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Re: Something else you might try . . . .

Take a look at the coupling capacitor values in other equipment if you can, especially tube gear. Look at the caps that go between tube stages in an amplifier, or the output of a DAC or preamp. Most coupling caps are usually around the 0.22 to 0.47uF range. That's it. There's a good reason for that too. It's usually enough capacitance. And what about transformers? Transformers don't go down into the 5HZ world. Yet you have trannies coupling the power to your speakers. So do I. I wouldn't worry about it.

I think the only reason a manufacturer would use a 4.0uF cap is to guarantee ultra low bass performance into a VERY low impedance power amp. Probably a pro-audio situation or a powered speaker. You are miles away from that with your VAC.

Even then, do you really need to amplify 5Hz? 15Hz?? Not really. You're probably better off rolling the lows off somewhere in the 20Hz region anyway. Your goal is to hear music and not subteranian artifacts. Your amp and speakers will be happier that way too.

Just remember to get the correct VOLTAGE value when you replace a capacitor. You can use a higher voltage rated replacement cap, but never lower.

You can also experiment with an inexpensive cap first just to see if the bass suddenly disapears.

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