Measuring compression drivers. Questions.

[Robh3606]

Is there a way to sweep these drivers without having to put the back cap on?

You are supposed to do a sweep open as part of the install before the cover is on. There is no reason you can't screw on test leads where the regular leads would go. The frequency sweep range and voltage on the PDF Aural Test

Rob

A.
PREPARATION
1. Check unit for damage (cracked throat, shifted top plate, etc.) Remove front
cover and old diaphragm assembly. On ring radiators, remove inner cone and
outer horns and unsolder old diaphragm.
2. Using gap gauge, check gap for size and alignment.
3. On 2-inch throat drivers, tap on top phasing plug. The unit should make a solid
sound. A “hollow” or “clicking” sound indicates a loose phasing plug.
B.
INSTALLATION
1. Fold piece of masking tape lengthwise around cardboard digger with adhesive
side exposed. Insert in gap and rote to clean out debris. Continue cleaning until
tape is clean when withdrawn. Inspect visually with magnifying light.
2. Inspect new diaphragm for damage. Line up holes in diaphragm to mounting
pins on the driver. Carefully lower assembly into place. Replace diaphragm
mounting screws. On ring radiators, solder leads to terminals.
3. On drivers, hook unit up to oscillator set at correct input voltage indicated on the
appropriate technical manual and sweep according to technical manual. Listen for
buzzing. Use small mallet to tap lightly on side of diaphragm frame until it is centered
in gap and buzzing ceases. Tighten down diaphragm mounting screws.
4. Reconnect terminal leads onto diaphragm assembly and replace cover. On ring
radiators, replace inner and outer horn.
5. Perform final sound test.