Denon DCD-1420 – Classic Japanese CD Player with a Complete Burr-Brown Analogue Signal Path
The Denon DCD-1420 comes from an era when a CD player was not treated as a simple accessory but designed to be one of the principal source components in a serious hi-fi system. Its substantial construction, genuine 20-bit Double Super Linear conversion, separate left- and right-channel D/A converters and carefully engineered analogue output stage still provide an impressive technical foundation.
This particular example has also been meaningfully upgraded from its original configuration. The operational amplifiers throughout the active analogue signal path following D/A conversion have been replaced with Burr-Brown devices, with the aim of achieving cleaner, more detailed and more naturally musical reproduction.
The modification does not alter the original functionality or familiar character of the DCD-1420. Instead, it builds upon the player's strong engineering foundations and is intended to extract more of the performance available from its internal converter. As a result, the Denon can serve not only as a dependable CD transport but also as a high-quality standalone analogue source in a carefully assembled audio system.
Genuine 20-Bit Double Super Linear Conversion
One of the most important features of the Denon DCD-1420 is the manufacturer's proprietary Double Super Linear Converter system. The design was developed to minimise zero-crossing distortion in PCM playback and improve the reproduction of low-level musical information.
The player employs an independent D/A converter for each channel. This dual-channel arrangement provides greater separation between the left and right signals and supports a more stable stereo image than designs in which both channels share a single converter.
The genuine 20-bit conversion system is complemented by a high-precision digital filter with eight-times oversampling. Its role is not simply to process the digital data but also to make the task of the analogue filter less demanding and improve the suppression of unwanted high-frequency components created during conversion.
This was a sophisticated solution in its day and still illustrates how seriously Denon approached the interaction between the digital conversion and analogue output stages.
Complete Burr-Brown Operational-Amplifier Upgrade
The sound quality of a CD player is not determined solely by its D/A converter. Once the digital information has been converted, the analogue stage must filter, amplify and buffer the signal before it reaches the output terminals. If this section is compromised, much of the converter's potential can be lost.
For this reason, the operational amplifiers throughout the active analogue signal path of this DCD-1420 have been replaced. Burr-Brown devices have been installed in place of the original operational amplifiers, creating a consistent upgrade across the active circuitry following D/A conversion rather than changing only one isolated component.
The purpose of this modification is to support cleaner signal transmission, clearer separation of fine details, more stable stereo imaging and a more natural tonal balance. The quality of the analogue stage can be particularly noticeable with vocals, acoustic instruments and quiet musical passages, where low-level resolution and tonal continuity are essential to an engaging presentation.
Another important advantage is that the player's internal converter and analogue outputs remain fully worthwhile in their own right. A separate external DAC is therefore not immediately required for the DCD-1420 to perform convincingly in a serious audio system.
Substantial Mechanism and Stable Disc Reading
The DCD-1420 is very different from a lightweight, simplified CD player. Its approximately 6.3-kilogram chassis provides a stable mechanical environment for the transport, power supply and sensitive audio circuitry.
Mechanical stability remains important in a CD player. Disc rotation, laser-pickup movement and vibrations entering from the surrounding equipment support can all affect the conditions under which the disc is read. A rigid enclosure and carefully constructed mechanism help provide a calmer operating environment for the optical system.
The centrally positioned disc drawer, large display and directly accessible controls reflect Denon's classic design language. Alongside play, pause, stop and track-search functions, the player provides direct numerical track selection, programmed and random playback, together with several repeat modes.
The mechanism can also play 8-centimetre CD singles without requiring a separate adaptor.
Suitable for Both Analogue and Digital Systems
The rear panel provides both fixed-level and variable-level analogue RCA outputs. The fixed output can be connected conventionally to an integrated amplifier or preamplifier, while the level of the variable output can be adjusted from the front panel or with the remote control.
An adjustable headphone socket is also provided on the front panel, allowing the player to be used for private listening without requiring a separate headphone amplifier. This can be particularly useful for evening listening or in a compact secondary system.
The DCD-1420 is also equipped with coaxial and optical digital outputs. It can therefore be used as a dedicated CD transport with an external D/A converter, while retaining the option of using its internal converter and upgraded Burr-Brown analogue circuitry.
This dual capability makes the player flexible over the long term. Its own analogue outputs provide a complete and musically capable source, while the digital outputs allow it to remain useful if an external DAC is added during a future system upgrade.
Thoughtful and Comprehensive Operation
Using the corresponding remote control, the principal playback functions can be operated from the listening position. The remote also controls the level of the variable line output and headphone output.
Programmed playback allows tracks to be arranged in a preferred order, while the Random function plays the contents of a disc in a shuffled sequence. Repeat modes are available for a single track, the entire disc or a specifically selected A–B section.
The Auto Edit function was originally developed to simplify recording CDs onto cassette. It automatically divides the tracks into two groups of approximately equal playing time. Although this is now primarily an interesting period feature, it demonstrates how comprehensively the DCD-1420 was equipped.
Key Features
Classic Japanese stereo CD player
Denon Real 20-bit Double Super Linear Converter
Independent D/A converter for each channel
High-precision digital filter with eight-times oversampling
Upgraded analogue output stage
Burr-Brown operational amplifiers throughout the active analogue signal path
Fixed-level stereo RCA output
Variable-level stereo RCA output
Coaxial digital output
Optical digital output
Adjustable front-panel headphone socket
Direct numerical track selection
Programmed playback
Random playback
Single-track, full-disc and A–B repeat modes
Auto Edit and Auto Space functions
Playback of 8-centimetre CD singles without an adaptor
Remote-control capability
Approximate dimensions: 434 × 135 × 310 mm
Approximate weight: 6.3 kilograms
Who Is It For?
The Denon DCD-1420 is an excellent choice for anyone wishing to enjoy an established CD collection through a substantially constructed classic Japanese player. It will be particularly appealing to listeners who appreciate the solid engineering, logical operation and comprehensive connectivity of Denon's traditional full-size components.
The complete active analogue signal path fitted with Burr-Brown operational amplifiers also makes this example especially interesting for listeners who intend to use it as more than a CD transport. The purpose of the upgrade is to allow the internal Double Super Linear conversion system to deliver more of its potential through the player's own analogue outputs.
Its coaxial and optical digital connections also make it possible to add an external DAC at a later stage, allowing the player to remain useful as the rest of the system develops. It can operate as a conventional standalone CD player, a private headphone source or a solid transport within a modern digital setup.
In this upgraded configuration, the Denon DCD-1420 is more than simply a preserved vintage CD player. It is a thoughtfully enhanced digital source that combines Denon's classic mechanical and converter architecture with a consistent Burr-Brown analogue signal path—for listeners who still expect genuinely musical and rewarding performance from the Compact Disc format.
