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PostPosted: December 30th, 2021, 12:49 pm 
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Location: Parkville, Maryland
I kind of didn't pay this thread much mind until I got curious and looked at the schematic. YIKES!

Bob is calling for a stasis bias of 25-ma. My experience has been that biasing KT-88s below 36-ma results in a hard-edgy sound and biasing above results in a "dark" smothered sound. So I would guess that to meet his warranty expectations he "low balls" the bias to make the tubes last longer then "band-aids" the crap out of his design in an attempt to get rid of the nasties created by the low bias. Zobel networks -- complicated heavy feedback -- and filter networks between stages and the cathode of the first stage. This was a disappointing experience -- I would have thought Bob Carver knew better. :o

I have yet to see any DIY'er on this blog make bone-head decisions like that. WOW!! Buyers Beware!

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PostPosted: December 30th, 2021, 1:03 pm 
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A couple of years back, there was a DC HiFi group meeting at Greg Viggiano's place and they had a Carver tube amp there which if my memory serves me was the 275. I also brought the Cherry Bomb which is 15 watts at 8 ohms. When we replaced the Carver with the Cherry Bomb, everyone was amazed at the better quality sound from the Cherry Bomb. They also thought the Cherry Bomb was more dynamic which surprised me. Now I know why.

Tom


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PostPosted: December 30th, 2021, 1:25 pm 
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tomp wrote:
A couple of years back, there was a DC HiFi group meeting at Greg Viggiano's place and they had a Carver tube amp there which if my memory serves me was the 275. I also brought the Cherry Bomb which is 15 watts at 8 ohms. When we replaced the Carver with the Cherry Bomb, everyone was amazed at the better quality sound from the Cherry Bomb. They also thought the Cherry Bomb was more dynamic which surprised me. Now I know why.

Tom

Having first-hand experience with Tom's Cherry Bomb in my system -- Tom's shoot-out description is no idle bragging. The Cherry Bomb is one of a kind. :thumbup:

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PostPosted: January 17th, 2022, 10:47 am 
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Looks like Amir got his basement cleaned up after the flooding and finally measured the amplifier.

https://www.audiosciencereview.com/foru ... amp.29971/


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PostPosted: January 17th, 2022, 11:43 am 
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This will give fodder for the next two decades to every measurement happy "Objectivist" audiophile to claim that tube amps suck, measure poorly and are a rip-off. :clap:


Hopefully that will reduce demand and lower costs. I am sick of spending $60 for a 6SN7.


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PostPosted: January 17th, 2022, 2:08 pm 
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Not quite true. The take away from this should be that all poorly designed or cpnstructed amps whether tube or solid state suck. Want to measure and hear an exemplary tube amp? Audition one of David Berning's.


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PostPosted: January 22nd, 2022, 11:40 am 
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This is the screen cap of ASR Carver Crimson review. What are the Cap and resistor across the speaker terminal for?

Attachment:
delme1.jpg
delme1.jpg [ 55.93 KiB | Viewed 1005 times ]


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PostPosted: January 22nd, 2022, 11:48 am 
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Location: Baltimore MD
is it not what they call a zobal .


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PostPosted: January 22nd, 2022, 11:53 am 
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Pelliott321 wrote:
is it not what they call a zobal .

:clap:

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PostPosted: January 22nd, 2022, 11:56 am 
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Its just a filter. Some speaker manufacturers claim big black magic here.


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