This was posted on their website abut a dozen years ago:
INSTRUCTIONS FOR THE D-VIP (DOUBLE VAR-I-PHASE CONTROLS)
Please Note :
The D-VIP controls work best with our new HRW pickups.
Each HRW pickup, has four lead out wires, plus ground, plus complete full length wire shielding for all 5 wires.
( Right handed player )
Sitting in the playing position.
Lower left = master volume control, for both pickups
Lower right = master tone control , both pickups.
Upper left VIP control knob.
10 = in phase, for fingerboard pickup.
0 = out of phase, for fingerboard pickup.
( mini switch down) Please note that when on "O", there is little volume, because the bass and mid-range have been phased out.
Upper right VIP control knob.
10 = in phase, for bridge pickup.
0 = out of phase, for bridge pickup.
( mini switch down) Please note that when on "O", there is little volume, because the bass and mid-range have been phased out.
Two Mini Switches: ( 3-way )
The one on the left = Fingerboard Pickup,
The one on the right = Bridge pickup.
Position: 1 ( Down) = VIP ( VAR-I-Phase)
The only time the VIP works, is when the mini-switch is down, for that pickup.
Position : 2 - ( Middle) = FULL, (Both Coils), ( normal )
Position : 3 - ( UP ) = COIL TAP, ( single coil)
Note: Main toggle switch, works like normal.
UP: Front pickup.
Middle: Both pickups.
Down: Bridge pickup.