Power rating for spiky waveform

le256 · 15th February 2004, 05:45 AM

I have a 3" mid-range driver rated 20W peak and 10W RMS. How much power could it take for a very spiky waveform like a square wave through a (1st-order) highpass filter?

sreten · 15th February 2004, 11:01 AM

Generally mid units can take phenominal peak power inputs,
as long as the transient is within excursion limitations, and
the average thermal power is within thermal limits.

(The high power transient must be short compared to the
drivers thermal time constant, so its not heated too much)

Simply put a spiky waveform has peak to average ratio,
increasing this ratio barely affects the average power.

So for a 10dB ratio we are talking a 100W amplifier, for
a 20dB ratio a 1000w amplifier, its already getting silly.

So basically you do not need to worry about transient power handling.

sreten.

15th February 2004, 05:45 AM	#1
le256 diyAudio Member Join Date: Feb 2004 Location: Ottawa	Power rating for spiky waveform I have a 3" mid-range driver rated 20W peak and 10W RMS. How much power could it take for a very spiky waveform like a square wave through a (1st-order) highpass filter?

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15th February 2004, 11:01 AM	#2
sreten diyAudio Member Join Date: Nov 2003 Location: Brighton UK	Generally mid units can take phenominal peak power inputs, as long as the transient is within excursion limitations, and the average thermal power is within thermal limits. (The high power transient must be short compared to the drivers thermal time constant, so its not heated too much) Simply put a spiky waveform has peak to average ratio, increasing this ratio barely affects the average power. So for a 10dB ratio we are talking a 100W amplifier, for a 20dB ratio a 1000w amplifier, its already getting silly. So basically you do not need to worry about transient power handling. sreten.

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