Hi claudio52. Wise indeed. I wonder how Mr. Pass solved a potential problem of idle current increasing with time?
Hello. Thanks for the pics. There is one long snow-white hair laying next to the blue trimmer pot of the left channel!Naked DEFiSIT
It's take few days to edit video content from BAF2017.
Little pattience this be available very soon
Do You see this Mr Pass documentation gift to DiyAudio Community :
http://www.diyaudio.com/forums/pass...ve-contents-2017-burning-amp.html#post5242779
The Two B1's
B1 Transformer: Adding a transformer allows 0, 6, or 12db gain. (6db is the sweet spot.)
B1 Korg: Adding the Korg NuTube triode adds up to 7% of pure negative phase 2nd harmonic and 19 db of gain (more than Nelson would like, but it's the sweet spot so what are ya gonna do?).
Boards should be available from the DIY store, maybe in a kit with the transformer or NuTube.
-Tom-
B1 Transformer: Adding a transformer allows 0, 6, or 12db gain. (6db is the sweet spot.)
B1 Korg: Adding the Korg NuTube triode adds up to 7% of pure negative phase 2nd harmonic and 19 db of gain (more than Nelson would like, but it's the sweet spot so what are ya gonna do?).
Boards should be available from the DIY store, maybe in a kit with the transformer or NuTube.
-Tom-
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The Two DEF Amps
The DEF amp delivers 50 watts per channel with stellar distortion numbers. Matching the depletion mode part and the (?other kind of part?) is pretty fiddly, so only suitable for the DIY crowd, whose time is free and likes fiddly stuff.
The DEFiSIT amp uses the Pass SIT-1 parts. It is tuned to provide a moderate amount of that negative phase 2nd harmonic that many people like.
And of yes, both use transformers, which seems to be the theme of the show this year.
Looks like the DEF amp is headed to the DIY audio store.
The DEF amp delivers 50 watts per channel with stellar distortion numbers. Matching the depletion mode part and the (?other kind of part?) is pretty fiddly, so only suitable for the DIY crowd, whose time is free and likes fiddly stuff.
The DEFiSIT amp uses the Pass SIT-1 parts. It is tuned to provide a moderate amount of that negative phase 2nd harmonic that many people like.
And of yes, both use transformers, which seems to be the theme of the show this year.
Looks like the DEF amp is headed to the DIY audio store.
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The Two LX Mini Crossovers
Nelson designed two crossovers for Siegfried Linkwitz's LX Mini loudspeakers, which are normally handled with bi-amping and DSP.
One is a two-way, and the other adds a sub as well. Not much I can say other than the boards are works of art, with a matrix of repeated modules.
These apparently will also be released to the DIY community.
Nelson designed two crossovers for Siegfried Linkwitz's LX Mini loudspeakers, which are normally handled with bi-amping and DSP.
One is a two-way, and the other adds a sub as well. Not much I can say other than the boards are works of art, with a matrix of repeated modules.
These apparently will also be released to the DIY community.
It's take few days to edit video content from BAF2017.
Little pattience this be available very soon
Do You see this Mr Pass documentation gift to DiyAudio Community :
http://www.diyaudio.com/forums/pass...ve-contents-2017-burning-amp.html#post5242779
Thanks Soundhappy, didn't read that... greedy boy
no patience...yes, I did download it, very nice.
I understood these can be used for the SAL open baffle project also? Did Nelson mention that too?
Thank You very much AMB for the photos gallery
Burning Amp Festival 2017
Burning Amp Festival 2017
Attachments
Had a great time at BAF 2017
I had a great time at BAF 2017. It seemed very well organized. Talking to other diyer's is always great. The presentations were very interesting. I enjoyed the audio test equipment history lesson. Nelson's presentation was a lot fun and very informative. It's great to see that he really seems to enjoy building audio equipment. Looking forward to next year.
I had a great time at BAF 2017. It seemed very well organized. Talking to other diyer's is always great. The presentations were very interesting. I enjoyed the audio test equipment history lesson. Nelson's presentation was a lot fun and very informative. It's great to see that he really seems to enjoy building audio equipment. Looking forward to next year.
Pass Headphone Amp, Sony VFET Amp
Someone who was there for the whole of Wayne Colburn's presentation should say something about the headphone amp. Two or three of them with different active devices were available to audition in the Pass room. Boards should be available in the DIY Audio Store soon.
Did I hear that this could double as a pre-amp as well?
One more item from Nelson Pass's presentation. There will be another round of devices for the Sony VFET amp available through the DIY Audio store. They had kept a large number back as spare parts, but since no-one has been able to break one a large portion of the "spare" parts will be released.
Someone who was there for the whole of Wayne Colburn's presentation should say something about the headphone amp. Two or three of them with different active devices were available to audition in the Pass room. Boards should be available in the DIY Audio Store soon.
Did I hear that this could double as a pre-amp as well?
One more item from Nelson Pass's presentation. There will be another round of devices for the Sony VFET amp available through the DIY Audio store. They had kept a large number back as spare parts, but since no-one has been able to break one a large portion of the "spare" parts will be released.
now counting K170 spares for that Korg B1 (darn, only two left...).Papa is killing me!! Each time I have "a plan" to wrap up this hobby as my systems are getting already so good, he pulls another one from his hat and off we go after the holly grail again. and this year offerings are just incredible
I already decided to try ACA 2 since tube-like sound quality was implied before, but the specs in BAF slide look a bit different than these:?
http://www.diyaudio.com/forums/pass-labs/310169-m2-story-3.html#post5155039
p.s. Papa if you are already planning ahead for 2018: I already ordered J74/K170 input pairs for that tbd amp for my spare K1530/J201s; (that could be a good project btw as those are still available matched from Spencer plus a lot of them people bought before from NicMac and I imagine a few are still around..). just thinking out loud..
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I would like to thank everyone at this event. Everyone was very pleasant and information was abound. I especially like to thank Mark for auditioning different amp, including my own.
My amp was very underpowered, barely drove the speakers with any vokume, but it is a SET amp 6L6...its no powerhouse by any means. I will be going next year and go for volunteer and a full stay. Thanks again everyone!
My amp was very underpowered, barely drove the speakers with any vokume, but it is a SET amp 6L6...its no powerhouse by any means. I will be going next year and go for volunteer and a full stay. Thanks again everyone!
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