Altec Lansing today introduced a new inMotion model called the iM4 that works with any brand of MP3 or CD player, unlike the company’s iPod-specific models. The inMotion iM4 is a one-piece portable system with two speakers on either side of a 4.5” x 5” no-skid rubberized platform that holds a player of any size in place. The iM4 features a 4-watt Class D digital amplifier that powers four 1” neodymium micro drivers for “clear reproduction over the entire frequency range,” while Altec’s MaxxBass technology creates quality bass without a subwoofer. The iM4 can run on 4AA batteries or AC power. It will ship in February for $129.95.