The stamped frames are susceptible to damage in shipping, but Mavin has great service if that happens.

( note added by Mavin. In response to this customers shipping damage, I designed a packaging ring to use when shipping the speakers, this should limit any damage to the speaker during transit. )

I haven't run freq tests on them yet, listening tests only, but they drop in well in the Altec StageGig RM3010 box, and offer a much smoother sound than the stock woofer there, and more subjective oomph as well. That box is ~.2 cu.ft. I also tried in a .3 cu.ft. box, and it works fine there too. I modeled both but haven't verified responses. Haven't tried vented yet, but modeling shows it could go low in a large box (~1 cu.ft.).

They don't sound as loud as a couple other cheap 6.5s I have here, because they aren't shouty in the mids, and the bottom end is much stronger. The heavy paper cone may cause a lower rolloff as well.