Quote:
Originally Posted by Maxvla /img/forum/go_quote.gif
Forgive my ignorance. Merely trying to follow your debate with limited knowledge.
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Nothing to forgive. I just wanted to make sure I understood just what it was you were asking so I could give an appropriate answer.
Quote:
| It seemed like you were saying a bridged amplifier only sends one polarity to the headphones. |
Yes, that's what I am saying.
A headphone driver has just two terminals. There can be only one polarity.
Similarly, a bridged amplifier drives the headphone from just two terminals. There can be only one polarity.
Sure, if you use the amplifier's ground as a reference and you look separately at each output terminal, yeah, you'll see a signal of one polarity at one terminal and a signal of the opposite polarity at the other terminal. But that's meaningless. The amplifier's ground isn't included in the output. The output is only across the two terminals the drive the headphone driver. And with only two terminals, there can be only one polarity.
For that matter, you could take two resistors of the same value, tie them together in series, and wire them across the output of a single ended amplifier and if you use the point between the resistors as a reference and look separately at each output terminal, you'll see a signal of one polarity at one terminal and a signal of the opposite polarity at the other terminal.
But just as with the bridged amp, it's meaningless. As far as signal voltage and polarity goes, a headphone doesn't know whether it's being driven by a single ended amplifier or a bridged amplifier.
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