Bowers & Wilkins 804 D3 Technical Manual page 46

Bowers & Wilkins TECHNICAL SUPPORT
Next place the earpieces of the stethoscope in your ears and place the listening tube
around the piece on the Speaker Cabinet that you wish to examine.
Place the listening tube several inches in front of each driver in a multi-way speaker
system you can hear each individual driver to a great extent.
Pan between the drivers as shown in Figure: 58, by moving the listening piece
between the woofer and tweeter.
This allows very sensitive panning between drivers to listen for phase effects . . . such
as a notch in the frequency response at crossover. Carefully move the listening tube
about the surface of the enclosure noting the sound level remains consistent.
Figure: 58
Flow Port
Once these tests are complete and no leaks are found the Speaker is ready for its
final clean before being returned to the customer.
The contents of this document and associated files contain confidential information that is propriety to Bowers & Wilkins, and
are intended solely for the purpose of servicing the product. The information is intended for use by service technicians familiar
with electronic products. No part of the contents should be supplied or published elsewhere.
Page 46 of 51
Check around
the Tweeter
Check Mid - Range
Upper Base Unit
Lower Base Unit
Check around the Terminal Tray
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