Much like the L100 the L200 can be simply/cheaply modified to adjust the bass with a plumblers plug by closeing one of the two ports, this is reversable. The L200b was an updated L200.
Yep, that "less wank" guy told me about changing the box tuning by plugging the 2nd port
with a pipe plug from Home Despot - but we just call it a Zilch plug now...
The ports are matched left and right - this box has the right port plugged.
That was just the start of a series of updates I did to mine as it evolved over 6 or so years.
I have a 4333 based crossover in mine to run the 2405 slot I installed top dead center on the front baffle,
so I have 2 LPads on the right where there was originally just one ...
Someday I'll have a new foilcal made for them, but its a needless expense for now.
I had also pulled the LE15 woofer and substituted a 2234 - thats a 2235 without the mass ring.
Since I am using an external midrange and walnut smith horn,
I have a plywood cap over the center hole where the LE85 used to go.
I originally had OEM-color brown grill foams, but now use a custom black pair that looks better to me.
I also made wheeled footers that just fit around the original MDF footers, to protect the fragile footers,
and make it easier to move the boxes to vacuum.