I need advise for three channel Parallel LM4780 project.

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Hi all,

I'm building two, three chanells amplifiers based on parallel LM4780 chips for my three way speakers.

Just completed the amplifier and power supply boards, I choose high capacitance (10000uF) for the bass amplifiers and low capacitance (1000uF) for the mid and tremble amplifiers. Each amplifier module has its own Power supply PCB.

I still need enclosures and power transormers.
Sound wise, is there any good reason not to use a single transformer (24v+24v secondaries @ 1000VA) to supply all three PS modules and amplifiers?

Is it better to use different secondaries (i.e. 24v+24v+24v+24v+24v+24v @ 1000VA) for each module and even better to use different transformers?

Regards
P
 
Padel said:
Is it better to use different secondaries (i.e. 24v+24v+24v+24v+24v+24v @ 1000VA) for each module and even better to use different transformers?

Different secondaries is better.
Even better is separate transformer for each drive unit/amp/channel.
That would give you two trafos (one per channer) with 6 24V secondaries each, or (even better) 6 trafos with 2x24V each.
As you already have independent PSUs for each amp, it's just a question of trafos.
And that depend$ on how much you wanna $pend.

:cool:
 
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