HEATKEYS

Provides bandpass, sealed and vented subwoofer box design software and science, math and engineering programs and freeware

Yahoo! Answers is a new way to find and share information. You can ask questions on any topic, get answers from real people, and share your insights and experience.

YouTube is a place to discover, watch, upload and share videos.

The Leader in guitar speakers, bass speakers, and pro audio loudspeakers. Great upgrades for JBL, Celestion, Jensen, and Fane.

Car audio technical information with more than 125 individual pages, 50+ calculators and wav files. The covered topics range from basic electronics theory to more advanced topics such as speaker impedance as it relates to frequency, damping factor a...

The Subwoofer Design Toolbox by MFR Engineering is an easy to use but powerful program for designing subwoofers. The Car Stereo Cookbook explains how to design, choose and install car stereo systems.

DIY Audio and Video: FAQs, Tutorials, and Calculators for Speaker Boxes, Crossovers, Filters, Wiring and more.

The online community for car audio beginners, enthusiasts and professionals. Find, compare and review the hottest car audio components, installers and installation shops in the world. Buy or sell your car stereo gear in our free online classifieds, s...

Atrend is the global leader in subwoofer enclosures. Our speaker boxes are manufactured by our staff of experienced audio professionals. We bring the boom so you don