Hagens Berman today announced it is expanding its investigation of Best Buy’s (NYSE: BBY) Insignia-brand car speakers after its initial investigation showed that other models of speakers advertised as three- and four-way models may contain fewer speaker components or false, non-operable components concealed beneath speaker covers.

Hagens Berman is evaluating all models of Best Buy’s Insignia three- and four-way speakers purchased between 2007 and the present. Consumers who purchased speakers during that period are encouraged to contact the firm. Consumers can reach an attorney by calling (206) 623-7292 or by emailing BestBuyInsignia@hbsslaw.com.

The firm currently believes that false components can be found in the following models: NS-S5250, a set of two 5.25 inch, 60-watt, three-way car stereo speakers; NS-S6000, a set of two 6.5 inch, 70-watt, three-way car stereo speakers; and NS-S6900, a set of two 6 inch by 9 inch, 90-watt, four-way car stereo speakers.

The firm filed a class-action lawsuit on behalf of consumers on July 16, 2010, in the United States District Court for the District of Arizona. The case alleges that Best Buy sold Insignia-brand car speakers that were advertised as three-way models but were in fact two-way models.

In three-way speakers, the sound is “split” in three ways with three drivers resulting in better sound than two-way speakers, according to the lawsuit.

The complaint alleges that fake plastic components were placed in the speakers to give the illusion of a third driver, usually the high-range speaker commonly referred to as a microtweeter.

Hagens Berman’s lawsuit alleges that the inclusion of the fake component and Best Buy’s advertising would place it in violation of the Racketeer Influenced and Corrupt Organizations Act (RICO).

Best Buy recently asked the court to dismiss the case before a trial could begin. However, according to United States District Judge Mary H. Murguia the “plaintiff adequately alleges a pattern of racketeering activity in the form of mail and wire fraud.” She denied Best Buy’s request and ordered that the case move forward.

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