Jensen JPW412, JPW410 User Manual

JPW412 JPW410

Installation and Owners Manual Guide d’installation et d’utilisation

Manual del usuario y de instalación

Box Guidelines

Jensen recommends that you have your subwoofers professionally installed. If choosing to do your own installation, please note the following:

• Make sure all moving parts and factory electrical wires are cleared.

• Leave slack in the wire to prevent pulling or stretching.

• Tie down wires to prevent them from getting caught or shorted.

• Do not mount subwoofers where they might be subjected to moisture.

• Correct subwoofer polarity must be used. The polarity positive side is marked by a (+) sign or red dot. Subwoofers out-of-phase will have little bass output.

Box Calculations

During construction, temporarily assemble the wood making sure all pieces line up. Assemble the box before cutting the holes for the subwoofers. After the box is assembled, connect an amplifier to the subwoofer, and listen for whistling noises and buzzes. If the box will be

• Speaker frames will be twisted by installation on uneven surfaces. This occurs when the surface is carpeted/padded and screws are over-tightened.

• If using more than one subwoofers, be sure that the combined impedance values cannot damage the amplifier.

• Speaker wire should be isolated from the vehicleís electrical system to avoid noise being picked up by the amplifiers.

• Speaker wire should be large enough to carry the full power of the amplifier. 14 gauge or larger sizes are adequate.

• Be sure to give your ears a break if you listen loud. Listening loud for extended periods can damage your hearing!

JPW Series

mounted in a vehicle, it should be fastened securely. "L" shaped brackets work adequately.

Simple Math

To build a box, some math calculations must be made using the formulas below.

Calculations

Shape Area Volume:

Circle (opening) A = 0.79 x D x D N/A

Cylinder (port) N/A V = 0.79 x D x D x H

Rectangle A = H x W N/A

Rectangular Box N/A V = H x W X D

Triangle A = 0.5 x H x W N/A

Triangular Box N/A V = 0.5 x H x W x D

Areas

Subwoofer box calculations will need math conversions to make the numbers easier to work with. Use the conversions listed.

Math Conversions

Converting From: Multiply By: To Find:

Inches 0.0254 Meters

Square Inches 0.007 Square Feet

Cubic Inches 0.00058 Cubic Feet

Square Feet 144 Square Inches

Cubic Feet 1728 Cubic Inches

Cubic Feet 28.3 Liters

Meters 39.37 Inches

Liters 0.035 Cubic Feet

TOLL-FREE INSTALLATION ASSISTANCE The installation and wiring connections for this unit are so simple, we doubt you'll need our help, but, if you do, we're here to help you. Just call our toll-free telephone assistance line at 1-800-323-4815 during the days and hours shown (U.S.A. and Canada only) Hours: 8:30AM - 7:00PM EST Monday - Friday 9:00AM - 5:00PM EST Saturday

Volumes

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