Op Amp stacking... Again...

[Krinor]

Hi,

I've just been digging through older threads for information on stacking.
I'm about to fall asleep now so I'll just drop a little question here before I'm off to bed:

Is it, or is it not advisable to stack an LM386 as used in a Ruby ?

Please: someone answer yes or no.  And if the answer is yes - maybe someone else would like to elaborate further.

What is it with this op amp stacking anyway ? Peoples opinions seem to vary greatly here...

*yawn*

[ambulancevoice]

hmmm, i think it would be possible to stack a lm386, since opamp stacking is merely connecting every pin to each other except the ins/outs which are connected to switches for switching each ic out, i dont see why it shouldn't work really, maybe it would be kinda like bridging???

[Krinor]

Bridgeing yes. That was the idea, only stacking is so much quicker... Well I guess I'll just try it anyway and see what happens.

[brett]

Hi
don't forget that each 386 is "seeing" less than the normal load. So don't parallel more than 2.
Unfortunately, 386s put out a lot less power as the load falls (I think it's about half a watt at 8 ohms, one third at 4 ohms) so the gains will be slim.
For more volume, go for more supply voltage and a heatsink.
cheers

[Krinor]

Right. I was affraid of that.
More power it is then.