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Old 3rd January 2008, 09:03 PM   #561
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Behemoth knobs! Do they have good torque?
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Old 5th January 2008, 03:29 AM   #562
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nice!
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Old 5th January 2008, 03:45 AM   #563
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Default Re: Update on LM4780 Amp

Quote:
Originally posted by okapi
If anyone has any suggestions as to how i can tweak my lm4780's i would greatly appreciate it.
You mentioned you run the LM4780 chips in parallel. How about separating them and run each half separately? That would mean only one half of the chip would be used in each amp, the other half disconnected. I'm curious myself how much putting amp channels in parallel affect sound.

Here's the link how to use them in a single chip mode: http://www.diyaudio.com/forums/showt...565#post636565
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Old 6th January 2008, 04:51 PM   #564
okapi is offline okapi  United States
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Hi peter,

the amps in question are in a relatively completed state that makes me reluctant to go back in and switch them from parallel to stereo.

however, the power supplies are more accessible and i have had some improvements (much better low end) in another amp by increasing my power supply capacitance (tried adding 1500 and 10 000 microF on each rail with a 4.7 microF bypass cap just after the bridge). So i plan to do the same with my LM4780 power supplies.

If that does not work i will try your suggestion. I'll probably experiment with a zobel at the same time as i think my main AC supply may not be the best ( my stereo sounds much better late and night, particularly on weekends).

Tim
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Old 11th January 2008, 06:02 PM   #565
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Just finished my first proper integrated chip amp.
Thanks to Peter at AudioSector and Michael at DIY Enclosures LLC..
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Old 1st February 2008, 06:26 AM   #566
montag is offline montag  New Zealand
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Hi all just joined like what i have seen in this fourm thought i would share my little amp. Hope this is in the right place ?
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Old 10th February 2008, 09:59 PM   #567
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Quote:
Originally posted by montag
Hi all just joined like what i have seen in this fourm thought i would share my little amp. Hope this is in the right place ?

hello can you post the PCB and the layout?
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Old 12th February 2008, 06:02 PM   #568
Igla is offline Igla  Slovenia
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Hi !
My recent LM1875 gainclone.
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Old 12th February 2008, 06:47 PM   #569
luka is offline luka  Slovenia
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Hi

Hehe nice copper block, where did you get it?
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Old 12th February 2008, 07:15 PM   #570
Igla is offline Igla  Slovenia
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From where I work.
I must say that copper gives the final touch to the sound of GC.
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