Denon DN-780R
A dual-well, auto-reverse stereo cassette deck with professional connectivity and Dolby + HX Pro noise reduction
Overview
The Denon DN-780R is a double cassette deck designed for stereo recording and playback, featuring a dual-well auto-reverse tape transport system. It supports 4-track, 2-channel stereo operation with independent control over each cassette well. Marketed as a "Twin Output Auto-Reverse Cassette Deck Recorder," it includes professional-grade features such as RS-232C and parallel D-sub control ports, making it suitable for automated or studio use. The unit is noted for its Quick Auto Reverse function and dual playback/recording capability.
Specifications
| Track System | 4-track, 2-channel stereo auto reverse dual cassette |
| Type | Auto reverse, double compact cassette deck |
| Heads | Record & Playback: Hard Permalloy x2 (Revolving Head) Erase: Dual-Gap Ferrite x2 |
| Noise Reduction | Dolby noise reduction, HX Pro headroom extension |
| Connectivity | Serial D-sub 9 port (RS-232C), Parallel D-sub 25 port (dry contact), Stereo microphone input, Independent A and B Audio Outputs |
| Mechanical Features | Quick Auto Reverse |
| Number of Heads | 2 (per well) |
Design
The DN-780R uses a dual-well, auto-reverse tape transport system with independent recording and playback heads per well, allowing simultaneous operation. The head assembly includes hard permalloy record and playback heads with dual-gap ferrite erase heads. Its design incorporates professional control interfaces, including RS-232C and dry contact parallel ports, indicating integration potential with external automation systems.
Market
The DN-780R has appeared in secondhand markets such as eBay, Gumtree, and Reddit, often sold as fully serviced with new belts. One user reported acquiring a nearly unused unit for $50. Listings note it as a "Professional Cassette Deck" under pro audio equipment. A known issue is partial failure, with at least one listing specifying "Only Work Left Side," suggesting potential mechanical or electrical degradation in one transport mechanism over time.
eBay Listings
As an eBay Partner, we earn from qualifying purchases. This helps support our independent vintage technology research.