An AIWA XK-S9000 cassette recorder described by Audio magazine as possibly the perfomance culmination of the tape format.Frontloading 3-Head Stereo Cassette Deck with Dolby B + C, Dolby S, MPX Filter, Dolby HX Pro and Metal Tape Capability.Digital Peak-Reading Meters, Peak Hold.SAMTS Net weight is 14 Kgs. It has a built in D/A converter which is 18 bit This is a 3 head 4 motor deck.The Aiwa Xk-S9000 was known as the last best deck ever made. The frequency response on this deck is rated with metal tapes to be 13HZ to 24Khz. Signal to noise with Dolby S is rated to 87db. And yes I love Dolby S. Much improved over Dolby C. excellent dynamics and the sound is warm with excellent low end and crisp highs. The low end is better on this deck then any other I've heard to date. Other decks just don't have it in the lows compared to this Aiwa. This deck has a rich sound with excellent depth to the notes..