Showing 1 of 395 conversations about:
Heefty
1367
Aug 25, 2017
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Here's what I'm playing with at work today. I'm something of a Pete Millett fanboy if you couldn't tell. I just finished the nuhybrid head amp last night and I'm comparing it to one of his other designs that I enjoy.
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Aug 25, 2017
flyfisher55
30
Sep 15, 2017
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Listening to mine as we speak. Loving the Korg tube!
Sep 15, 2017
Heefty
1367
Sep 15, 2017
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Have you been able to mess with the bias on it yet? I never seem to find time. I'm a little surprised by how flat it is and I'm wondering if I can bias some more "tubeyness" in it.
Sep 15, 2017
flyfisher55
30
Sep 15, 2017
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Not really. Just left it at the recommended 11 DC V sounds good there so not playing with it need to fix my Butte Amp has a buzzing in right channel
Sep 15, 2017
Heefty
1367
Sep 15, 2017
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EMI noise getting in, or do you suspect something more nefarious? That 11x gain definitely makes a stinker for EMI sensitivity.
Sep 15, 2017
flyfisher55
30
Sep 16, 2017
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My biggest issue is isolating the amp to avoid the ringing. I've rested it on isolation pads and it seems to be doing the job. I rather listen to it than solid state but I love tubes even on my main systems.
Sep 16, 2017
flyfisher55
30
Sep 16, 2017
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i think I screwed up the board with the on board soldering. Just want to redo it and get it right
Sep 16, 2017
flyfisher55
30
Sep 16, 2017
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Do you have a favorite in terms of sound between the two Millet amps, and if so with what headphones?
Sep 16, 2017
Heefty
1367
Sep 17, 2017
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It's the same argument that always exists between tube and ss amps. Tubes are not flat, but sometimes that's fine with me. This particular tube is excellent at highlighting vocals and drawing me into them, but it seems the accompaniment is somewhat recessed. When I want to get that intimate vocal presentation the Nutube is excellent and I'll listen to it with my more neutral cans like akg k267s, he560s, or hd600s. I'm actually currently leaving it in line as a preamp for some powered monitors that have the mids a little drawn back and it's a great match for them. The Butte is a solid all arounder and I listen to it and my HD6xxs at work all day every day. I love the combo there. It's nice and flat so it really works well with everything that it isn't too powerful for. That 11x gain is killing me. I really need to get the parts rounded up to change that. I'm going to make it more like 6x and 1x switchable for iems.
Sep 17, 2017
flyfisher55
30
Sep 17, 2017
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I hear what you're saying and in thinking I love to listen to Norah Jones, Diana Krall and Adele with the Nutube. But then again it's the same with my main system. When listening to vocals I just go to the tubes system. Anything more intricate and I go to SS. I really need to fix this Butte. I need to be able to listen to it and see what I'm missing. More parts, (groan)
Sep 17, 2017
flyfisher55
30
Sep 18, 2017
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I ordered another board from Pete and parts from Mouser. Starting from scratch with the Butte. I need to hear this thing as it should be. Do you have or are you considering any other amps such as the Cavalli?
Sep 18, 2017
Heefty
1367
Sep 20, 2017
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I do have others that I like, but no Cavallis. I'm tempted by them though. I may end up with one eventually but I tend to mostly design/build my own. Pete Millett's designs are just always fascinating to me for one reason or another so I like building them to see how his features work. For instance, on the ones above, the Butte uses that CCS on the opamp, which I haven't personally seen on any other amp, and the Nutube has the Nutube.
Sep 20, 2017
flyfisher55
30
Sep 20, 2017
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Agreed. Ive been involved in audio for many years but the DIY end of it is very new to me. i find Mr. Millet‘s equipment easy to follow and well reviewed. Have you had any dealings with the o2 amp? I’m considering that build but I’m thinking it’s very similar to the Butte?
Sep 20, 2017
Heefty
1367
Sep 20, 2017
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I've built an O2 as well. It's quite different from the Butte. Depending on the usage I do like it and use it often.
I hadn't planned on using it on the go when I was building it, but I'm glad that I didn't set it up as a desktop only device. I almost always use it on battery power now.
It's not good for power hungry cans. I wouldn't use it for anything planar magnetic, or the higher end of Sennheiser line. I'm guessing Beyers wouldn't fare much better, but I don't have any of them to test it out with. It is quite good for lower impedance cans though. It's much quieter than the Butte though. The background is nice and dark. It uses a more gain stage->unity gain buffer design rather than the single unit gain/power amplifier on the Butte.
The Butte seems prone to picking up interference. I get random bouts of static on some positions of the volume pot. I think it would fare better with a better pot, but the PCB isn't necessarily laid out to accommodate one. I also think it would do better with the input neutrals chassis grounded (like the O2).
Sep 20, 2017
flyfisher55
30
Sep 22, 2017
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Really thinking about building the O2 but was afraid it would be too much like the Butte. Thanks for your input. i received all the parts and stayed up last night. The Butte is built! Sounds good with 400i, foster X00, HD 600 and the beyer 880. My Grados sound distorted. Más you said the volume pot has bad spots and you need to play with it to get past the distorted sound. It seems to only be an issue with the Grado phones
Sep 22, 2017
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