The top 25 players in car electronics saw a modest 2.7 percent increase in sales during 2008, but 2009 is showing signs of a shift.

As portable GPS sales flatten, many of the big-box retailers may play a lesser role in car electronics in 2009. Conversely, the role of regional CE retailers and specialists may increase.

Some of the smaller retailers said they are renewing their focus on car stereo in response to several market conditions.