Night of The Living Bassheads

[Josh Ricci]

Interesting.

I've definitely noticed a trend, where a lot of my smaller drivers (6" and under) measure close to the published specs, while the larger drivers are WAY off.

For instance, these Diyma12 drivers probably weigh 50lbs each, and my measurements are easily 50% different than the published spec.

This might be explained by what Josh posted. I've noticed that the output level is very very low with the DATS, because the efficiency of the woofer is something like 84dB.

That's basically what I was seeing. Small 5" woofers seemed to be fine. A 400g mms driver with a huge coil not so much. If the specs pulled seem to be WAY off or don't make sense they are probably not right.