I have only had the old school round ones, but the friggin' pound. Small boxes & slammin bass- a great combo. In fact I have 2 8" solos waiting for a home in my car once I get an amp manly enough to run them.
i had the 2005 model solobaric L5 15" in a vented enclosure (didnt know the specs, it was ebay box). it got real loud with just 500rms watts off a hifonic amp.
im now rocking 2 12" solobaric L7's (gumetal versions/2002-2003) in a sealed with the same amp, sounds just as great. sacraficed loud for SQ.