User manual INFINITY REFERENCE 850W 1050W 1052W 1250W 1252W

[. . . ] Although these instructions explain how to install a Reference Series subwoofer in a general sense, they do not show box-construction details or exact installation methods for your particular vehicle. If you do not feel you have the necessary experience, do not attempt the installation yourself, but instead ask your authorized Infinity dealer about professional installation options. Remember to keep your sales receipt with this manual in a safe place so both are available for future reference. WARNING: Playing loud music in an automobile can permanently damage your hearing, as well as hinder your ability to hear traffic. [. . . ] Vented enclosures provide better efficiency in the 40Hz ­ 50Hz range but this efficiency comes at the expense of sound in the lowest octave (below 40Hz) and at the expense of some control and power handling. If you are using a small amplifier, a vented box will provide more bass output from less power. Vented enclosures are also well suited to a variety of music types. Because vented enclosures require the volume of the enclosure and the size of the port to have a specific relationship with the characteristics of the woofer, the enclosure must be built exactly to the specifications provided. While there are some prefabricated vented boxes available, matching a prefabricated box to a particular woofer is difficult. If you wish to use a vented enclosure, we strongly recommend having your authorized Infinity dealer build it or verify that your design is correct if you wish to build it yourself. An optimum vented enclosure is always larger than the optimum sealed box for the same woofer and will require more space inside the vehicle. Bandpass enclosures often provide the most output available from any amplifier and subwoofer combination at the expense of sonic accuracy. If sheer SPL (sound-pressure level) is what you desire most, choose a bandpass enclosure. Bandpass-enclosure design is very tricky and the aid of a computer and enclosure design software is necessary. If you are an experienced installer or have some woodworking experience, you may wish to build the enclosure described in the enclosure design sheet included with this woofer. Fortunately, there are many prefabricated bandpass boxes available and they are all optimized to extract the most output possible from any woofer. Bandpass enclosures can be quite large and may require a lot of space inside your vehicle. POWER HANDLING LIMITATIONS The power handling capability of any woofer is related to both its ability to dissipate heat and the maximum excursion limits of its cone. Once the speaker's voice coil moves outside the magnetic gap, power can no longer be converted into motion and all the amplifier's power is converted into heat in the voice coil. This voice coil heating is the largest detriment to speaker longevity, so overexcursion should be avoided. Since speakercone excursion is different for each type of enclosure, power handling is different for each enclosure. Sealed enclosures exert the most control over the motion of a subwoofer because the air inside the box acts like a spring against the motion of the woofer cone. Larger boxes allow for more excursion, thus providing more low-frequency output for the amount of power used. When placed in a sealed box much larger than the Vas of the subwoofer, it will perform as if it were in an infinite-baffle installation. Vented and bandpass enclosures have the lowest amount of excursion for the amount of sound output. [. . . ] As long as the recommended enclosure parameters are used, the subwoofer will perform properly in its enclosed environment. However, any design deviation may result in less than optimum performance, and may also subject the subwoofer to overexcursion (i. e. , where the voice coil leaves the gap) that can eventually damage the speaker. For additional help with this issue, please contact your authorized Infinity dealer. reference series SPECIFICATIONS Diameter: Sensitivity @ 2. 83V/1m: Power Handling (RMS): Power Handling (Peak): Frequency Response: Impedance: Voice-Coil Diameter: Mounting Depth: Overall Diameter: Cutout Diameter: 850w 8" (200mm) 91dB 200W 800W 30Hz ­ 400Hz 4 ohms 2" (51mm) 4-5/16" (110mm) 8-1/4" (210mm) 7-1/16" (179mm) 1050w 10" (250mm) 91dB 250W 1000W 25Hz ­ 400Hz 4 ohms 2" (51mm) 4-9/16" (116mm) 10-3/8" (264mm) 9-1/8" (232mm) 1052w 10" (250mm) 91dB 250W 1000W 25Hz ­ 400Hz 2 or 8 ohms 2" (51mm) 4-9/16" (116mm) 10-3/8" (264mm) 9-1/8" (232mm) 1250w 12" (300mm) 93dB 300W 1200W 23Hz ­ 400Hz 4 ohms 2" (51mm) 5-1/16" (129mm) 12-7/16" (316mm) 11-3/16" (284mm) 1252w 12" (300mm) 93dB 300W 1200W 23Hz ­ 400Hz 2 or 8 ohms 2" (51mm) 5-1/16" (129mm) 12-7/16" (316mm) 11-3/16" (284mm) A valid serial number is required for warranty coverage. Features, specifications and appearance are subject to change without notice. [. . . ]