9
Controls
Volume:
Adjusts the sound level of the subwoofer. A typical setting is around 10 o’clock.
Crossover (Hz):
Adjusts the frequency of the low-pass filter for the subwoofer.
Polarity (0° or 180°):
Selects regular (0°) or inverted (180°) polarity for the subwoofer. Set this
switch to provide the fullest, most dynamic bass. The distinction of phase will be most audible
on low-frequency percussion instruments or music with a continuously repeating bass line.
Power off/auto/on (PV800 only):
Set to
auto
, the PV800 turns on automatically when a signal
is presented to it. Set to
on
, and the PV800 will stay on all the time.
The PV600 and PV400 have auto-on circuitry that turns the subwoofer on when a signal is
presented, and turns off if no signal is detected for 15 minutes.
NOTE:
Power is always supplied to the subwoofer electronics unless it is unplugged. The auto-
on circuitry only activates or deactivates the power amplifier.
The PV600 and PV800 volume control is on the front of the subwoofer.
0
1
2
3
4
5
6
7
8
9
10
volume
Boston
3.0A 250V
CAUTION: Disconnect supply cord before replacing fuse. For continued protection
against risk of fire, replace only with same type fuse.
ATTENTION: Debrancher avant de remplacer le fusible. Utiliser un fusible de
rechange de même type.
120V 60Hz 3.0A
C A U T I O N
R I S K O F E L E C T R I C S H O C K
D O N O T O P E N
0
°
180
°
polarity
on
power
off
auto
50
80
150
120
left
right
speaker level in
crossover (Hz)
use
crossover
control *
bypass
crossover
control **
line level in
PowerVent Powered Subwoofer
®
PV800
* use crossover control
:
removes high frequencies; use with sources lacking
suitable filtering (most products without Dolby Digital or THX), or where manual
control is desired.
** bypass crossover control: direct to woofer; use with sources having built-
in crossover controls or bass management (most products with Dolby Digital
or THX).
NRTL/C
ANSI/UL-1492
LR106476
crossover (Hz)
volume
power
0
°
180
°
polarity
line level in
1.0A 250V
CAUTION
R I S K O F E L E C T R I C S H O C K
D O N O T O P E N
left
right
speaker level in
75
100
Direct
125
CAUTION: Disconnect supply cord before replacing
fuse. For continued protection against risk of fire,
replace only with same type fuse.
ATTENTION: Debrancher avant de remplacer le fusible.
Utiliser un fusible de rechange de même type.
120V 60Hz 1.0A
PowerVent Powered Subwoofer
®
PV400
NRTL/C
ANSI/UL-1492
LR106476
use
crossover
control *
1.25A 250V
CAUTION
R I S K O F E L E C T R I C S H O C K
D O N O T O P E N
CAUTION: Disconnect supply cord
before replacing fuse. For continued
protection against risk of fire, replace only
with same type fuse.
ATTENTION: Debrancher avant de
remplacer le fusible. Utiliser un fusible de
rechange de même type.
120V 60Hz 1.25A
bypass
crossover
control **
75
100
125
150
* use crossover control
:
removes high
frequencies; use with sources lacking suitable
filtering (most products without Dolby Digital
or THX), or where manual control is desired.
crossover (Hz)
power
0
°
180
°
polarity
left
right
speaker level in
PowerVent Powered Subwoofer
®
PV600
line level in
** bypass crossover control: direct to woofer;
use with sources having built-in crossover
controls or bass management (most products
with Dolby Digital or THX).
NRTL/C
ANSI/UL-1492
LR106476
PV 4/6/8 MANUAL 7.1.99 ƒ 7/30/99 4:01 PM Page 9
