Caution: While we are pleased to provide this information on how to replace a diaphragm, we strongly recommend that you seek professional support for these procedures in order to ensure long term component performance.

If you wish to proceed, please follow these steps very carefully, and read the entire document before starting the process.

Supplies and Tools Required:

•         Soldering gun
•         Screwdriver for 4 mm Hex screws
•         Tweezers

1. Unsolder the lead wires from the fast-on terminals, being careful not to overheat the Faston connector.

2. Remove the four outer screws

3. Rotate the transducer upside down

4. Pull up the upper part of the transducer away from the magnet structure

5. Carefully take out the diaphragm, supporting it from the centre ring

6. Put the new diaphragm in place. Use the tweezers to insert the lead wires into the fast-on terminals

7. A white shim may be present when you remove the MF diaphragm. Please take care to leave it in place when you replace the diaphragm.

• This shim is not always present. Some units may require it to precisely adjust the clearance between the diaphragm and the phase plug.

8. Hold the diaphragm on the inner and outer ring and place it on the magnet structure, taking care to align the holes in the outer ring.

9. Fix the screws in place.

The recommended screw torque is about 3 Nm.

10. Solder the lead wires on the Fast-on terminals, being careful not to overheat the Faston connector.

11. It is advisable, at this point, to do an acoustic test, to verify that you have installed the diaphragm properly:

a.       Hook up the driver to an oscillator and an amplifier.

b.      Conduct a sweep test from 200 Hz to 1000 Hz, applying 3 – 4 V rms. During the test you should not hear any noise or strange vibration; instead, you should hear a "clean" sweep sound. If not, it is possible that some particles of foreign matter were left in the gap.