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Old 13th March 2011, 12:08 PM   #401
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470Ω is very much!
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Old 13th March 2011, 05:31 PM   #402
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hi apex sir

can u share the hv25 (5 pair out) pcb layout top and bottom in pdf .
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Old 14th March 2011, 10:54 PM   #403
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Quote:
Originally Posted by nazirdigi View Post
hi apex sir

can u share the hv25 (5 pair out) pcb layout top and bottom in pdf .
I can't find this files, I suggest HV23 with +/-75V rail and 4 pairs of IRFPs is OK.
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Old 19th March 2011, 11:30 PM   #404
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Do i have to match the mosfets? I know theres a lot of discussions on this matter... and yes I googled it. some people would say its a must some people say otherwise. but i want the opinion of apexaudio. Whats your take on this Mile?

cheers
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Old 22nd March 2011, 11:01 PM   #405
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Originally Posted by jalou1995 View Post
Do i have to match the mosfets? I know theres a lot of discussions on this matter... and yes I googled it. some people would say its a must some people say otherwise. but i want the opinion of apexaudio. Whats your take on this Mile?

cheers
It's better to match the mosfets, but amp will work with unmatched mosfets also.
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Old 30th March 2011, 11:30 AM   #406
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hello,
i am interested in this amplifier. I want to ask about the protection output. When the speaker output is shorted what is the state of the pro output? i would like to connect this output to a microproccesor that's why i asking.
If i'll use only 3 pairs of IRF's what supply will i need and what will be the power in 8ohm speakers?
thank you
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Old 30th March 2011, 12:05 PM   #407
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[QUOTE=korabetsni;2521479]hello,
i am interested in this amplifier. I want to ask about the protection output. When the speaker output is shorted what is the state of the pro output? i would like to connect this output to a microproccesor that's why i asking.
If i'll use only 3 pairs of IRF's what supply will i need and what will be the power in 8ohm speakers?
And a last question: what is the difference between HV23 and HV350. I know that the HV350 has different bias circuit but why did you redesign this? the HV350 is better in something?
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Old 21st April 2011, 03:53 PM   #408
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Quote:
Originally Posted by korabetsni View Post
hello,
i am interested in this amplifier. I want to ask about the protection output. When the speaker output is shorted what is the state of the pro output? i would like to connect this output to a microproccesor that's why i asking.
If i'll use only 3 pairs of IRF's what supply will i need and what will be the power in 8ohm speakers?
thank you
State of PRO out is +HV if overload protect is active...
Regards
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Old 21st April 2011, 05:33 PM   #409
Djera is offline Djera  Montenegro
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how much power is this amp with power supply AC 55 0 55 600watt?

Thanks!
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Old 21st April 2011, 08:08 PM   #410
AndrewT is offline AndrewT  Scotland
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600W into 8r0 requires an output voltage of 98Vpk.
Add on an allowance for losses through the amplifier, say 15V. You need supply rails of ~+-113Vdc and a mighty strong and expensive PSU to hit a 600W target.
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