POWER-HANDLING LIMITATIONS

SPECIFICATIONS

The power-handling capability of any woofer is related to both its ability to dissi- pate heat and the maximum excursion lim- its 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 longevi- ty, so overexcursion should be avoided. Since speaker-cone 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 larger than the Vas of the subwoofer, it will perform as if it were in an infinite baffle installation.

Vented enclosures have the lowest amount of excursion for the amount of sound output. This is a result of port output reinforcing the sound output from the woofer. The mass of the air contained in the port provides an acoustic load on the woofer’s cone at the tuning frequency, and this added mass decreases woofer-cone excursion. Vented boxes do not provide adequate woofer control when driven below the port tuning range, so proper design is important. A vented bandpass box will have the lowest overall cone excursion, provided a subsonic filter is used.

•Voice-coil overheating and burning due to overexcursion are often caused by over- driving an amplifier into "clipping." A severely clipped signal, or squarewave, contains nearly twice the power of a clean sine wave at the same level. Bass that sounds broken up and distorted at higher volumes usually indicates that the amplifier is clipping (i.e., being asked to deliver power beyond its rated power).

•Infinite baffle or “free air” mounting applications allow for greater cone excur- sion than subwoofers mounted in an enclo- sure. In order to compensate, recognize that the power-rating value of the sub- woofer will likely be half its rated power in this application.

•Study the excursion curves on the enclosed Reference series data sheet and note the differences for different enclosure applications. The type and size of box used will produce different excursion demands on the enclosed subwoofer and, conse- quently, different levels of power handling. As long as recommended 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 sub- ject 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 con- tact your authorized Infinity dealer.

Reference 811w

 

Configuration:

8" woofer

Nominal Impedance:

4 ohms

Power Handling:

200W

Sensitivity @ 2.83V/1m:

91dB

Frequency Response:

50Hz – 1kHz

Mounting Depth:

4-3/8" (112mm)

Cut-out Diameter:

7-1/8" (181mm)

Reference 1011w

 

Configuration:

10" subwoofer

Nominal Impedance:

4 ohms

Power Handling:

225W

Sensitivity @ 2.83V/1m:

92dB

Frequency Response:

40Hz – 500Hz

Mounting Depth:

4-5/8" (118mm)

Cut-out Diameter:

9-1/8" (232mm)

Reference 1211w

 

Configuration:

12" subwoofer

Nominal Impedance:

4 ohms

Power Handling:

250W

Sensitivity @ 2.83V/1m:

93dB

Frequency Response:

30Hz – 500Hz

Mounting Depth:

5" (127mm)

Cut-out Diameter:

12-1/8" (308mm)

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Infinity 811w, 1211w, 1011w manual POWER-HANDLING Limitations
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811w, 1011w, 1211w specifications

Infinity 1211w, 1011w, and 811w represent a powerful trio in the realm of wireless technology, designed to elevate the user experience through exceptional performance and innovative features. These devices are the perfect solution for those seeking robust connectivity and efficiency in their daily tasks, whether at home, in the office, or on-the-go.

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In summary, the Infinity 1211w, 1011w, and 811w embody the future of wireless technology, offering high-speed connectivity, expansive coverage, stringent security measures, and easy compatibility with smart devices. Whether you are a tech enthusiast, a remote worker, or a family relying on steady internet access, these models cater to the diverse needs of modern users, making them a top choice for anyone looking to enhance their digital lifestyle.
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