Amasingly, I've been trading emails with the president of OHM today (try that with the prez of HK )
here are his tips...
Hi Tom,
Yes, going to much thicker wire like 12 gauge MonsterCable is a good idea. You will find the cabinet pretty full of tuflex. Keep it that way. Taking it all out and adding many extra braces between the other five sides of the cabinet can improve the sound. So can adding two more long bolts in the other two corners.
It is old Ohm customers that keep us in business.
Feel free to call me personally to discuss your needs and options.
Good Listening!
John Strohbeen
President
800-783-1553