I have two of these that a friend said were good SQ subs, unlike the new "L"-series solo's which r basically an SPL sub. This friend has a bad habit sometimes of speaking beyond his knowledge, if u know what I mean. So I wanted some other opinions on these. Keep in mind these r the OLD SCHOOL round solos and not the newer square ones. I would appriciate the input of anyone at all familiar with the older, ROUND style solobaric subs. Thanks.