spritzer Posted July 13, 2013 Report Share Posted July 13, 2013 That TOCO's just looks like a cheap ceramic pot so color me skeptical. Real men use shunt pots? That's what Craig says, he even says only stupid people who don't know what they are doing use 4 gang's... Quote Link to comment Share on other sites More sharing options...
fordgtlover Posted July 13, 2013 Report Share Posted July 13, 2013 (edited) That TOCO's just looks like a cheap ceramic pot so color me skeptical. That's what Craig says, he even says only stupid people who don't know what they are doing use 4 gang's...  A Japanese part bought from a Chinese seller on ebay, how could ya go wrong? For $15, I'll give it a go. If it's not at least as good as an RK27, I'll bin it and go to plan b. Edited July 13, 2013 by fordgtlover Quote Link to comment Share on other sites More sharing options...
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