Interested in Modifying the C4000

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jvandyke_texas
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Interested in Modifying the C4000

Post by jvandyke_texas » Mon Jun 13, 2005 11:07 pm

Are there other electrical engineers out there who are interested in modifying their C4000 for top performance?

I recently bought an ebay C4000, and the correlator and peak unlimiter didn't sound like my Phase Linear 4000 that I've used for 25 years. I've been going through the C4000, and C4000t schematics and looking at signals under the scope.

So far I've found the clipping in the summing amp and log amp that's causing the correlator to swish on noisy programs. Found a PCB layout error in the correlator right channel that limits its performance.

There's also redesign potential in the correlator, peak unlimiter, time delay, and maybe sonic hologram generator.

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Re: Interested in Modifying the C4000

Post by TNRabbit » Wed Mar 02, 2011 3:42 pm

I'm making it my personal mission to revive all 20 pages of unanswered threads~ :-"
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jvandyke_texas
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Re: Interested in Modifying the C4000

Post by jvandyke_texas » Wed Mar 02, 2011 8:11 pm

Gee, 2005.
I already redesigned that preamp (and BillD's) completely.
Carver listened to it and wanted me to do his.
Too busy.
Project over.
Phase Linear 4000 Series I,II, 700B Series I,II, Carver C-4000 champagne, black, C-4000t, TX-11a, AR-XB, Pioneer PL-512, Speakerlab K

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BillD
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Re: Interested in Modifying the C4000

Post by BillD » Wed Mar 02, 2011 8:15 pm

Nice to see you're still lurking.
It should sound like it isn't there!
There is a difference between hearing and listening...
Making life enjoyable through expensive electronics.
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Scarabeo
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Re: Interested in Modifying the C4000

Post by Scarabeo » Wed Mar 02, 2011 8:32 pm

jvandyke_texas wrote:Gee, 2005.
I already redesigned that preamp (and BillD's) completely.
Carver listened to it and wanted me to do his.
Too busy.
Project over.
Yep, Good to see your still out there! =D>
BillD, You will be forever with us! RIP until we meet again on the other side...

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treitz3
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Re: Interested in Modifying the C4000

Post by treitz3 » Wed Mar 02, 2011 10:13 pm

No doubt. We haven't heard a peep in a while from you. Hope all is well.

Don't mind the Rabbit. He's obviously bored and can't remember that Bob and the folks at CF had actually listened to your upgraded, modified C-4000. Either that or he's getting all senile on us. :-s
In search of accurate reproduction of music. Real sound is my reference and while perfection may not be attainable? If I chase it, I might just catch excellence.

The best way to enjoy digital music reproduction is to never listen to a good analogue reproduction.

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Re: Interested in Modifying the C4000

Post by TNRabbit » Thu Mar 03, 2011 5:05 am

treitz3 wrote:No doubt. We haven't heard a peep in a while from you. Hope all is well.

Don't mind the Rabbit. He's obviously bored and can't remember that Bob and the folks at CF had actually listened to your upgraded, modified C-4000. Either that or he's getting all senile on us. :-s
...or tweaking everyone's collective nose...having fun!
TNRabbit
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From FrankieD's lips to your ears: Sunfire - a quiet box of endless power.

Sunfire TG-IV/400~7 Amp
Carver SD/A-360 CDP
Benchmark DAC-1
Sony SACD/DVD-A
Active bi-amp: Ashly XR-1001 & 2 Rane PEQ-15s
Main: HotRodded AL-IIIs
Sub: Klipsch RT-12d
Center: Sunfire CRS-3c
Surround: Sunfire CRS-3 (x 2)

OconeeOrange wrote:"Gary likes to play it 'loud' as do I. His system begs you turn it up until you die"

RIP WIlliam B. Dibble, 1948-2012. I'll miss you my friend.

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engtaz
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Re: Interested in Modifying the C4000

Post by engtaz » Thu Mar 03, 2011 4:27 pm

Great to hear from you James. Hope all is well with you.

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Roy
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