Bowers & Wilkins PV1D Manual Download

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ENGLISH

Speaker

Modifies the PV1D's response to blend optimally with
the main speakers. It is important that you configure
this section for all applications.

1. For 2.1 stereo applications not using a surround

processor, a low-pass filter is calculated to match
the subwoofer to the natural bass response of the
main speakers.

2. When using a surround processor, the internal

low-pass filter of the PV1D is not required,
but its response still requires adapting to the
main speakers. In addition, you should use our
recommended settings for certain parameters of
the processor. See also Section 6 –

Configuring a

Surround Processor

The menu options are

User

and

List

Selecting

List

advances to the

Choose Speaker

screen where you may select one of a number of
specified Bowers & Wilkins models. If the name of your
main speakers is listed here, simply select it and all
parameters will be set automatically.

At the top of the list you will initially see the option

None

. The PV1D SubApp™ program will allow further

Bowers & Wilkins models to be selected from a drop-
down list and any model selected there will replace

None

Certain powered speakers, such as Panorama. already
include subwoofer filtering. For such main speakers,
select

List

then

None

and do not overwrite

None

from

SubApp.

Selecting

User

provides the option of specifying

a custom low-pass filter. Select

User

if your main

speakers are not listed either internally or within
SubApp™ or are not a Bowers & Wilkins model.

The default is

Speaker

and the default speaker is the

first named on the list after

None

The low-pass filter

User

parameters are

Freq

(uency),

Slope

and

Phase

Select

Freq

to set the low-pass cut-off frequency of

the filter to match the high-pass –6dB cut-off frequency
of the main speakers. For Bowers & Wilkins speakers,
this can be found in the technical specification under
Frequency Range. If the specification of your speakers
only quotes a –3dB frequency, multiply this by 0.6 for
closed-box systems and by 0.7 for vented-box (reflex)
systems to get a close enough approximation to the
–6dB frequency. The default is

80Hz

Select

Slope

to set the low-pass filter slope of the

filter to match the high-pass roll-off slope of the main
speakers. If the slope is not given in the speaker’s
specification, select 4th-order if the main speakers are
vented (ie have a reflex port) or have a passive radiator
(sometimes called an ABR) and 2nd-order if they do
not. The default is

4th-order

as the majority of Bowers

& Wilkins speakers are vented-box types.

Select

Phase

to adjust the phase integration of the

PV1D and the main speakers. Adjusting the

phase

can

be useful to overcome audible problems of integration
between subwoofer and main speakers, usually with
room acoustics at their source. Set the Phase initially
to

0°

for the 4th-order option and

180°

for the 2nd-

order. Compare these settings with the other options
on a variety of music with significant bass content
and choose the option that gives the fullest bass. The
default is

0°

Low-Pass

User
List

M-1 (2011)

Choose Speaker

None
M-1 (2011)
M-1 (2005)
686
685

User Low-Pass

Freq

80Hz

Slope

4th-order

Phase