Guys , I did two tweaks to a pair of these newer series 6 mk2 901's, these speaker drivers are a little different than the older series 901's. With these new speaker drivers they now use different lighter paper speaker cones and they now have plastic dust caps for better highs and they went back to using cloth surrounds again.
I started by taking some very fine sandpaper and going around all the paper speaker cones so the Elmer's carpenter wood glue would stick to the paper cones better. I used a very small art brush and put a very thin coat around the paper cones. I did not put any glue on the plastic dust caps and you have to be very careful not to get any glue on the cloth surrounds. I let the glue dry for 48 hours before playing any music. I waited 3 months before doing my wood stain tweak. I used Minwax wood stain and with this tweak I coated the paper cones and I also coated the plastic dust caps and on the back side of the speaker paper cones I coated that too and also coated the voice coils with wood stain too. I again waited 48 hours before playing any music. Now this part took over a year TO break-in so the voice coil wires would loosen up and then the speakers sounded much better. I next fine tuned the speakers to suit my taste better. It took three more coats of wood stain on the front side only of the paper cones and plastic dust caps before I really loved these speakers. Now these speakers sound amazing with the speakers turned around backwards, BEFORE these tweaks, I did not like them turned around backwards at all. Now these speakers have very nice highs and a very rich mid-range and a very good bottom end too. If Tone Audio only knew what was hiding inside these speakers. I have no idea what these tweaks would do to these older series 901's because they are so different than these latest series 6 mk2's. My QuickSilver GOLD tweak inside my Yamaha a-s2000 amp, has made it sound like REFERENCE GEAR now and that has made these modified 901's really SING like never before.
