I guess you do have less cubic footage and power, so maybe that's the difference. I wish there was some way to convey the sound, but I doubt a video would do it justice.
Mine certainly doesn't make things rattle (thankfully), but it definitely fills out the low end with zero distortion and full, rich sound.
BTW, mine is pushed by an older Sony Xplod 250 watt running in mono (200 watt RMS into 2 ohm mono stable).
Kicker TCVT8.
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