Onkyo Radian-01X (1988) | Midi Component System Review

The Onkyo Radian 01X represents one of the most ambitious Japanese mini component systems of the late 1980s, blending powerful amplification with advanced digital-ready features. Designed during the transition from analog to digital audio, the Radian 01X combined CD, cassette, tuner, and DAT compatibility into a sophisticated all-in-one hi-fi package that still attracts vintage audio collectors today.

With its signature Gentle Power 200W amplifier, optical transmission CD player, and impressive 27cm three-way speakers, the Onkyo Radian 01X remains a fascinating example of Japan's golden age of compact stereo systems.

Specifications

Amplifier Output: 100W + 100W (200W maximum practical output, EIAJ)

Amplifier THD: 0.08% (1kHz)

Signal-to-Noise Ratio: 88dB (Line Inputs), 78dB (Phono)

Source Direct Mode for the shortest signal path

5-Band Graphic Equalizer

Large Dual Analog Power Meters

Gold-plated Headphone Output

DAT Input Compatibility

FM/AM/TV Tuner

24 Station Memory

Double Reverse Cassette Deck

Super Dubbing Function

Dolby B Noise Reduction

AALC Automatic Recording Level Control

Auto Tape Selector

CD Synchronized Recording

Optical Transmission CD Player

16-Track Random Program Memory

CD Single Compatible

3-Way Sealed Speaker System

27cm High Crystal Delta Olefin Woofer

7cm Midrange Driver

1.6cm Ceramic Tweeter

Speaker Frequency Response: 36Hz–20kHz

Speaker Sensitivity: 91dB/W/m

Maximum Speaker Input: 150W

Gentle Power 200W Technology

Original sale price in Japan: 170.800 Yen

At the heart of the Onkyo Radian 01X is its famous Gentle Power 200W amplifier. While rated at 100 watts per channel (EIAJ), Onkyo emphasized not brute force but effortless musical reproduction with generous dynamic headroom. The amplifier was engineered to handle the increasing dynamic range of digital media such as Compact Disc and the then-emerging Digital Audio Tape (DAT) format. Rather than sounding aggressive, the design focused on maintaining smooth, controlled power across all listening levels. One of its standout features is the Source Direct circuit. By bypassing unnecessary tone-control stages, the signal travels directly to the power amplifier, reducing interference and preserving clarity when listening to high-quality digital sources. The oversized dual power meters further reinforce the amplifier's character, providing a striking visual indication of output levels while becoming one of the system's most recognizable design elements. Optical Transmission CD Player. Unlike many contemporary CD players, the Radian 01X incorporated Onkyo's proprietary Optical Transmission technology. This design minimized electrical interference between digital and analog circuitry, helping produce cleaner bass, smoother midrange performance, and exceptionally transparent treble.

Final Thoughts

For its era, these specifications placed the player among the better-performing integrated CD mechanisms available in compact systems. The Onkyo Radian 01X perfectly captures the optimism of Japan's late-1980s hi-fi engineering. Its powerful Gentle Power 200W amplifier, optical transmission CD technology, DAT readiness, feature-rich cassette deck, and capable three-way speakers make it far more than a typical compact stereo system. It remains an excellent blend of collectible design, impressive engineering, and genuinely enjoyable everyday listening.

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ONKYO Integra K-701 (TA-2550) (1988)

 

The Integra K-701 from 1988 was a high-performance three-head cassette deck engineered by Onkyo for audiophiles who demand exceptional recording and playback quality. At the heart of the deck is a premium three-head configuration featuring a PCOCC (Pure Copper by Ohno Continuous Casting) recording/playback head. This advanced oxygen-free copper winding technology improves signal transmission efficiency, reducing losses and preserving musical detail across the entire frequency spectrum. Each head assembly undergoes comprehensive performance testing to ensure precise recording and playback characteristics, while a rigid zinc die-cast mounting structure maintains optimal tape alignment for maximum accuracy and reliability. The amplifier section reflects Integra's commitment to high-fidelity audio design. A newly developed ultra-low-impedance Super Linear power supply provides exceptional stability and transparency, improving low-frequency resolution, dynamic range, and high-frequency clarity. Independent power supplies for the audio circuits, fluorescent display system, and transport mechanism minimize interference and noise. To enhance recording performance, the K-701 incorporates a dedicated low-impedance recording amplifier with a specially developed buffer stage. This design improves channel separation while isolating the audio path from motor and display-related noise, resulting in cleaner recordings with greater detail, depth, and realism. The transport mechanism is equally sophisticated, utilizing separate motors for capstan drive, reel drive, and mechanical operations. A large-diameter precision-balanced flywheel, precision-finished capstan shaft, and high-torque low-ripple motors ensure stable tape movement and low wow and flutter performance. The silent transport mechanism contributes to smooth operation and highly accurate music reproduction. The Integra K-701 is also equipped with Dolby HX Pro, an advanced recording system that dynamically optimizes bias levels during recording. This technology significantly improves high-frequency headroom and dynamic range, allowing the deck to capture demanding musical passages with greater accuracy and reduced distortion. Dolby B and Dolby C noise reduction systems are also included to minimize tape hiss and enhance overall listening quality. A sophisticated real-time counter displays elapsed and remaining tape time in minutes and seconds, improving editing accuracy and tape management. The system automatically calculates tape position and remaining recording time while supporting multiple cassette lengths, including C-46, C-54, C-60, C-80, C-90, and C-120 formats. The deck also features advanced locating functions for precise cueing and editing. To optimize performance with different tape formulations, the K-701 includes AccuBias Control, allowing precise bias adjustment for maximum recording quality. Additional features include a 16-segment peak-hold level meter, automatic tape monitor switching, full and block repeat playback modes, timer standby operation, MPX filter, automatic tape slack removal, vibration-damping cork-insulated feet, and a polarity-indicated power cord. Finished in elegant black (only), the Integra K-701 represents one of the most advanced cassette deck designs of its era, combining premium PCOCC head technology, Dolby HX Pro recording enhancement, precision three-motor transport engineering, and sophisticated low-noise circuitry to deliver outstanding analog audio performance. 

Specifications: Heads: 3 - PCOCC record/playback head, erase head | Wow & Flutter: 0.038% WRMS, ±0.07% W Peak | Frequency Response: Metal Tape: 30Hz–19kHz ±3dB Chrome Tape: 30Hz–18kHz ±3dB Normal Tape: 30Hz–17kHz ±3dB | Signal-to-Noise Ratio:

60dB (Metal Tape, 3% THD) 70dB (Dolby B NR) 80dB (Dolby C NR) | Motors: DC Servo Capstan Motor, DC Reel Drive Motor, DC Mechanism Drive Motor | Dimensions: 435 × 131 × 366 mm | Weight: 5.8 kg | Onkyo Integra K-701 (Original sale price in Japan: 69.800 yen) | International market model available in black and silver, Onkyo TA-2550 (Original sale price in Germany 850 DM)

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ONKYO Intec 275 (2001) | Premium Sound

 

It's not just about hearing music; it's about feeling surrounded in a space filled with music. That feeling when your mind and body are drawn into the music, and sometimes become one with it. Onkyo Intec 275. A full-fledged audio system that combines ease of use with a compact 275mm width. Its premium sound adds a world of musical imagination to your life. Is it a sound quality you can enjoy for a lifetime. Pretty basic "marketing talk" isn't it? Don't worry more details will be soon available on our 1001 Hi-Fi Classics webpage here.

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ONKYO Radian C70 (1989)

 

The Onkyo Radian C70 is a "Real-Time CD multi program compo" from 1989. This top-of-the range midi hi-fi system featured a wide variety of comfort functions such as: Real-time super dubbing/recording - Simply insert the CD and tape, then press the switch once. It fully automates advanced editing operations, from peak level searching and tape cueing to real-time time-end editing based on the remaining tape time, and fade-outs. This ensures high-quality CD recording. | CD Multi-file / Up to 227 discs on one disc. Each unit stores four personal menus. Contents such as character selection, memory selection, graphic pattern, and digital peak search are filed away. It offers a new way to enjoy CD playback. | CD PLAYER - High-performance model employing optical digital transmission: Optical digital transmission sends music via optical fiber all the way to the D/A converter built into the amplifier. This advanced technology achieves high-purity sound. | CASSETTE DECK - Equipped with high-quality Dolby HX-PRO sound. You can automatically record side A to side A and side B to side B. Twin real-time counter. Real-time counters that digitally display the elapsed/remaining time of the tape in minutes and seconds are independently equipped on Tape 1 and Tape 2. This is highly effective for advanced editing tasks. | Other Features - Dolby B/C NR REC Level Volume, Double reverse mechanism, 5-segment level indicator, Fully automatic tape selector | AMPLIFIER - Digital amplifier with built-in high-precision D/A converter. It features a built-in D/A converter that converts digital signals into music. In addition to optical digital signals from CD players, it also widely supports digital inputs from DAT decks and BS tuners. AV amplifier with a wide range of video input and output options. It features three video inputs and two video outputs. In addition, it has two S-video input and output terminals. Other Features: Dynamic Presence Circuit for powerful bass, Dynamic Surround Circuit with 80 W + 80 W (EIAJ) power, Source Direct, REC function for recording a source different from the music you are listening to. Other features: FM/AM/TV audio multiplex digital tuner; 10 stations per band, 30 stations total preset memory; 4-system timer selector: Sleep/Play/Record 1 & 2. | 3WAY SPEAKER SYSTEM - Pure Cross Carbon 27cm Woofer. A large-diameter pure cross-carbon woofer directly reproduces the powerful bass contained in digital sources. Furthermore, high-quality units are also used for the midrange and treble frequencies. The magnetic shielding design reduces interference with cathode ray tubes and other components. Furthermore, the round baffle design prevents sound wave diffraction, resulting in richer musical expression. | GRAPHIC EQUALIZER (sold separately) Ultra-comfortable 4-spectrum analyzer/electronic graphic equalizer. A remote-controlled 4-spectrum equalizer with independent left and right control. Because it has 4 spectrum analyzers, you can simultaneously view spectrum analyzer operation and equalizer patterns, or display rear-level patterns. | SUPER WOOFER (sold separately) This super woofer adds even more appeal to Radian's superb sound with its ultra-low frequencies. Another combination was the so called "Center System" (cover photo). This system replaces the loudspeaker system presented above with a more compact (but high quality) bookshelf speaker. Also this version does not contain the turntable.

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ONKYO M-5890/P-3890 (1992) | Integra High-Fidelity

The Onkyo M-5890 (M-588) from 1992 delivers an exceptionally clean and authoritative audio performance by leveraging its twin-mono construction to virtually eliminate crosstalk, resulting in a wide, pinpoint-accurate stereo image. Its high-current 3-parallel push-pull output stage provides the muscularity needed to grip demanding speakers, ensuring deep, controlled bass and effortless transients even during complex musical passages. The integration of the Super Balance Circuit and Double Super Servo minimizes distortion and noise floor, allowing micro-details and subtle textures to emerge with lifelike clarity. Thanks to the LASER transformer’s shielding, magnetic interference is neutralized, preserving the purity of the signal for a warm, musical character that remains transparent across the entire frequency spectrum. The Onkyo M-5890 delivers a continuous power output of 200 watts per channel into 8 ohms, with dynamic power reaching an impressive 750 watts at 2 ohms to accommodate low-impedance loads. Precision is further refined by a 70μm thick copper foil circuit board and a custom-made detent volume control featuring gold-plated sliders and a high-internal-loss brass shaft to eliminate micro-distortions across the entire frequency range. Size (W/H/D) 455x190x426mm | Weight 29,6kg | Original sale price in Germany 3500 DM

The Onkyo P-3890 (P-388) preamplifier is the critical counterpart to the M-5890, designed to establish a totally balanced configuration from source to output. It mirrors the amplifier’s high-end architecture with its own dual-mono structure and "Super Balance" circuitry, featuring a double-differential input and double-servo design that eliminates noise induced during transmission. By utilizing two dedicated AEI LASER transformers—one specifically for line sources and another for phono stages—the P-388 ensures that delicate signals remain unpolluted by power supply fluctuations. For vinyl enthusiasts, the P-3890 offers a sophisticated phono section with independent MM and MC circuits, built using discrete components rather than integrated circuits to preserve a pure, analog warmth. Its design philosophy of "simple is best" omits standard tone controls in favor of a direct signal path, which results in stunning dynamic contrasts and authentic detail. When paired with the M-5890 via XLR balanced connectors, this duo functions as a singular, cohesive system that delivers superior bass slam, cleaner midrange, and a more expansive soundstage than previous Integra models. Size (W/H/D) 466x90x418mm | Weight 8,9kg

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ONKYO TA-6711 (1997) | Integra High-Performance

 

The Onkyo TA-6711 from 1997 was one of the last "high-performance" cassette recorders ever manufactured. It was a high-performance 3-head cassette deck engineered for those seeking true professional recording quality in a home audio component. Its precision three-motor transport incorporated a regulated dual-capstan drive with full electronic logic control, maintaining optimal tape tension and ensuring constant head-to-tape contact across the entire cassette for exceptional speed stability, reduced wow and flutter, and superior sonic accuracy. The advanced linear-glide loading mechanism, combined with a dedicated cassette stabilizer, secured the tape firmly in place while minimizing vibration and mechanical resonance. Separate record and playback heads, each optimized for its specific function, along with a dedicated erase head, allow real-time monitoring and enhanced recording precision, while high-grade PC-OCC head cabling preserves signal purity. A discrete ultra-low-impedance linear switching power supply, partnered with a high-quality shielded AEI transformer, reduces electromagnetic interference and safeguards audio integrity. Onkyo’s fully automatic Accubias system automatically calibrates recording parameters to match the selected tape formulation, with manual adjustment available for fine-tuning to personal preference. Additional features include Dolby HX Pro headroom extension, Dolby B and C noise reduction, independent level and balance controls, CD synchronized recording, automatic tape type selection, switchable MPX filter, real-time tape counter, forward and reverse music search, a large 5-segment FL display with dual 24-segment peak level meters and peak memory, front-mounted microphone inputs for left and right channels, and a resonance-resistant stamped steel chassis, making the TA-6711 a highly capable and audiophile-grade vintage cassette deck. Specifications: 3-head system, Hard Permalloy | 2+1 Motor mechanism | Wow & Flutter 0,045% WRMS | Frequency response 20-20.000 Hz Metal tape | Dimensions (W/H/D) 435x131x370mm | Weight 7,2kg

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ONKYO Integra CP-1057FB (1987) | Double Suspension

 

The CP-1057FB is a 2-motor, Fully Automatic Direct-Drive Turntable with AT-UL3 MC Cartridge. High-quality technology in a triple-protected sub-chassis against footfall and feedback. Direct drive with quartz-controlled PLL DC motor, microprocessor-controlled functions, separate tonearm motor, and repeat function. Low-mass, straight tonearm with ADC connection, complete with AT-UL 3 moving-coil cartridge and replaceable elliptical diamond stylus. Gold-plated 330 mm platter with heavy antistatic mat. Operation with the dust cover closed. Available in black only. Specification: Quartz locked direct drive fully automatic turntable | 2-motor micro-computer design | Platter 330mm aluminum die-cast | Motor - Quartz locked direct drive brushless DC motor - Separate motor for arm movement | Wow & flutter 0,023% (WRMS) | Tonearm - Statically balanced straight type -226mm | Size (W/H/D) 442x160x410 mm | Weight 8,8kg | Original sale price in Germany 990 DM | Optional remote RC-5T 120 DM

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ONKYO Integra DX-6750 (1990) | Accu-Pulse D/A

 

Top-of-the-line CD player with extremely high digital resolution and separate Accu-Pulse D/A converters, one of the first Onkyo CD player featuring 1-bit conversion. This sophisticated circuitry guarantees absolutely faithful sound reproduction full of warmth and naturalness. Convenient features include 20 directly programmable tracks via a numeric keypad, switchable display brightness, four playback modes (normal, shuffle play, preset, sequence), and a time-edit function for precise dubbing to a cassette deck and Peak Search function for identifying the maximum level of the CD record. The DX-6750 has three outputs: optical digital output, fixed analog, and adjustable. All the important functions of this high-end CD player are remotely controllable (RC-176 C), including the motorized volume control. Available in black or silver, complete with remote control (RI-compatible). Specifications: Frequency Response: 2-20 000 Hz | Dynamic Range: 100 dB | Signal-to-Noise Ratio: 110 dB | Dimensions (W x H x D): 435 x 131 x 365 mm | Weight: 8,0 kg | Special Features: Accu-Pulse D/A Converter | 20 Presets, IR Remote Control | Matching amplifier: A-8780 | Original sale price in Germany 1000 DM

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Onkyo D-5 (1981) | Pure, Natural, and Expressive Sound

 

Just as musical styles evolve, so do the trends in sound reproduction. Onkyo’s approach to speaker design has always focused on natural expressiveness—creating sound that stays true to the original recording without coloration or distortion. A speaker’s true character depends on the quality of its diaphragm, and Onkyo has achieved remarkable purity with its innovative Delta Olefin diaphragm. Unlike conventional materials, Delta Olefin offers minimal resonance and fast decay characteristics, delivering smooth, accurate sound reproduction across all frequencies. In technical terms, it provides a low Q factor and quick transient response—but from a musical perspective, it means the speaker “breathes” naturally, resonating only with the music itself. The result is a clear, detailed, and emotionally engaging sound that faithfully reflects every nuance of the performance. This advanced three-way speaker system showcases Onkyo’s commitment to high-fidelity engineering:

Low frequencies: 28 cm cone-type woofer with a Delta Olefin diaphragm and dust cap. Equipped with a four-layer voice coil and Capton bobbin for improved power handling and precise bass control.

Midrange: 10 cm cone driver, also crafted from Delta Olefin, housed in a dedicated 1-liter sealed enclosure to eliminate interference and ensure pure midrange reproduction.

High frequencies: 2.5 cm soft-dome tweeter made from specially developed chemical fibers with uniform thickness, achieving up to 2–3 dB higher efficiency than conventional designs.

Fine-tuning: Independent level controls for both midrange and high frequencies allow personalized sound adjustment.

The result is the distinctive “Delta Olefin Sound”—a long-awaited breakthrough that meets the demands of  discerning music enthusiasts. With exceptional clarity, natural tonality, and sensitivity to every genre, this Onkyo loudspeaker stands at the forefront of modern high-fidelity audio. Maximum power: 120W | Frequency range: 33-30.000Hz | Impedance 6ohm | Size: 350x630x325mm (W/H/D) | Weight: 16,5kg

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ONKYO Radian F7 (1988) | Multi Program Compo

 

The Onkyo Radian F7 consists of the following components: PL-99X fully automatic turntable, PT-F77 TV-FM stereo tuner, PA-F77 stereo integrated amplifier, PE-F77 graphic equalizer, PC-WF77 stereo double cassette deck, DX-F77 compact disc player and PS-F77 loudspeakers.

Main features: The CD triple file allows the CD player to store three pieces of information for each favorite disc. The contents are: a character file that displays your favorite characters (alphabet + numbers + symbols), a memory selection file that programs and plays your favorite song order, and a graphic equalizer pattern file that lets you specify your favorite sound arrangement. It's a new way to enjoy compact discs. The CD player is a High-performance model using optical digital transmission that transmits music via optical signals to the D/A converter built into the amplifier. The cassette deck is equipped with two real time counters that digitally display the elapsed time and remaining time on the tape in minutes and seconds. Time information for Tape 1 and Tape 2 is displayed independently. Editing from CD to tape and from tape to tape has been greatly improved in accuracy. This is a double REC double reverse deck with two recording/playback reverse mechanisms. It can record to two tapes at once, record to tape 1/2 simultaneously, record continuously for 3 hours using two C-90s, and record continuously from tape 1 to tape 2 on both sides. The REC level volume allows you to manually set the recording level, making it possible to accommodate advanced recording techniques. Other functions include: ● Dolby B/C NR 15-track skip selection ● Fully automatic tape selector that automatically detects tape grade (Normal/High/Metal) ● A separate program can be recorded on tape 1/2 while you are away ● Synchronized recording with CD player possible. The tuner/timer is a FM/AM/TV audio multiplex digital tuner. It has a dual display that shows the time and station separately. The PE-F77 is a multi-functional graphic equalizer equipped with four spectrum analyzers. Display 2 can select and display four positions: source, effect, rec, and rear. ●Remote control compatible ●10 patterns stored in memory (5 programs, 5 user sets) ●Peak hold ON/OFF ●Flat switch, reverse switch ●Compatible with CD graphic equalizer pattern files. System remote control included as standard. The amplifier has a built-in D/A converter that converts digital signals into music. In addition to optical digital signals from CD players, it also supports digital input from DAT decks and BS tuners. It also automatically selects the sampling frequency depending on the source, such as 32kHz, 44.1kHz, or 48kHz. By simply adding rear speakers, you can enjoy surround sound with a sense of realism. Moreover, the dynamic surround circuit enhances the surround effect even with just the front speakers. The power is 80W+80W (EIAJ). The loudspeakers are 3-way system. The 27cm woofer is made of advanced high-rigidity material, cross carbon. It directly reproduces the powerful bass contained in the digital source. In addition, the squawker that reproduces the midrange is a delta olefin refined 10 cm unit that brings out the natural vocals, and the treble is a 5cm cone unit. The speaker system is magnetically shielded to reduce the impact on CRTs, etc. Maximum depth 355 (record player), Height of each combo: Record player = 104mm, Tuner = 71.5mm, Amplifier = 129.5mm, Graphic equalizer = 122mm, Cassette deck = 122.5mm, CD player = 124.

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ONKYO Icon Series Amplifier (2025)

 

Onkyo has unveiled at CES 2025 in Las Vegas an all-new amplifier series, the Icon Series. The Ikon Series consists of the P-80 network pre-amplifer, M-80 power amplifier, and A-50 integrated amplifier. The amplifier includes the likes of Onkyo’s own Dynamic Intermodulation Distortion Reduction Circuitry (DIDRC), which aims to “improve the sound of analogue recordings and stabilises audio signals with positive and negative signal symmetry to reproduce minute signals such as those of MC cartridges, even when amplified.” The series also features the Dirac Live Room Correction circuit. This enables users to optimise audio performance for their listening space while additional highlights include high-performance 32-bit/768kHz AK4452 DACs in the P-80 and A-50 models. The Onkyo Icon P-80 Network Preamplifier features a dedicated phono stage (for MM and MC cartridges), HDMI ARC, and wireless connectivity like AirPlay 2, Chromecast, and Bluetooth. Spotify, TIDAL, and Amazon Music, and is Roon Ready are also included in a premium housing featuring aluminium front panel. The Icon M-80 Power Amplifier has a power rating of 200W at 4 ohms and 150W at 8 ohms and its a symmetrical Class AB design. The Onkyo Icon A-50 Integrated Amplifier has a power output of 180W at 4 ohms and 140W at 8 ohms. It also features HDMI ARC, Dirac Live Room Correction, and a built-in phono stage. The Onkyo Icon Series will be available later in 2025. The P-80 Network Preamplifier and M-80 Power Amplifier are priced at $1,999 each, while the A-50 Integrated Amplifier is priced at $1,499.

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