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Old 10th May 2013, 09:44 PM   #361
PMI is offline PMI  United States
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Quote:
Originally Posted by Lazy Cat View Post
Still mono?
No, my left ear needed a rest. All happy now, playing in stereo. One heat sink had to be "re-purposed", but I like reusing what I have. Just need a decent DAC in my test area now... Looking forward to receiving that set in racing green from you!

Oh, and Thank You (and Shaan!)
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Last edited by PMI; 10th May 2013 at 10:00 PM.
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Old 10th May 2013, 10:51 PM   #362
shaan is offline shaan  India
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Thnx 4 da !

They look ultra pro with those FETs on giant heatsinks!

shaan

Last edited by shaan; 10th May 2013 at 11:01 PM. Reason: heat-ink... rofl
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Old 10th May 2013, 11:17 PM   #363
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Default Stereo set playing beautifully!

@PMI - Very nice looking PeeCeeBees you have there!

I finally got both of mine hooked up and playing in stereo. Short subjective review below, but let me say such a simple circuit positively blew my mind .

The soundstage immediately blew me away. The little amp really showed what the sound engineer had in mind with respect to creating the illusion of 'being there'. I've heard lots of consumer audio, plus some amps considered to be somewhat up-scale, but never has the music sounded so open.

Treble sounds very detailed yet smooth, no harshness that comes with some amps. This surprises me given the speed and wide bandwidth this little gem is capable of. I'm sure if the speaker could reproduce the note it could faithfully reproduce sounds only my dog and cats could appreciate.

Vocals are almost ethereal. Detail, detail, and more detail. Going to force me to go back through my collection to find all my favourite vocalists and re-listen.

I initially thought bass might have sounded thin but then it struck me that no, it plays plenty low and with authority, but rather there is so much clarity that it wasn't in any way muddied up. You could really hear what the bassist or percussionist was really doing, not masked into something that was smeared and sounding bigger than it was.

Overall, this thing is a true jewel. All those looking to build a simple, low parts count amplifier that given a little care in parts selection will simply 'just work' really needs to look at the VSSA in any form.

Get off the fence! Warm up that soldering iron and build yourself one!
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Last edited by jkuetemann; 10th May 2013 at 11:21 PM. Reason: Added pic
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Old 10th May 2013, 11:28 PM   #364
PMI is offline PMI  United States
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Quote:
Originally Posted by shaan View Post
Thnx 4 da !

They look ultra pro with those FETs on giant heatsinks!

shaan
As usual, U R 2 kind. The heat sink is rated for 0.65C/W, so just a bit smaller than what LC recommends for his boards, but should be about right for +/-35~37V rails worst-case power dissipation. In normal volume listening, 8-ohm load, heat sink temperature is about 10-12 deg. C above room temp (measured about one inch from mounting screw for the mosfet. In other words, just slightly warm to the touch.

Next test will be with the simplest power supply I can think of to use here, transformer, rectifier, one pair of 4700 uF per rail.
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Old 10th May 2013, 11:34 PM   #365
PMI is offline PMI  United States
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Originally Posted by jkuetemann View Post
Vocals are almost ethereal. Detail, detail, and more detail. Going to force me to go back through my collection to find all my favourite vocalists and re-listen.
Agreed, especially this part. (was just listening to Diana Krall as I was reading your post) Really brings some difficult to hear passages to life.
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Old 10th May 2013, 11:34 PM   #366
shaan is offline shaan  India
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Thanks for the review Jason. Another happy diy-er, thanks to GABOR and LC for the idea and research.

Visitors, you get the story clear, don't you? Who's next to try, his very own, PeeCeeBee?
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Old 10th May 2013, 11:48 PM   #367
shaan is offline shaan  India
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Quote:
Originally Posted by PMI View Post
Agreed, especially this part. (was just listening to Diana Krall as I was reading your post) Really brings some difficult to hear passages to life.


I have some jazz instrumental and vocal tracks in mp3 320kbps. My previous amps awfully roll on the floor when any of these files are in the playlist.

But, now-a-days the flowers are in full bloom with all of their colors and textures.

Since the SSA in 2012 March...

Last edited by shaan; 10th May 2013 at 11:50 PM.
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Old 10th May 2013, 11:50 PM   #368
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Originally Posted by jkuetemann View Post
A completed module. Just need to prepare the other heat sink adapter and heat sink for permanent assembly.
Which schematic was used?

Regards zeoN_Rider
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Old 10th May 2013, 11:57 PM   #369
shaan is offline shaan  India
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Hi zeoN.

Welcome to the thread.

See the first post. You have your schematic.
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Old 11th May 2013, 12:14 AM   #370
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Hi zeoN.

See the first post. You have your schematic.
Are you sure?

Regards zeoN_Rider
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