To measure continuous power, you apply a continuous voltage and increase its level until clipping is observed into a known load. Say you apply 2Vrms into a 4 Ohm resistive load and observe clipping. That's a total of 1W continuous power (2*2/4).
To measure dynamic power, you apply a transient voltage into the same load. Say you apply 4Vrms for 10 cycles and observe clipping in the last 3 cycles. You could then say the dynamic power is 4W (4*4/4) for 7 cycles. If those cycles you applied was a 60Hz mid-bass, you could say the dynamic power is 4W for 117msec (16.7 msec/cycle * 7 cycles). More accurately, I would say I can support 4W into a 4 Ohm resistive load for seven, 60Hz cycles.
1W of this dynamic power comes from the wall socket and the remainder from charge in the storage capacitors.
In this example, the dynamic headroom is 10log(4/1)=6dB. That's a damned impressive LPS!
I would also keep the power supply voltage fixed at say 120VAC for all tests.
Last edited by Mojo; 10/29/19 04:28 AM.
