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Reassembling the Magazine into the Spaceframe
1. Insert the Magazine, top first into the opening in the bottom of the Spaceframe. You will need to angle it (in a
similar manner as when you removed it) to get it to fit smoothly into the Spaceframe.
2. Once the Magazine is completely in the Spaceframe slide it towards the HF Driver so that the two parts of the
tilt-mechanism clear each other. Position the two parts of the tilt-mechanism so that they will mate and slide
the Magazine back until the tilt mechanism begins to telescope.
3. Locate the slots in the side of the foam gasket on the face of the magazine. Adjust the position of the Magazine
until these line up with the bolt holes in the flange on the waveguide. You may need to center the Magazine
(from side to side) before proceeding.
4. Locate the 1/4"x20x1.5" bolts that attach the Magazine to the Waveguide and the two "U"-channels. Place a
bolt through the center hole in one of the U-channels. Now insert this through the center hole on one side of
the Waveguide Flange and begin to thread it into the Magazine. You may have to move the Magazine slightly
to get the bolt to start. Be careful not to force the bolt or tighten it if you encounter too much resistance, as this
may damage either the bolt or the threads in the Magazine. Don't tighten any of the bolts more than finger
tight until all six bolts are properly threaded. Try moving the magazine around until the bolt threads easily.
Repeat this procedure for the other side of the Waveguide.
5. Install the remaining bolts. Now tighten all the bolts. Do not over tighten them as this may damage the
Magazine.
6. Re-connect the High Frequency Driver. Pay special attention to the orientation of the connector. The key
should face the rear of the spaceframe. Do not force the connector, it should slide in easily.
7. Lock the tilt mechanism by pulling the Magazine-Waveguide assembly up until you hear the locking pin click
into place. Warning: Failure to properly lock the tilt mechanism may result in injury, as the Magazine-
Waveguide assembly may unexpectedly change position as you place the unit in an upright position.
8. Replace the bottom Skid Plate, making certain that all eight screws are tight.
9. Carefully lift the unit to an upright position. Perform listening test and/or sine sweep on unit (using complete
drive rack) to verify proper operation.
High-Frequency Driver Removal and Replacement
The diaphragm can be replaced without removing the 2451SLJ compression driver from the horn. However,
removing the driver first is recommended as it makes access to the diaphragm easier and may prevent damaging
the new diaphragm. Field-replacement of diaphragms is often performed under duress and poor working
conditions. Replacement of the entire high-frequency driver with a spare driver ensures that the new driver and
diaphragm have been carefully assembled. You will need a 7/16-inch wrench.
This procedure is best performed in a clean, open, well-lit area. You will need to lay the unit down on it's face.
You may need to lay down a large piece of flat cardboard first. Be certain to place all the hardware that you
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