Altec lansing CD912 User Manual

Page 2 of 11

Figure 2

Date Code Label located on the CD912-8A’s Shipping Container is located, in upper

right just above the Universal Product Code Label.

Tools/Material Required

• High Frequency Voice Coil Assembly Kit (Part No. CD912-8-DRK)

• Philip Screw Driver (Small Tip)

• Long Nose Pliers (Fine)

• 1” Wide Scraper

• Wide, Thin, Flat Screw Driver

• Masking Tape

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Figure 3

1. Place CD912-8A 12” Ceiling Speaker with Cone facing upward as shown in

Figure 3 on a clean, flat table.

Figure 4

2. Locate three (3) Philips Head screws (see Figure 4) that secure the Tweeter

Face Plate to the Tweeter Magnet.

3. Using a Philips Head Screw Driver remove the three (3) screws.

4. Carefully lift and remove the Tweeter Face Plate from the CD912-8A.

Page 4 of 11

Figure 5

5. Note - the backside of the Tweeter Face Plate has a “keyed recess” into which

the Base of the High Frequency Voice Coil Assembly fits. This recess

contains a Cork Gasket. Take care not to damage the Cork Gasket.

Figure 6

6. Figure 4 illustrates typical markings that may be found on the Tweeter Magnet

and High Frequency Voice Coil Assembly. The critical marking(s) to be

aware of is associated with the High Frequency Voice Coil’s keyed Plastic

(Black) Base. Note the Red Circle and White Line shown in Figure 6. These

markings denote the Positive (+) Polarity of the High Frequency Voice Coil.