Internet media company Yahoo Inc. and wireless equipment maker Linksys on Thursday unveiled a new product to help consumers move digital music from computers to stereo sound systems in the home.

The Linksys Wireless-G Music Bridge is meant to complement Yahoo’s digital music download service, allowing consumers to stream music directly to a stereo from their computer for an estimated price of $99.99. Linksys is a division of networking equipment maker Cisco Systems Inc.

Streaming is done wirelessly rather than requiring additional cables to connect the stereo with a personal computer, but allows digitally downloaded music to be played on a full system of speakers.

The product represents a new step by media and technology companies competing for dominance in the home entertainment market by linking content accessed digitally via computer to more traditional vehicles such as television and stereos.

It can be used together with Yahoo’s Music Engine, which allows consumers to play and save songs, share them on an instant messaging system, or transfer them to portable devices. The Yahoo Music Engine software can be downloaded for free in conjunction with a Yahoo digital music subscription.

Yahoo and Linksys will promote the product in a marketing campaign on Internet sites, product packaging and more traditional advertising. Yahoo said it would offer a $20 rebate on the Wireless-G Music Bridge if consumers sign up for a one-year subscription to its music service.