This chapter deals with preparing the cabinet for installation of the completed chassis. But
first, we need to take inventory of the parts that came installed with the cabinet.
Cabinet Inventory
Combo Cabinet
1. Handle w/ mounting hardware
– There should be a single flat black handle with two
gold end covers mounted to the top of the cabinet.
2. Feet, rubber
– There should be four rubber feet attached with screws to the underside
of the cabinet.
3. Back panels, upper and lower
with screws
– There should be two back panels. The
top back panel should be secured with four panel screws, the bottom panel should be
secured with four panel screws. All panel screws should have a finishing washer.
4. Baffle screws
– There should be eight black oxide coated screws with matching
black finishing washers holding the baffle in the cabinet.
5. Speaker bolts
– There should be four black oxide coated bolts for securing the
speaker to the baffle board.
Head Cabinet
1. Handle w/ mounting hardware
– There should be a single flat black handle with two
gold end covers mounted to the top of the cabinet.
2. Feet, rubber
– There should be four rubber feet attached with screws to the underside
of the cabinet.
3. Back panel w/ screws
– The back panel should be secured with four panel screws.
With either cabinet, I encourage inspecting all assembly screws to insure they are tightly
holding the cabinet together. In the past I've found that sometimes some screws aren't fully
tightened down during assembly.
Drilling the Four Chassis Mounting Bolts (Head and Combo)
4.2.1 Combo Cabinet
Step 1
– Remove the back panel and lay the
panel on the work table with the vinyl covering
facing down.
Step 2
– With the empty aluminum chassis,
center the chassis on the back panel with the
control panel side of the chassis flush against the
back panel cutout (photo 4.2a).
Step 3
– Make a mark through each of the four
mounting holes of the chassis onto the cabinet
Cabinet Preparation
4
TubeDepot.com 7
4.2
4.1
CAUTION
The following steps call for drilling the mounting holes in the cabinet for the chassis. Make
sure to review, reread and remeasure at each step to reduce potential drilling errors.
Because (as the wise old amp builder's saying goes) what is drilled, cannot be undrilled.
photo 4.2a
