The ONKYO Integra A-2001 is a classic integrated amplifier from the 1980s that continues to impress audiophiles to this day. Known for its exceptional sound quality and robust build, this amplifier delivers crisp and powerful audio, making it perfect for music enthusiasts and home theater setups alike. With its sleek and elegant design, it seamlessly blends into any audio system. The ONKYO Integra A-2001 features various inputs and outputs, allowing users to connect multiple devices effortlessly. If you’re seeking a vintage amplifier that stands the test of time in both performance and aesthetics, the ONKYO Integra A-2001 is an excellent choice..
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ONKYO Integra A-2001
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¥ 280,000 (Released in November 1988)
Commentary
A pre-main amplifier that combines a high-purity amplifier circuit with a simple transmission circuit, and also incorporates a D/A converter.
The power amplifier section uses a newly developed optical drive system.
In this method, the reference current of the first stage differential amplifier circuit is obtained from a photovoltaic element that generates a constant voltage when light is irradiated. By obtaining a reference current with higher accuracy than that of the conventional method, highly accurate V to I conversion is performed.
In the final stage of the power block, a parallel push-pull system composed of four large output transistors with a collector loss of 150W is adopted to realize an output with a margin.
To prevent interference between analog and digital circuits in the power supply section, a dedicated power transformer is used for digital circuits, and a super-large power transformer with windings for each secondary side Line 5 is installed for analog circuits.
The rectifier and smoothing circuit employs eight low-impedance twin-roll Chemi-Cons (96,000 μ F) with a resistance value one third of that of conventional ones, and a high-speed rectifier diode with a fast recovery time to provide a stable current supply.
In order to prevent adverse effects of vibration, we have adopted a high carbon steel rigid chassis with high density, high mass and excellent vibration resolution capability. All components such as power transformers and amplifier circuit boards are mounted on this base.
This chassis has a 6-point mounting structure that ensures a stable setting by balancing the weight of the Integra A-2001.
In order to prevent distortion due to mutual interference of each circuit, four block complete separate construction is adopted.
The power supply block is placed at the end of the box and completely separated by a shield plate. Furthermore, the light-driven D/A converter and the digital processing circuit are each enclosed in an electromagnetically shielded copper-plated case and separated on the opposite side from the power supply.
The digital circuit is equipped with a newly developed real 18-bit optically driven twin D/A converter.
Model Rating
| Type | Digital basic amplifier |
| Amplifier Unit | |
| Rated output (20 Hz to 20 kHz CD → sp out, both channels driven) |
170W + 170W (6 Ω) 150W + 150W (8 Ω) |
| Dynamic Power | 490W + 490W (2 Ω) 350W + 350W (4 Ω) 220W + 220W (6 Ω) |
| Total harmonic distortion rate (20 Hz to 20 kHz) | CD → sp out : 0.004% (8 Ω at rated output) Phono MM → rec out : 0.003% (at 3 v output) Phono MC → rec out : 0.015% (at 3 v output) |
| Intermodulation distortion factor (20 Hz to 20 kHz) | CD → sp out : 0.004% (at rated output) |
| Powerbandwidth | 5 Hz to 100 kHz (IHF-3dB, THD 0.2%, 8 Ω) |
| Damping factor (1 kHz, 8 Ω) | 100 |
| Frequency characteristic | Phono → rec out (RIAA deviation) : 20 Hz to 20 kHz ± 0.2 dB CD → sp out : 2 Hz to 100 kHz + 0 -3dB |
| Input Sensitivity / Impedance | Phono MM : 2.5mV/47k Ω Phono MC : 160 μ V/220 Ω CD, etc. : 150mV/47k Ω |
| Phono maximum allowable input (1kHz/10kHz, 0.005%) |
MM:210mV/1000mV MC:15mV/75mV |
| Rated output voltage / impedance | Tape rec, others : 150mV/560 Ω Pre out : 1V/600 Ω |
| Video input / output | VCR, Others : 1Vp-p/75 Ω |
| SN ratio (IHF-A filter input short) | Phono MM : 95 dB (5 mV input) Phono MC : 77 dB (0.5 mV input) CD, other : 107 dB |
| Tone Control Maximum Change (Volume -16dB) |
Bass : + / – 10 dB Treble : + / – 8 dB contrabass:+10dB |
| Muting (under Volume Center) | -20dB |
| Digital input / output | Electrical : 1Vp-p/75 Ω Optical : TOSLINK criteria |
| Sampling frequency | 32 khz, 44.1 khz, 48 khz |
| Total Harmonic Distortion Rate (1 kHz at 0 dB) | 0.002% |
| Dynamic range | 100dB |
| Power supply voltage | 100 VAC, 50Hz/60Hz |
| Power consumption (Electrical Appliance and Material Control Law) | 270W |
| AC outlet | Switched : 2 systems, total 200W Unswitched : 2 lines, 200W total |
| External dimensions | Width 477x Height 183x Depth 453 mm |
| Weight | 32.0kg |
The ONKYO Integra A-2001 is an integrated amplifier that was manufactured by the Japanese audio equipment company ONKYO in the 1980s. An integrated amplifier combines both a preamplifier and a power amplifier in a single unit, making it a space-saving option for audio enthusiasts.
The ONKYO Integra A-2001 was highly regarded for its sound quality and advanced features. It had a power output of 200 watts per channel, allowing it to deliver a powerful and dynamic audio performance. The amplifier was designed with high-quality components and a sturdy build, ensuring long-lasting durability.
One notable feature of the A-2001 was its extensive connectivity options. It featured multiple inputs for different audio sources, including turntables, cassette players, and CD players. Additionally, it had a selection of tone controls, allowing users to customize the sound to their preference. The amplifier also came with a headphone output for private listening.
The ONKYO Integra A-2001 was praised for its accurate and balanced sound reproduction, with a detailed midrange and clear highs. It had a smooth and controlled bass response, providing a rich listening experience. It was considered a premium amplifier in its time and is still sought after by audio enthusiasts and collectors today.
Overall, the ONKYO Integra A-2001 was a high-quality integrated amplifier that offered exceptional audio performance and versatile connectivity options. It remains a coveted vintage audio piece appreciated for its superior sound quality and durable design. –
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