so I DD / GG and used whisper clips throughtout my theater and DD/GG my equipment closet. I put an exterior grade 1 3/4" solid core door into the theater and a solid MDF interior into the equipment closet (both doors open to the hallway).

The exterior grade theater door has weather stripping and a threshold but no bottom. The equipment door has nothing (just prehung). These are HUGE gaps in my soundproofing. I have not set up my system, but with the doors shut I can easily hear people speaking in the hallway and room outside the theater.

Any suggestions?

so I DD / GG and used whisper clips throughtout my theater and DD/GG my equipment closet. I put an exterior grade 1 3/4" solid core door into the theater and a solid MDF interior into the equipment closet (both doors open to the hallway).

The exterior grade theater door has weather stripping and a threshold but no bottom. The equipment door has nothing (just prehung). These are HUGE gaps in my soundproofing. I have not set up my system, but with the doors shut I can easily hear people speaking in the hallway and room outside the theater.

Any suggestions?

The door bottom then is your leak. Put a weather seal/gasket/etc. at the bottom. If you want to go all out: http://www.soundproofingcompany.com/products/automatic_door_bottom/

The larger the gap, the bigger the issue, the lower the frequencies that escape. If you don't want specialized seals, then the next best thing is to hang the door lower by trimming the jambs so the gap at the bottom is much smaller. Alternately you might add a block to the underside of the door to reduce that gap.

Either of these options will risk the bottom of the door contacting things like carpet, etc. This works best on smooth floors.

Hard to serve two masters. If you have thick carpet, the door will require a sizeable gap. Best solution is a drop-down type of automatic bottom as linked. Keep up to a 1" gap at the bottom of the door, yet sealed when closed.