Optonica RT-6405 Stereo Cassette Deck

This Optonica RT-6405 is a stereo cassette deck with Dolby B noise reduction, it was first sold by Optonica in 1981 with a recommended retail price of USD $380 and discontinued 2 years later in 1983.

The main features of the Optonica RT-6405 are: 2 heads, mechanical 3 digit tape counter, manual tape type selection and capable of handling normal, chrome, ferro-chrome and metal tapes, belt driven single-capstan transport.

Typical front loading cassette deck with the cassette compartiment 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 RT-6405 are generic digital peak reading meters with peak hold for easy adjustment of optimum recording level.

The Dolby-B system reduces tape hiss on tapes recorded on the RT-6405 by as much as 10 dB at the highest frequencies. The 19kHz multiplex pilot slgnal present in FM stereo broadcasts can cause false triggering of the noise reduction system. The switchable MPX filter of the RT-6405 filters out the pilot signal, and assuring proper Dolby processing of FM stereo programs.

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.

• APSS (Auto Program Search System)
• DD
• 2-Motor Drive
• Microprocessor / Solenoid Control
• OPTO Peak Level Display