I am wondering if BTL amps can exert better control over drivers, especially the subwoofer ones. TIA for any help.
better control that “non-BTL” amps, e.g. “ single ended”. In lay terms would the voltage
swings acting from both sides offer a push-pull action that can both accelerate and brake
the coil to exert control.
swings acting from both sides offer a push-pull action that can both accelerate and brake
the coil to exert control.
I'd argue it'll be worse - you've got half the damping factor since there are effectively two amplifiers in series.
Chris
Chris
Most A/B/AB amps have a damping factor / output impedance better than the speaker cables, so it won't make much difference if any.
Such amps normally have an output impedance low enough for driver control even if the impedance is doubled in a BTL config with short cables (as in active speaker).
Class D without feedback can have quite a large output impedance at high frequencies, but that's not relevant to subwoofers where the filter impedance will be very low.
My practical dillemma: I can choose between two d-class amp modules for my subs (no dsp). One is full bridged the other “single ended” output, regardless what input they get.
Their output impedances are in single digit miliohms at 1 kHz. All other things being equal, which one will provide better control for the sub driver?
Their output impedances are in single digit miliohms at 1 kHz. All other things being equal, which one will provide better control for the sub driver?
I suppose your »control« can be translated to »damping factor«. As said above, BTL means two amps in series. Hence the DF is doubled.
Btw, the output's ground terminal doesn't need any »control«, as it is the reference point. Anything else I'd regard as snake oiled marketing babble.
Best regards!
Btw, the output's ground terminal doesn't need any »control«, as it is the reference point. Anything else I'd regard as snake oiled marketing babble.
Best regards!
Of course you're right. My errror. DF is inversely proportional with output impedance (that I've meant)🙄!
Best regards!
Best regards!
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