Into what impedance do you want to dissipate 50W?Greetings
I am searching for a 50 Watt RMS MONO Audio Amp 12 volt DC
It is needed to drive an alarm system - not HiFI
The Ebay units I have found require an AC power supply
Suggestions please
The most you're going to get at 12V is 30 W.Greetings
I am searching for a 50 Watt RMS MONO Audio Amp 12 volt DC
It is needed to drive an alarm system - not HiFI
The Ebay units I have found require an AC power supply
Suggestions please
Correct with that amp.The most you're going to get at 12V is 30 W.
Your calculation uses the peak voltage but the peak-to-peak voltage should be used. Then the power in 8 ohms if the losses are ignored is only 2.2W.RMS power into 8 Ohms from 12V comes out to 9W by my calculation:
(12 x 0.707) ^ 2 / 8 = 72. / 8 = 9
Bob
Did that use what is called a Parallel-DC, Series-AC amplifier? If so, would that be today an outdated method to achieve a high output level from an amplifier with relatively low power supply voltage?Correct with that amp.
Back in the day I remember the Federal Signal police sirens putting out 55 watts RMS into a 10 ohm resistor in the siren mode.
25 watts in the PA mode.
That was running off 13.8 volts. The amp was push pull driving a transformer.
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