The Hitachi HT-550 is a direct drive turntable that was manufactured between 1978 and 1980. It features a die-cast aluminum platter measuring 330 mm in diameter and weighs approximately 1.8 kg. The turntable is powered by a DC servo motor and offers two speed settings: 33 1/3 rpm and 45 rpm. It boasts a synchronization fluctuation of 0.025% (WRMS) and an external noise level of 74 dB. The head cup is insertable according to European standards, and the tracking force is adjustable from 0 to 3g, with a recommended contact force of 1.25 to 2g. The power consumption is rated at 8 watts, and the dimensions of the unit are 480 mm wide, 381 mm high, and 139 mm deep, weighing in at 10 kg. Initially priced at approximately $300 USD or 800 DM, the HT-550 represents an example of vintage audio equipment from Hitachi's extensive product line.