This Yamaha K-720 is a auto-reverse stereo cassette deck with Dolby B/C and HX-Pro and DBX noise reduction, it was first sold by Yamaha in 1985 and discontinued 3 years later in 1988. The main features of the Yamaha K-720 are: 2 heads, digital linear tape counter with 3 digits, automatic tape type selection and capable of handling normal, chrome and metal tapes, belt driven auto reverse transport.
Typical front loading cassette deck with the cassette compartment located on the left side of the deck. Tape eject is operated mechanically and the cassette needs to be placed with the side to be played facing forward in the cassette well.
Level meters used on the K-720 are generic digital peak reading meters. Full-logic transport controls used on the K-720 let it respond to the slightest finger contact for fast and effortless transport function selection.
Dolby C-type used in the K-720 provides 20 dB of noise reduction above about 1,000 Hz, fully doubling the amount given by B-type. The Dolby HX PRO system provides precise bias control during recording to reduce distortion and improve linearity in the high-frequency range, the result is recorded sound that is highly faithful to the original. Dbx Type II found in the K-720 is a simplified version of the Type I noise reduction system. The dbx Type II system was designed to be used with systems with limited bandwidth such as cassette based recorders and also uses a simple 2:1:2 compander to reduce noise.
To make live recordings this deck has 2 microphone inputs to connect microphones with a jack connector. For undisturbed listening a jack connector for a pair of stereo headphones is supplied. Connection to other audio components for plaback can be achieved by a RCA cable and recording from a source by a RCA cable. All main transport commands can be issued remotely with a wired remote control.