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Author Post dBel84 HeadWize Fanatic Joined: May 5, 2006 Locale: Portland, OR Total Posts: 425 posted 11-03-2006 11:28 AM CST (US)        |    |   Hooray!! I am so happy that this project has made it and that, hopefully soon, others will be enjoying this amp as much as I have been. A huge thanx to Runeight and AMB for making this possible. I posted in the initial Kumisa thread when I had first got the CKIII working and my opinion has not changed now that I have listened to it daily for the past few weeks. And I sure couldn't say it more eloquently than Benny himself or Olesth headwize.com/ubb/showpost.php?fnum=3&tid... whose sentiments of the original Kumisa III echo my own and they didn't have the benefit of the updated CFP output . Hopefully DaveM still follows the forum and posts his opinion of an earlier prototype that he has working. It just gets it right and you will not be disapointed. I had said to Runeight that my wife shows very little interest in this hobby of mine but she hogged the headphones when I had got the CKIII working properly and listened to a selection of her favorite music - an extreme rarity and a good testament to just how impressive the performance is. By default I had the bias set to 60mA initially as I had to change the bias resistors to allow further reduction. It sounded great but you could have cooked your breakfast on the heatsinks, I have reduced it to 35mA with no obvious reduction in sound and the heatsinks run warm. This is a relatively easy amp to build and test, the hardest part was making the boards but you lucky sods will have AMB's gorgeous creations. It has too much gain in standard configuration for the Grado's and after trying a few different values, I settled on 50R resistors which allow a good compromise to drive Grado, Sennhesier and AKG. I have been enjoying listening to it so much that I am loath to disassemble it in order to finish the chassis. ..one day perhaps. A few images of my humble attempt. The latest version has a few changes wrt to mine as it was still a developing project when I finally built this one and from what Runeight says, it should perform even better.(hard to believe but it is what it is)..dB [Edited by dBel84 on 11-03-2006 at 03:05 PM.] Attachment: C2220.jpg
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