Got some things in today. The 9886 is for my friend. The zapco is for myself.
9886:
No headunit preout clipping even at full volume on a 0dB, 1000hz tone.
Preout voltage = 4.27v.
Zapco 1000.4 clipping:
This is something I wanted to see for myself; testing voltage out without a load and with a load.
The load used was measured at 3.5ohms. This dummy load came from parts express.
Used the alpine headunit, same test tone at full volume. controlled attenuation from the zapco software to control clipping points.
The power supply presents a steady 13.8v output to the amp.
Alright, so here we go...
No load presented. Just took measurements of the bare wires coming out of the amp:
As you can see in the picture below, the maximum non-clipped voltage is about 22.75vac. That equates to 144w rms.
Now with the dummy load put in, and (approximately) the same voltage reading, you can see how severely clipping the signal is:
Now, with the dummy load, I backed the output of the amp down to the highest non-clipped point. That gives me 17.56vac. This = 89w rms.
So, there you have it.
9886:
No headunit preout clipping even at full volume on a 0dB, 1000hz tone.
Preout voltage = 4.27v.


Zapco 1000.4 clipping:
This is something I wanted to see for myself; testing voltage out without a load and with a load.
The load used was measured at 3.5ohms. This dummy load came from parts express.
Used the alpine headunit, same test tone at full volume. controlled attenuation from the zapco software to control clipping points.
The power supply presents a steady 13.8v output to the amp.
Alright, so here we go...
No load presented. Just took measurements of the bare wires coming out of the amp:
As you can see in the picture below, the maximum non-clipped voltage is about 22.75vac. That equates to 144w rms.

Now with the dummy load put in, and (approximately) the same voltage reading, you can see how severely clipping the signal is:

Now, with the dummy load, I backed the output of the amp down to the highest non-clipped point. That gives me 17.56vac. This = 89w rms.

So, there you have it.