This might be a simple newbie question but I can't quite figure it out myself.
I want to know whether or not the power consumed by a class d board is relative to the audible level from the speakers.
To control the audible level of the speakers one will be attenuating the gain of the signal being fed to the amp. If this signal has a high degree of attenuation will it consume less power than if the gain was 0dB? Or will the power consumption remain constant regardless of the strength of the input signal.
My intended configuration is 2x CxD300 amps sharing a 500w SMPS, if that makes any difference.
Thanks.
I want to know whether or not the power consumed by a class d board is relative to the audible level from the speakers.
To control the audible level of the speakers one will be attenuating the gain of the signal being fed to the amp. If this signal has a high degree of attenuation will it consume less power than if the gain was 0dB? Or will the power consumption remain constant regardless of the strength of the input signal.
My intended configuration is 2x CxD300 amps sharing a 500w SMPS, if that makes any difference.
Thanks.
The power dissipated in the amp will vary according to the level it is playing. With class-b amps the worst case is when the amp is outputting half the rail voltage, with class-d it tends to be at max power due to switching losses.
Ok so the power consumption is proportionate to the input gain, and I can control that gain with the stepped attenuator. My question was related to a 12v system and whether it not it would play for longer on one battery if the volume was lower. Now I know that it would.
Perfect, thankyou 🙂
Perfect, thankyou 🙂
"The power dissipated in the amp will vary according to the level it is playing. With class-b amps the worst case is when the amp is outputting half the rail voltage, with class-d it tends to be at max power due to switching losses."
He was asking for the Power consumption, not the dissipation. Consumption = Dissipation + Power output. Consumption is always highest at full output level.
He was asking for the Power consumption, not the dissipation. Consumption = Dissipation + Power output. Consumption is always highest at full output level.
So my response was correct. It seems from his reply to me though that it is the overall consumption of the system he was interested in. In which case he has figured it out and your answer backs that up.
Semantics
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