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SUBWOOFER SPECIFICATIONS |
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| db840 | db1040 | db1240 |
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Thiele/Small Parameters |
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Type | subwoofer | subwoofer | subwoofer |
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Driver Size | 8" | 10" | 12" |
| (203.2mm) | (254mm) | (304.8mm) |
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Nominal Impedance | 4 Ohm | 4 Ohm | 4 Ohm |
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Frequency Response | |||
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Fs (Hz) | 42Hz | 35Hz | 30Hz |
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Re | 3.5 Ohm | 3.5 Ohm | 3.5 Ohm |
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Le | 2.3mH | 3.0mH | 3.0mH |
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Qms | 13.4 | 9.1 | 10.4 |
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Qes | 0.58 | 0.59 | 0.46 |
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Qts | 0.56 | 0.55 | 0.44 |
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Vas | 0.54ft3 | 0.99ft3 | 2.54ft3 |
| (15.4L) | (28.3L) | (71.85L) |
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Sd | 35.65in2 | 54.25in2 | 80.6in2 |
| (230cm2) | (350cm2) | (520cm2) |
Power Handling (Watts continuous) | 180 Watts | 270 Watts | 360 Watts |
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Power Handling (Watts peak) | 360 Watts | 540 Watts | 720 Watts |
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Sensitivity (SPL at 1 Watt / 1 meter) | 85dB | 86dB | 88dB |
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Xmax (Linear) | 0.24" | 0.3" | 0.3" |
| (6.1mm) | (7.5mm) | (7.5mm) |
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Voicecoil Diameter | 1 1/2" | 2" | 2" |
| (38.1mm) | (50.8mm) | (50.8mm) |
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Mounting Depth Top Mount | 4" | 5 1/2" | 6" |
| (100mm) | (138.9mm) | (152.4mm) |
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Mounting Depth Bottom Mount | 4 9/16" | 6 1/4" | 6 3/4" |
| (115.8mm) | (158.2mm) | (171.4mm) |
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Mounting Diameter | 7 1/16" | 9 1/16" | 11" |
| (179.4mm) | (230.2mm) | (279.4mm) |
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WARNING: LISTEN CAREFULLY
Polk Audio loudspeakers and subwoofers are capable of playing at extremely high volume levels, which could cause serious or permanent hearing damage. Polk Audio, Inc. accepts no liability for hearing loss, bodily injury or property damage resulting from the misuse of its products.
Keep these guidelines in mind and always use your own good judgment when controlling volume:
•You should limit prolonged exposure to volumes that exceed 85 decibels(dB).
•High volume in an automobile can hinder your ability to safely operate a vehicle.
•You are responsible for knowing the local laws governing acceptable mobile volume levels. For more about safe volume levels, go to: www.polkaudio.com/education/article/SPL/
Or refer to the Occupational Health and Safety Administration (OSHA) guidelines at: www.osha.gov/dts/osta/otm/noise/standards_more.html
M o r e I n f o @ w w w . p o l k a u d i o . c o m / c a r | 17 |