This design is very good for HI-FI, but there was some limitation for PA use.
http://www.diyaudio.com/forums/solid-state/163159-150w-mosfet-amplifier-irfp250x2.html
Regards
how about adding another 2 or 3 pairs?
will it's limitation improve?regarding PA use
no problem of adding fets
that's what i've got in stock
Adding output transistors, and using higer power voltage will not give higer output power, that is limitation for PA use.
Yes I use this amplifier in bridge, but only with 8R load. For 4R load use PSU with +/-50V in bridge mode.
Regards
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When i say "PA", i say "music amplification" (RS) and not "Public adress" We talked well in Brazil...
You understand me Apex ?
Thanks all !
You understand me Apex ?
Thanks all !
When I say "PA", I say "Professional Amplification" or "Professional Audio" and not "Home Amplification" or "Domestic Audio" We talked well in Serbia 🙂
You understand me Valenca ?
Regards
U can find circuits and pcbs in my threads,
900W H-class PA Amp with Limiter and 500w PA amplifier with Limiter
http://www.diyaudio.com/forums/search.php?searchid=963131
Regards
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PSU for MOSFET Amplifier
This PSU was used in time when I building this mosfet amplifier. There is PSU, DC and overload cut-out protect for each channel and soft-start for toroidal transformer. This circuit can be used with any amplifier.
Attachments
PA Protect can be used with Hi-Fi amps also. For silent operation 47R/5W do not stafed, and fan do not work on low speed, when heatsink temperature is over 60deg it will turn on to high speed, and even without fan when heatsink is over 90deg protect will cut-out speakers anyway.
Attachments
Short circuit protect cut-out speakers, and not turn on again until amplifier was turn off, and turn on again (power on reset). DC protect turn on speakers when DC gone, and thermal protect turn speakers again when amp get cold.