Kenwood KX-520-MKII (1983)

Name: Kenwood KX-520-MKII
Brand: Kenwood

The Kenwood KX-520-MKII is a dual cassette deck that emerged during the golden era of analog audio, representing Kenwood’s commitment to precision, durability, and high fidelity in cassette reproduction and duplication. Released in 1983, the KX-520-MKII was designed for audiophiles and home recording enthusiasts who demanded accurate tape duplication, excellent sound quality, and reliable mechanical performance. As a successor to earlier models in the KX series, the MKII version introduced refinements in transport design, electronics, and user interface, making it a standout in Kenwood’s lineup of cassette decks.

Design and Build Quality

The KX-520-MKII features a sleek, minimalist front panel typical of early 1980s Japanese audio equipment. Constructed with a rigid steel chassis and a brushed aluminum faceplate, the unit exudes durability and attention to engineering detail. The dual cassette bays are horizontally aligned, allowing simultaneous playback and recording or high-speed duplication between tapes. Each deck operates independently, with dedicated transport controls and status indicators, enabling flexible operation modes.

One of the most notable aspects of the KX-520-MKII is its mechanical transport system. It employs a direct-drive capstan mechanism for both decks, ensuring stable tape speed and reduced wow and flutter. The use of rubber pinch rollers and precision-guided tape paths helps minimize tape wear and ensures consistent head-to-tape contact. The cassette loading mechanism is manual, requiring users to insert tapes by hand, which enhances reliability compared to auto-eject or motorized loading systems that were prone to mechanical failure.

Audio Performance and Recording Features

The KX-520-MKII supports all standard tape types: Type I (ferric), Type II (chrome), and Type IV (metal), with dedicated switches for each. This allows users to optimize bias and equalization settings for the specific tape formulation, a crucial factor in achieving high-fidelity recordings. The deck features a three-head configuration—separate record, playback, and erase heads—enabling real-time monitoring of recordings with zero latency.

Frequency response is impressive for a cassette deck of its era:

Type I tape: 40 Hz – 14,000 Hz
Type II tape: 30 Hz – 16,000 Hz
Type IV tape: 30 Hz – 18,000 Hz

Signal-to-noise ratio reaches up to 66 dB with Dolby B noise reduction engaged, and dynamic range exceeds 50 dB, placing the KX-520-MKII among the upper tier of consumer cassette decks. Total harmonic distortion is kept below 1.5%, ensuring clean audio reproduction.

Dolby B noise reduction is standard on both decks, helping to suppress high-frequency tape hiss without introducing audible artifacts. Some later versions may also include optional Dolby C circuitry, though this is not universally confirmed across all production units. The presence of a dedicated calibration tape input allows users to align record levels and bias for optimal performance, a feature appreciated by serious tape enthusiasts.

Duplication and Operational Flexibility

As a dual-deck unit, the KX-520-MKII excels at tape duplication. It supports high-speed copying at 2x, 4x, or even 6x normal playback speed, depending on tape quality and deck condition. The duplication process can be initiated from either deck, with selectable source and record sides. A dedicated “Copy” button simplifies the process, automatically engaging both transports with synchronized start and stop functions.

Each deck includes full manual controls: Play, Record, Pause, Stop, Rewind, and Fast Forward. Individual level meters with dual VU displays provide real-time monitoring of audio levels during recording or playback. The meters are backlit for visibility in low-light environments, and their calibration ensures accurate level representation.

The unit also features a “Memo” function, allowing users to set in and out points on a source tape for automated copying of specific segments. This was particularly useful for creating custom mix tapes or archiving vinyl records selectively.

Technical Specifications

Tape Speed: 4.76 cm/s (1⅞ ips)
Heads: Three per deck (Record, Playback, Erase), ferrite core
Wow and Flutter: Less than 0.08% (WRMS)
Signal-to-Noise Ratio: Up to 66 dB (Dolby B on)
Frequency Response:
Type I: 40 Hz – 14 kHz
Type II: 30 Hz – 16 kHz
Type IV: 30 Hz – 18 kHz
Total Harmonic Distortion: <1.5%
Input Level: 50 mV (line), 0.2 mV (mic)
Output Level: 150 mV (line)
Headroom: +3 dB
Power Supply: AC 120V, 60Hz (varies by region)
Power Consumption: 22 watts
Dimensions: 430 mm (W) × 140 mm (H) × 330 mm (D)
Weight: 9.8 kg (approx. 21.6 lbs)

Connectivity and Integration

The rear panel includes a comprehensive set of RCA jacks for line-level input and output, as well as a 3.5mm mini-jack for microphone input (useful for voice commentary or field recordings). A dedicated calibration tape input allows for precise level setting using reference tapes. There is also a remote control input, though Kenwood did not widely release a compatible remote for this model.

The KX-520-MKII integrates seamlessly into a stereo system, pairing well with Kenwood receivers, amplifiers, and turntables of the era. Its line-level outputs can feed into any standard audio input, and its inputs can accept signals from turntables (with preamp), CD players, or tuners for recording.

Legacy and Collector Appeal

While cassette technology has long been superseded by digital formats, the Kenwood KX-520-MKII remains a sought-after unit among vintage audio collectors and analog enthusiasts. Its reputation for mechanical reliability, accurate duplication, and warm analog sound makes it a favorite for those preserving or creating cassette-based content. The ability to calibrate tape settings manually appeals to purists who value hands-on control over the recording process.

In today’s market, working units in good condition can command premium prices, especially if they have been professionally cleaned, demagnetized, and aligned. Replacement belts and head cleaning are common maintenance tasks, as with most cassette decks of this age. However, the KX-520-MKII’s robust construction means that with proper care, it can continue to perform reliably for decades.

Conclusion

The Kenwood KX-520-MKII is more than just a relic of the 1980s—it’s a testament to the engineering excellence of Japan’s analog audio heyday. Its combination of dual-deck functionality, high-fidelity playback, and professional-grade recording features made it a top choice for home audiophiles and tape archivists. Whether used for duplicating rare recordings, transferring vinyl to tape, or simply enjoying the warmth of analog sound, the KX-520-MKII stands as a durable and capable machine. For collectors and vintage audio lovers, it remains a prized component in any analog setup, embodying the precision and craftsmanship that defined an era of passionate sound reproduction.