Instructions/Installing the KF850z
NL8 and AP6 Upgrade Kits
The KF850z AP6 Upgrade Kit P/N 0006241 and the KF850z NL8 Upgrade Kit P/N 0006242 are available for the
KF850e loudspeaker. These two kits are the same but for the Electrical Assemblies.
Warning: Installation should only be done by an experienced technician. Improper installation may result
in damage to the equipment, injury or death.
Inventory the kit against the following bill of materials insuring the kit is complete.
Screw 1/4-20 X 1-1/2 LG SHCS Blk
Screw/M6 X 14mm LG HHCS
Bracket/Horn [KF850z Upgrade Kit]
Screw 1/4-20 X 1 LG PH PHMS Blk
Washer/Flat 1/4 Blk
Washer/Lock 1/4 Blk
Screw 1/4-20 X1 SHCS Blk
Ring/Aperture/Wood/10" Mid [KF850z]
Screw 1/4-20 X 4-1/2 LG SHCS Blk
Screw #8 X 1 LG PH PHSMS
Screw #10 X 16 X 3/4 PH PHSMS
Screw #8 X 5/8 PH PHSMS Blk
Electrical Assembly KF850z [NL8]
Electrical Assembly KF850z [AP6]
KF850z Kit installation requires the technician to remove and replace all transducer components. The HF
horn assembly is accessed from the front and the 15" woofer, 10" mid range, and electrical assembly from
To do this the enclosure will first be rested on its back, the grille
REMOVE AND DISCARD
removed, and the HF horn assembly disconnected, removed, and dis-
23 #8 X 5/8 LG PHILLIPS
HEAD SHEET METAL SCREWS
assembled. Its rear bracket will be re-installed into the new KF850z
HF horn assembly, which will then be installed into the enclosure.
After this is complete the enclosure should be repositioned onto its
front, and the 2 access lids, polyfill, input and crossover removed, the
new crossover installed, and its leads routed to the appropriate cham-
bers. Then the new 15" woofer and the new mid assembly will be
installed. The old polyfill should be restapled into both chambers and
the new electrical assembly installed.
Finally the enclosure will be stood upright, HF leads connected, test-
ed for continuity, and access lids and grille reinstalled.
Instructions: Tip the enclosure on its back and remove the 23
(DO NOT REMOVE)
Phillips head screws that mount the grille to the enclosure.