Infinity 100.1SE, 120.1SE, 80.1W, 120.1DVC, 100.1DVC manual FEW Words about Enclosures

WARNING: Playing loud music in an automotive environment can permanently damage your hear- ing, as well as hinder your ability to hear traffic.

YOUR CAR AND BASS REPRODUCTION

ENCLOSURE CALCULATIONS AND BUILDING BOXES

The maximum volume levels achievable with Infinity speakers, combined with high power amplification, may exceed safe levels for extended listening. We recommend using low volume levels when driving. Infinity accepts no liability for hear- ing loss, bodily injury, or property damage as a result of use or misuse of this product.

A FEW WORDS ABOUT ENCLOSURES

Your Kappa Series subwoofer requires an enclosure to realize its full low-frequency response.The speaker’s design is flexible enough to produce exceptional results whether you speci- fy a small sealed, vented or bandpass enclosure. In vented and bandpass enclosures, box size and port-tuning frequency will also help dictate the low-frequency performance and output capability of your system.

Your Kappa Series subwoofer will also work in infinite-baffle applications where there is no space or budget to build a box. Be aware that infinite- baffle or “free-air” mounting will reduce the power handling of any subwoofer compared to an application using an enclosure.

Finally, any deviation from recommended

enclosure volumes or port dimensions should be made using dedicated enclosure-design software. If this type of software is not available to you, ask your authorized Infinity dealer for help.

Depending on the size of the vehicle’s interior listening space, reproduced bass frequencies below 80Hz are boosted by nearly 12dB per octave in the car as frequency decreases. NOTE: This effect, known as the vehicle’s transfer func- tion, plays an important part in shaping the over- all in-car response and is displayed graphically along with freespace response on the enclosed data sheet for your Kappa subwoofer.

Use the recommended box designs on the enclosed data sheet. Choose cabinet dimensions to fit your vehicle, but do not change the enclo- sure’s volume. Doing so will change the tuning frequency of the enclosure and may adversely affect final performance. If you cannot perform the necessary calculations yourself, please con- tact your authorized Infinity dealer for help.

In addition, there are a number of points you’ll want to keep in mind as you construct an enclosure:

1.Use 3/4" (19 mm) MDF (medium-density fiber- board) or marine birch wood to build an enclo- sure. Enclosures for 12" and larger subwoofers, or small subwoofers driven by high-power ampli- fiers, should be constructed using 1" (26mm) material.

2.Seal all joints with glue and screws; do not use nails. We recommend “deck,” “zip” or drywall screws since they have coarse threads for better grip and don’t require pre-drilling holes. Once the box has been tested, seal all interior joints with silicone caulk.

3.Depending on the application, fill the enclosure according to the design you have chosen from the enclosed data sheet in one of three ways: zero-percent fill (i.e., no fill), 50-percent fill (i.e., 1"-thick polyfill sheets on all inside walls except where subwoofer is mounted), or 100-percent fill (i.e., entire box is stuffed with loosely packed polyester fiberfill).

4.Use PVC or ABS pipe for ports. Keep in mind that the openings at either end of the port must be at least one port diameter away from any obstructions, including filling material inside the

box. Rectangular vents can be used as long as the cross-section surface area matches the recommended port-area values in the enclosed data sheet.

5.When using vented boxes, we recommend using a subsonic filter (like the DBO feature found on Kappa Series power amplifiers) to limit the power sent to the speaker at frequencies below the enclosure’s port-tuning frequency,

thus limiting the speaker’s excursion.