The 910 has a little more gain in the mid-range than the E-66, and a little more bottom as well. Highs are reduced a bit. Overall, rather "flat" sounding.
The 710 is very close to the E-66, but just a little fuller, but not as flat as the 910. (They still have a little "dip" in the mids.)
The TW's sound like a 710 to me, except with a slight "hump" in the mids instead of a "dip". Overall the TW is very round and full, with none of the "metallic" sound of the E-66 or 710 (which I believe comes from that "dip" in the mid-range). [This message was edited by Donny Hinson on 06 May 2003 at 08:42 AM.]
