Hi,
If you want small go for the DM5's. Invert them and put them on good quality stands.
I can't remember whether I added anymore stuffing to what was in there, probably did.
I did add a trap filter to tame the extreme treble peak of the the tweeter, but I was
young, and nowadays I wouldn't be able to hear the peak or the trap filters effect.
I don't recall when I decided inverted sounded better, but you can be sure it did.
My brother was no classical fan, but I can assure you the DM5's were really no
slouches at all when it comes to bashing out more prosaic genres than classical
Mainly due to the fact they were backed up by rather good system for the time,
which I will take all credit for, the rebuilt turntable was an utter boogie machine.
Wish I could tell you something about the DM2's, but I can't, no experience.
Same with all the various versions of the DM4's, which are all good AFAIK.
rgds, sreten.
For vented boxes of the period a favourite tuning trick of mine is port
detuning. A peice of open cell foam port length x 3 port diameter
folded into a tube and inserted into the port, ~ 6 to 9 mm thick.
It will tighten and extend the bass, and reduce port chuffing.