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Old 25th October 2008, 05:43 PM   #1
diyAudio Member
Join Date: Oct 2008
Default Tweak 1 MHz LCaudio modules

I'm interested by LCaudio class D modules. ZAPpulse 2.3 like me to start well. In browsing forums, I saw that somebody have fixed up the cutting frequency of version 2.2 to 1 MHz and according to their statements, the results are very good in the medium and upper spectrum. But, there is very little information allowing me to do the same thing for a 2.3. Some of you have done this kind of manipulations with success?
If yes, can you tell me how you did it?
Otherwise, other manufacturers of modules that work at these frequencies does exist ?
Someone knows what are the names of fet drivers used by LCaudio ?
For now, I have only found Intersil and IRF manufacturing drivers can work on these frequencies.
Thank you, in advance, for your answers.

Best regards.
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Old 29th October 2008, 04:46 PM   #2
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Join Date: Oct 2008
Default mosfet drivers and pwm frequency

nobody knows what kind of mosfet drivers are used in the ZAPpulse 2.2 and 2.3 modules ?

Someone has already implemented a class D amplifier operating at a pwm frequency of 800 kHz, for example?

My goal is to build, in the beginning, a single channel, and test sound quality in the mid-treble, by varying the frequency of pwm between 500 kHz and 800 kHz.

Thank you.
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Old 29th October 2008, 04:51 PM   #3
BWRX is offline BWRX  United States
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Have you tried contacting the manufacturer about this?
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Old 30th October 2008, 06:31 PM   #4
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I contacted LCaudio several times but they remain "silent". If someone has these modules, I wish speak with him.
Thank you
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Old 1st November 2008, 05:01 AM   #5
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it's the tweak we can see in the attached file.

Attached Images
File Type: jpg zappulse.jpg (31.7 KB, 140 views)
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