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That is quite informative information there... I hardly understand it.

I am concerned with the rms at this point since I will be driving it with a low power single amp unit. My limited experience with auto (or any) stereo is that matching ohms and rms works nicely - speaker and head unit output.

If I understand correctly, you are representing the noise production efficiency capabilities of the speaker based on input wattage? At what frequency would this test be standardized (if there is a standard)? Or do they simply play Lynyrd Skynyrd - Simple Man at 1 watt as a standard?

Thank you in advance for any additional light or sound that you can shed in my direction.

My 72 340 said

Spec wise, I would go with the Pioneers for the little extra $$, the 92dB SPL (Sound Pressure Level) rating is going to be noticeably louder than the 88.1dB SPL rating of the T3's.

SPL is the speaker's efficiency rating and is measured with a dB meter at a distance of 1 meter from the speaker with 1 watt of power driving it, for every 3dB increase in SPL you need 2x the power from the amp.

For example, at 32 watts RMS from the amp the Pioneer's would put out about 109dB SPL, at the same 32 watts with the T3's it would be about 103dB SPL. To match the Pioneer speakers 109dB SPL, the T3's would require 128 watts of power.

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