Quote:
Originally Posted by Msquared
PS - I wish someone here had the equipment to accurately measure the stock speaker-level signals across the audible frequency range so we could really see what GM gave us. I don't mean inferring the responose from SPL measurements in the cabin: that includes the driver's own response, which confuses the issue. I mean measuring the electrical frequency response at the signal wires. We need that for each variant of the Camaro's sound systems, and each pair of speakers to which they send signals. I'm an electrical moron and have no equipment, so I can't do it.
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Yes. I had this exact info for the last car I upgraded, working with an EE who had a nice bench of test equipment.
We used an audio test CD with frequency sweeps at normalized volume. Set the car for medium to high "system" volume and then measure the electrical outputs at the various speaker feeds to get readings for the EQ and relative volumes.
To be honest, I thought the newer integrated gadgets had some kind of calibration mode which did this automatically.