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Cone travel one way more than the other
The device under test is Eminence Lab12c. It has been recoiled.
When I test the speaker on free air feeding it a sine wave signal at 30hz, everything is as should be – the cone moves an even distance both ways and starts to scream for help when movement reaches 13mm one way as this is the xmax.
But when I feed it a mastered track that has a rhythm and a bassline the cone moves one way a whole lot more than the other (about 13mm inward vs 5 outward). I tried cutting off the lower frequencies, I went until a bandpass region of 55-100hz. The amp is not clipping.
Why do I have this question is because, the speaker was in a TL enclosure and the sub freqencies sounded nice and could hold the power they are supposed to but at 60Hz up where the kick bass starts to play the speaker started to rattle. So I took it out for a test and this is what I saw.
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