Any warnings about paralleling chips?

[leadbelly]

Originally posted by lawbadman
Someone correct me if I am wrong.
But if I understand what you guys are saying, that means that paralleling two chips gives no increase in power output.
So why bother parallel if the only advantage is sharing the load between the two chips?

No increase in power driving an 8 ohm speaker if everything else remains same...but not all speakers are 8 ohms

And if you change other things, like rail voltage, then you will get more power into 8 ohms.

[peranders]

Originally posted by lawbadman
Someone correct me if I am wrong.
But if I understand what you guys are saying, that means that paralleling two chips gives no increase in power output.
So why bother parallel if the only advantage is sharing the load between the two chips?

Yes, why?

1 If you have +- 42 volts and have a 4 ohms speaker? Can a single LM3886 handle this?

2 If you have less than +- 42 volts and have a 2 ohms speaker load. Can a single LM3386 handle this?

[lawbadman]

peranders,
Just yesterday I made a chip amp paralleling 2 LM3886. I was wondering if just using one chip will give me the same power as two.
My speakers (MMGs) are 4 ohms and my power supply is +-40 Vdc.

In my case two chips should give me more power right?

[peranders]

You will have more power only if:

1 The cooling of one LM3886 isn't efficient enough

2 The current is too much for one LM3886

When we talk about power, don't forget that it's about dB's. Loosing 30% power means only -3 dB!