Multi Cap Draw backs

[Krisfr]

What are the drawbacks and advantages of using 50 1000 uf caps instead of 2 25,000 ones om a linear or SMPS design? Besides the cost savings.

[ostripper]

Lower ESR for one thing. I like at least 4 10K uF per rail with a low value resistor (.1R 10w) in between the 4. (2 caps - R - 2caps)
OS

[Ian Finch]

Likewise with ripple current rating: You get around 5 times the rating with 10 x 1,000 uF compared to 1 x 10,000 uF. using average parts. OTOH the PCB real estate to park 50 caps is considerable. You could clamp mount a few decent 20,000 uF electros (which utilise vertical space too) for the cost of the clamps and no PCB.

Laying out your power rails around more of the area of your amp doesn't do much for keeping EMI down with AB and digital designs either. Still, some seem to prefer the architectural look of all those babies - whatever the technical issues.

See what electros Apex Jr. has in the commercial forum. The cost benefit might well favour the big caps, all things considered.

[CBS240]

Less inductance so lower HF Z, hence lower ESR. A cap like that is two plates separated by a dielectric, rolled up into a coil, i e an inductor. A bigger coil has larger inductance than multiple small ones in parallel. But it does cost more PCB space. There is no such thing as a free lunch. Bypassing with a film cap is good strategy.

[megajocke]

Not really. The connection between foil and leadout wires is typically made in such a way that the rolled foil doesn't create an inductor.