landofshane
New Head-Fier
- Joined
- Jan 30, 2011
- Posts
- 38
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- 10
Hi everyone.
Can anyone help me understand what the power usage of a class D amp would be when there is no input signal?
I know it's not directly a headphone question, but I'm hoping some smart DIYers here may happen to know this stuff
Background:
* I'm running a squeezebox system and want to add more zones.
* I've ordered a class D 15w mini circuit board to experiment with whether it'll do what I need.
* Being a bare component board, there's no power on/off.
* I can use the sqezebox to adjust volume/power instead, but that would mean leaving the amp on all the time.
Having looked through the basic Class D schematics I'm confused as to how efficient they are when there is no input signal. It looks as though everything up to the low pass filter would keep operating even if there is no input.
Am I right in thinking that the power usage of these parts would be absolutely minimal and not worth worrying about and the power usage would only really start when a signal is present to amplify?
I know that as a 15w amp the power usage will be minimal anyway, but if this setup works then I'll probably get a few and also of larger sizes for outdoor speakers.
Thanks for the guidance.
Can anyone help me understand what the power usage of a class D amp would be when there is no input signal?
I know it's not directly a headphone question, but I'm hoping some smart DIYers here may happen to know this stuff
Background:
* I'm running a squeezebox system and want to add more zones.
* I've ordered a class D 15w mini circuit board to experiment with whether it'll do what I need.
* Being a bare component board, there's no power on/off.
* I can use the sqezebox to adjust volume/power instead, but that would mean leaving the amp on all the time.
Having looked through the basic Class D schematics I'm confused as to how efficient they are when there is no input signal. It looks as though everything up to the low pass filter would keep operating even if there is no input.
Am I right in thinking that the power usage of these parts would be absolutely minimal and not worth worrying about and the power usage would only really start when a signal is present to amplify?
I know that as a 15w amp the power usage will be minimal anyway, but if this setup works then I'll probably get a few and also of larger sizes for outdoor speakers.
Thanks for the guidance.