Driver Replacement Procedure; Tweeter & Tweeter Diaphragm - Quested VH3208 User Manual

9 Driver replacement procedures
9.1 Tweeter and tweeter diaphragm
The tweeter is secured by 3 self tapping wood screws. Remove these with a posidrive
no. 2 screwdriver. Take out the tweeter and disconnect the two wires, noting which
colour goes to which terminal. If on removing the 3 screws that hold the tweeter there
is any difficulty in removing the unit do not try to force a blade between the cabinet
and tweeter, but use a small narrow bladed screwdriver in one of the screw holes to
gently lever out the tweeter.
If it is necessary to replace the diaphragm
a) Remove the 3 machine screws on the front plate of the tweeter using a
2mm hex driver.
b) De-solder and unwind wires from the terminal tags
c) Remove diaphragm assembly and replace with the new diaphragm. The
Ferrofluid has the appearance of oil and is dark brown in colour and should
cover about 1/3 of the coil. If there is less than this then additional Ferrofluid
should be added. This can be obtained from your dealer/distributor or
directly from Quested. The ferrofluid reference is
It should be noted that ferrofluid is best added as shown in the digram
below. The fluid should never cover more than 1/2 the coil.
d) Wrap the wires from the diaphragm around the corresponding tags
e) Keep the wire slightly taught, but do not strain
f) Re-solder the wires and re-assemble.
Ferrofluid
Dip wire in ferrofluid, a small amount will be retained on the wire
hold wire over the tweeter gap and the magnet will attract the
fluid from the wire into the gap. Do this 3 or 4 times in different
position on the tweeter, then check by inserting the new diaphragm
to see the amount of fluid in the tweeter.
2
1
Tweeter
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