15" Speaker identification/ohms/etc

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DroneWarrior
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Joined: 2009-07-18
15" Speaker identification/ohms/etc

I just got a box of 4 (apparently) new-old-stock ESR 15" speakers off ebay and am curious as to whether there's any way I can identify the ohms and wattage for each? The only markings on the speaker are "EARTH SOUND RESEARCH" "B15" and a serial number - is there some way I can test the raw speaker for this information? I bought them to install in an Earth 2x15 cab, which had blown original speakers. This cab was 8 ohms when I got it, with the original Earth speakers; Is it safe to say other Earth 2x15s from this period (like the super bass or producer ones) were also intended to run at 8 ohms, so that perhaps the individual speakers are 4 ohm?