17
More Info @ www.polkaudio.com/car
ENGLISH
SUBWOOFER SPECIFICATIONS
db840 db1040 db1240
Thiele/Small Parameters
Type subwoofer subwoofer subwoofer
Driver Size 8" 10" 12"
(203.2mm) (254mm) (304.8mm)
Nominal Impedance 4 Ohm 4 Ohm 4Ohm
Frequency Response 30-200Hz 28-200Hz 27-200Hz
Fs (Hz) 42Hz 35Hz 30Hz
Re 3.5 Ohm 3.5 Ohm 3.5Ohm
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 0.54ft
3
0.99ft
3
2.54ft
3
(15.4L) (28.3L) (71.85L)
Sd 35.65in
2
54.25in
2
80.6in
2
(230cm
2
) (350cm
2
)(520cm
2
)
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" 0.3" 0.3"
(6.1mm) (7.5mm) (7.5mm)
Voicecoil Diameter 1 1/2" 2" 2"
(38.1mm) (50.8mm) (50.8mm)
Mounting Depth Top Mount 4" 5 1/2" 6"
(100mm) (138.9mm) (152.4mm)
Mounting Depth Bottom Mount 4 9/16" 6 1/4" 6 3/4"
(115.8mm) (158.2mm) (171.4mm)
Mounting Diameter 7 1/16" 9 1/16" 11"
(179.4mm) (230.2mm) (279.4mm)
WARNING: LISTEN CAREFULLY
Polk Audioloudspeakers andsubwoofers arecapable ofplaying atextremely high volumelevels, which
could causeserious orpermanent hearingdamage. PolkAudio, Inc.accepts no liabilityfor hearingloss,
bodily injuryor propertydamage resultingfrom themisuse ofits products.
Keep theseguidelines inmind andalways useyour owngood judgment whencontrolling volume:
• You shouldlimit prolongedexposure tovolumes thatexceed 85decibels(dB).
• High volumein anautomobile canhinder yourability tosafely operatea vehicle.
• You areresponsible forknowing thelocal lawsgoverning acceptablemobile volume levels.
For moreabout safevolume levels,go to:www.polkaudio.com/education/article/SPL/
Or referto theOccupational Healthand SafetyAdministration (OSHA)guidelines at:
www.osha.gov/dts/osta/otm/noise/standards_more.html
