DIY Sony VFET Builders thread

A gift that keeps giving

The 3D presentation of my amp continues to develop and improve. Especially front to back. I was listening to a familiar recording this morning and it sounded different than what I was used to. I think this was the first time I’ve heard the instruments brought forward into my listening space like that.
Really amazing
 
The 3D presentation of my amp continues to develop and improve. Especially front to back. I was listening to a familiar recording this morning and it sounded different than what I was used to. I think this was the first time I’ve heard the instruments brought forward into my listening space like that.
Really amazing

I love to read all the reports people are sharing about their listening experiences, please keep them coming.

How many hours have your amp got so far? Do you think it improves even more after a while?

I know people talk about 'burn in' and it makes sense for me with speakers and other mechanical devices. With amps and electronics I am less sure. Any thoughts?
 
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I have burned mine in for four days now (amp driven with source at medium volume but speakers disconnected to exercise the electronics) and I think it sounds better. Smoother is what I would say and top end resolution also improves. I think amps with electrolytic output coupled caps benefit more from this. There is a basic 0.33uF Wima box film cap on the input stage. This amp has a very nice smooth presentation that is relaxed yet is able to deliver some nice punchy bass to some 5.25in 8ohm woofers.
 
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Well, I have two systems but neither is really "proper" for this VFET I will admit. A small bedroom nearfield setup where the BA2018 currently is, and an acoustically treated living room home theater with mid-fi electronics (Marantz AVR, etc.). The VFET amp is currently in this theater setup driving some SVS Ultra bookshelves with upgraded crossovers. Everything above 80hz to those and a Rythmik sealed servo sub handling the bottom end. Not a proper load but had to try it. On my bedroom system the digital volume control on my DAC was usually at 1 or 2 o'clock with BA2018 linestage in front of this new amp. (Balanced input and no analog volume control on the pre). Nice mix of Colburn accuracy and Pass musicality with that combination..
 
music soothes the savage beast
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I have burned mine in for four days now (amp driven with source at medium volume but speakers disconnected to exercise the electronics) and I think it sounds better. Smoother is what I would say and top end resolution also improves. I think amps with electrolytic output coupled caps benefit more from this. There is a basic 0.33uF Wima box film cap on the input stage. This amp has a very nice smooth presentation that is relaxed yet is able to deliver some nice punchy bass to some 5.25in 8ohm woofers.

Yeah, but will it drive F4?

:)
 
music soothes the savage beast
Joined 2004
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I am reading all the comments on the sonics and thinkng, there are people out there who think all amps sound the same.

dave

I spent weekend with friends doing bbq and comparing Aleph J, F1J, and Vfet. Yes, we drink a lots of beer, but consensus was clear, each amp sounds different.
How different, you have to hear for yourself.
 
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Thanks for the description, william2001. Nothing is ever simple, is it?

I really love the simplicity and clear sound of the Toshiba C15 preamp I have been using for a long while. However with the VFET I think I could use just a little more gain, especially for vinyl playback.

I know I could change to more efficient speakers, but my current set are just right for the space, which is now home office, living room, and listening room all in one.

In theory, could the BA18 linestage help with a little more gain between my preamp and the VFET, or is that ill-advised?
 
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music soothes the savage beast
Joined 2004
Paid Member
Thanks for the description, william2001. Nothing is ever simple, is it?

I really love the simplicity and clear sound of the Toshiba C15 preamp I have been using for a long while. However with the VFET I think I could use just a little more gain, especially for vinyl playback.

I know I could change to more efficient speakers, but my current set are just right for the space, which is now home office, living room, and listening room all in one.

In theory, could the BA18 linestage help with a little more gain between my preamp and the VFET, or is that ill-advised?

I use ACP+ right now, its amazing.