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SAFE LIMITS OF OPERATION

Polk Audio specifies the recommended amplification range for each of its passive (non-amplified) loudspeakers. Typically that specification will be expressed as a range of power such as 20-200 W (per channel). It is important to understand what those numbers mean when choosing a receiver or amplifier for your Polk loudspeakers. The lower number indicates the lowest continuous rated power that will yield acceptable performance in a typical listening environment. The higher number indicates the highest per channel power that should be used with your Polk speakers. That number should not be confused with a “Power Handling” specification and it does not imply that the speaker will safely handle that full amount of power on a long-term basis. We specify

a wide range of power ratings because not all electronics manufacturers use the same method for rating power.

In fact, high quality lower-rated amplifiers sound better and play louder than low quality units with a higher power rating.

Automobile horsepower is a good analogy. Your car probably has far more horsepower than it needs for your daily commute and is likely capable of going well over 120mph (190km/hr). Having that extra power is good for on-ramp acceleration

and danger avoidance (like getting away from brain-eating zombies) but that doesn’t mean that it is advisable to operate your car on North American highways at full power and maximum speed for an extended period of time. Just ask your local state trooper if you are in doubt. Similarly, we recommend using amplifiers and receivers with rated power above the Power Handling limits of our speakers because having extra power available for short term peaks is conducive to better sound quality, maximum dynamic range and effortless high volume output. But we strongly urge you not to use the full power of your amplifier or receiver for daily listening.

Loudspeakers can be damaged when an amplifier, regardless of its wattage, is made to play at higher listening levels than its power can clearly produce. Operation at this level can result in very high levels of audible distortion originating in the amplifier, which can add a harsh, gritty sound to your listening material. If you hear distortion—turn the volume down or risk damaging your speakers. You can damage just about any speaker, regardless of power rating, if you drive an amplifier to or beyond the point of distortion.

BRING ON THE NOIZE!

Please inspect each loudspeaker carefully. Notify your

Polk Audio dealer if you notice any damage or missing items. Keep the carton and packing material. They will do the best job of protecting your speakers if they need to be transported.

BUILDING A HOME FOR YOUR SUBWOOFER— db SUB ENCLOSURE 101

To get the best performance from your db Subwoofers, you must use a Subwoofer Enclosure. Don’t bother using them in “free air,” with no sub box, just popped into the back deck of your car. You will not get very good performance from your subwoofers if you do this.

They are not designed to be installed infinite baffle or “free air.” This will void the warranty.

You can build your own box, buy a pre-built box or a box kit, or have your Polk Audio dealer design and build a custom sub enclosure for you. Your db Subwoofers were designed to work well in a wide variety of enclosure sizes and configurations.

If you choose to build your own enclosure, be sure to build it well. Make certain it’s properly sealed and airtight for maximum bass performance.

Polk Audio Customer Service is available from 9am–6pm, EST, Monday through Friday, at 800-377-7655 (US & Can only, outside the US please call

410-358-3600) or email us at polkcs@polkaudio.com Please do not hesitate to call us if you have questions about your speaker system. We love this stuff.

RECOMMENDED SEALED ENCLOSURES

db840 & 840DVC 0.35 cu ft (9.9L) db1040 & 1040DVC 0.66 cu ft (18.7L) db1240 & 1240DVC 0.88 cu ft (24.9L)

For more information about enclosures and configurations, log on to www.polkaudio.com/car/toolbox/subboxplans/. Or call Polk Audio’s Customer Service Department for a FAXback Sub Enclosure info sheet.

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

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Polk Audio DB1040, DB1240, DB840 manual English Safe Limits of Operation, Bring on the Noize, Recommended Sealed Enclosures
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DB1040, DB840, DB1240 specifications

Polk Audio is renowned for its commitment to delivering high-quality audio experiences, and their DB series of car subwoofers is no exception. The DB1240, DB840, and DB1040 are designed to provide powerful bass performance, making them ideal for car audio enthusiasts who prioritize sound clarity and depth.

Starting with the DB1240, this 12-inch subwoofer features a peak power handling of 1200 watts and a RMS power handling of 400 watts. Its dynamic balance woofer cone is crafted from a durable polypropylene material, ensuring efficient sound reproduction with minimal distortion. The DB1240 also employs a high-temperature voice coil that enhances heat dissipation, allowing for extended playtime without compromising sound quality. The subwoofer's rubber surround contributes to its longevity, enhancing flexibility and strength while ensuring a tight seal for improved bass response.

Next up is the DB840, a compact 8-inch subwoofer designed for those with limited space but an unwavering desire for powerful bass. With a peak power handling of 800 watts and an RMS power handling of 200 watts, the DB840 doesn't compromise on performance despite its smaller size. This subwoofer uses a similar dynamic balance woofer cone technology and robust rubber surround, allowing it to produce punchy bass that is both clear and impactful. Its compact design makes it an ideal choice for smaller vehicles or applications where space is a constraint.

Finally, the DB1040 is a 10-inch subwoofer that strikes a balance between size and power. With a peak power handling capability of 1000 watts and an RMS rating of 300 watts, the DB1040 provides a deep, resonant bass tone that can fill any car interior. Like its counterparts, it features a polypropylene cone and high-temperature voice coil, ensuring reliable performance and fidelity under various conditions. The subwoofer's design also incorporates a vented pole piece to optimize airflow, which helps in maintaining performance during extended listening sessions.

All three models feature a corrosion-resistant design that helps withstand the rigors of automotive environments, making them suitable for marine applications as well. The DB series subwoofers can be used in both sealed and ported enclosures, giving users flexibility in terms of installation and tuning their bass response.

In conclusion, the Polk Audio DB1240, DB840, and DB1040 subwoofers exemplify Polk's dedication to audio quality. With their dynamic balance technology, robust power handling capabilities, and durable construction, these subwoofers are poised to elevate any car audio system, ensuring an immersive listening experience no matter the genre of music. Whether you're a casual listener or a dedicated audiophile, Polk's DB series has models that cater to a variety of preferences and requirements.
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