Polk Audio Subwoofers System Manual DB1040 Db1040dvc

User Manual: DB1040

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WIRING DIAGRAMS FOR db840, db1040, db1240 (Single Voice Coil Hookup)
Please make certain that your amplifier is rated to carry the specified load.

Single 4 Ohm load.

With speakers wired in parallel: Two 4 Ohm
speakers will present a 2 Ohm load.

DUAL VOICE COIL WIRING DIAGRAMS FOR db840DVC, db1040DVC, & db1240DVC
Please make certain that your amplifier is rated to carry the specified load.

With coils in parallel, a dual 4 Ohm speaker
will present a 2 Ohm load.

With coils wired in series, a dual 4 Ohm speaker
will present an 8 Ohm load.

DUAL VOICE COIL WIRING DIAGRAMS FOR db840DVC, db1040DVC, & db1240DVC

With coils and speakers wired in parallel, two dual
4 Ohm speakers will present a 1 Ohm load. (Not
recommended unless amplifier is rated for 1 Ohm
operation.)

With the coils wired in series and the speakers
wired in parallel, 2 dual 4 Ohm speakers will present
a 4 Ohm load.

With the coils wired in series and the speakers
wired in parallel, 3 dual 4 Ohm speakers will present
a 2.7 Ohm load.

ENGLISH
PRECONDITIONING PERIOD
db Subwoofers will achieve even greater performance once
they are thoroughly broken in. To break in your new db
Subwoofers, play 20 to 30 hours of music at moderate levels.

OPTIMAL CROSSOVER SETTING
We recommend using an active crossover with a 12 to
18dB per octave low pass filter slope, and setting it to
an initial setting of 80 to 90Hz as a good starting point.
This is an optimal crossover setting on most vehicles.
INVERTING PHASE
Depending on the placement of your subwoofer enclosure
and associated components, it may be necessary to invert the
phase of one or another of your system’s connections in order
to gain better subwoofer/mid-range blending. Inverting the
phase simply means switching the positive connections with
the negative connections at the amplifier. If you choose to do
this, invert the phase of only one set of speakers (either your
mains, or your subs, never both).
LOW FREQUENCY CUT-OFF FOR
MID-RANGE SPEAKERS IN
SYSTEMS WITH SUBWOOFERS
Now that you have a subwoofer in your system, you may
want to decrease the amount of bass going to your midrange
speakers. This will get you better mid-range sound and
increase the power handling. There are two ways to roll off
the bass before it gets to your mid-range speakers. One way
is to use a “bass blocker,” a capacitor placed in series with
the speaker input. Bass blockers are installed in series,
one end connected with the positive lead from your amplifier
and the other end connected to the positive lead of each of
your speakers. Bass blocker capacitors (200 microfarad @
100V, non-polarized) are available at any Radio Shack or
electronic parts supply house. The other route is to use an
electronic crossover device that allows filtering below 100Hz
or so. Find these devices at your authorized Polk Audio dealer.

ENGLISH
SUBWOOFER SPECIFICATIONS
db840

db1040

db1240

Type

subwoofer

subwoofer

subwoofer

Driver Size

8"
(203.2mm)

10"
(254mm)

12"
(304.8mm)

Thiele/Small Parameters

Nominal Impedance

4 Ohm

4 Ohm

4 Ohm

Frequency Response

30-200Hz

28-200Hz

27-200Hz

Fs (Hz)

42Hz

35Hz

30Hz

Re

3.5 Ohm

3.5 Ohm

3.5 Ohm

Le

2.3mH

3.0mH

3.0mH

Qms

13.4

9.1

10.4

Qes

0.58

0.59

0.46

Qts

0.56

0.55

0.44

Vas

0.54ft3
(15.4L)

0.99ft3
(28.3L)

2.54ft3
(71.85L)

Sd

35.65in2
(230cm2)

54.25in2
(350cm2)

80.6in2
(520cm2)

Power Handling (Watts continuous)

180 Watts

270 Watts

360 Watts

Power Handling (Watts peak)

360 Watts

540 Watts

720 Watts

Sensitivity (SPL at 1 Watt / 1 meter)

85dB

86dB

88dB

Xmax (Linear)

0.24"
(6.1mm)

0.3"
(7.5mm)

0.3"
(7.5mm)

Voicecoil Diameter

1 1/2"
(38.1mm)

2"
(50.8mm)

2"
(50.8mm)

Mounting Depth Top Mount

4"
(100mm)

5 1/2"
(138.9mm)

6"
(152.4mm)

Mounting Depth Bottom Mount

4 9/16"
(115.8mm)

6 1/4"
(158.2mm)

6 3/4"
(171.4mm)

Mounting Diameter

7 1/16"
(179.4mm)

9 1/16"
(230.2mm)

11"
(279.4mm)

SUBWOOFER SPECIFICATIONS
db840DVC

db1040DVC

db1240DVC

Thiele/Small Parameters

Type

subwoofer

subwoofer

subwoofer

Driver Size

8"
(203.2mm)

10"
(254mm)

12"
(304.8mm)

Nominal Impedance

dual 4 Ohm

dual 4 Ohm

dual 4 Ohm

Frequency Response

30-200Hz

28-200Hz

27-200Hz

Fs (Hz)

43Hz

35Hz

30Hz

Re

3.4 Ohm/coil
3.4 Ohm/bob.

3.4 Ohm/coil
3.4 Ohm/bob.

3.4 Ohm/coil
3.4 Ohm/bob.

Le

2.47mH

5.1mH

5.1mH

Qms

14.1

10.4

10.4

Qes

0.62

0.66

0.49

Qts

0.59

0.62

0.50

Vas

0.55ft3
15.8L

1.07ft3
30.29L

2.40ft3
67.9L

Sd

35.65in2
(230cm2)

54.25in2
(350cm2)

80.6in2
(520cm2)

Power Handling (watts continuous)

180 Watts

270 Watts

360 Watts

Power Handling (watts peak)

360 Watts

540 Watts

720 Watts

Sensitivity (SPL at 1 watt / 1 meter)

85dB/series

86dB/series

88dB/series

Xmax (Linear)

0.24"
(6.1mm)

0.35"
(9.0mm)

0.35"
(9.0mm)

Voicecoil Diameter

1 1/2"
(38.1mm)

2"
(50.8mm)

2"
(50.8mm)

Mounting Depth Top Mount

4"
(100mm)

5 1/2"
(138.9mm)

6"
(152.4mm)

Mounting Depth Bottom Mount

4 9/16"
(115.8mm)

6 1/4"
(158.2mm)

6 3/4"
(171.4mm)

Mounting Diameter

7 1/16"
(179.4mm)

9 1/16"
(230.2mm)

11"
(279.4mm)

POLK AUDIO

SUBWOOFERS SYSTEM



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Title                           : Polk Audio Subwoofers System Manual
Description                     : Polk Audio Subwoofers System Manual
Keywords                        : subwoofers, subs, dual subwoofers, performance subwoofers, powerful subwoofers, subwoofer system, subwoofer kits, subwoofer components, 12 inch subwoofer, 15 inch subwoofer, 10 inch subwoofer, shallow subwoofer, woofers
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Subject                         : Polk Audio Subwoofers System Manual

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