Onkyo INTEGRA A 701XG (c. 1989)
An integrated amplifier with built-in D/A converter, combining high-power analog amplification and early digital audio support.
Overview
The Onkyo Integra A-701XG is an integrated amplifier with a built-in D/A converter. It was made for hi-fi systems during the move from analog to digital sources. It shares an analog base with the A-817XG and adds digital circuitry that was advanced for its time, including optical and coaxial digital inputs. The unit delivers 80 watts per channel into 8 ohms and 100 watts into 6 ohms, with extremely low distortion on both the analog and phono stages. A wireless remote (model RS 160 a) handles volume and input selection, and the mechanical controls are motor-driven.
Specifications
| Rated Output (20 Hz ~ 20 kHz) | 80W + 80W (8 Ω, both channel drive) |
| Rated Output (20 Hz ~ 20 kHz, 6 Ω) | 100W + 100W (both channel drive) |
| Dynamic Power 2 Ω | 245W + 245W |
| Dynamic Power 4 Ω | 195W + 195W |
| Dynamic Power 6 Ω | 155W + 155W |
| Total harmonic distortion rate (20 Hz to 20 kHz) | 0.0015% (CD → SP Out, at 10W output, 8 Ω) |
| Total harmonic distortion rate (20 Hz to 20 kHz) | 0.003% (Phono MM → Rec Out at 3 v output) |
| Total harmonic distortion rate (20 Hz to 20 kHz) | 0.015% (Phono MC → Rec Out at 3 v output) |
| Intermodulation distortion factor (20 Hz to 20 kHz) | 0.004% (CD → SP Out, at rated output) |
| Power bandwidth | 5 Hz to 100 kHz (IHF-3dB, THD 0.2%, 8 Ω) |
| Damping factor | 150 (1 kHz, 8 Ω) |
| Frequency characteristic Phono → Rec Out (RIAA deviation) | 20 Hz to 20 kHz ± 0.2 dB |
| Frequency characteristic CD → SP Out | 2 Hz ~ 100 kHz +0, -3dB |
| Phono maximum allowable input MM | 150mV/710mV (1kHz/10kHz, 0.005%) |
| Phono maximum allowable input MC | 9mV/42mV (1kHz/10kHz, 0.005%) |
| Input Sensitivity / Impedance Phono MM | 2.5mV/47k Ω |
| Input Sensitivity / Impedance Phono MC | 160 μV/220 Ω |
| Input Sensitivity / Impedance CD, Tape Play, Processor IN, etc. | 150mV/47k Ω |
| Rated output voltage / impedance Tape Rec, Processor Out, etc. | 150mV/560 Ω |
| Video input / output / impedance VCR, Others | 1Vp-p/75 Ω |
| Digital input / output Electrical | 0.5Vp-p/75 Ω |
| Digital input / output Optical | TOSLINK criteria |
| Digital sampling frequency | 32, 44.1, 48 kHz |
| D/A converter total harmonic distortion factor | 0.0015% at 1 kHz, 0 dB |
| D/A converter dynamic range | 103dB |
| SN ratio (IHF-A filter input short) Phono MM | 94 dB (5 mV input) |
| SN ratio (IHF-A filter input short) Phono MC | 75 dB (0.5 mV input) |
| SN ratio (IHF-A filter input short) CD, other | 107 dB |
| Tone Control Maximum Change Bass | + / - 10 dB |
| Tone Control Maximum Change Treble | + / - 8 dB |
| Muting | -20dB |
| Power | 100 VAC, 50Hz/60Hz |
| AC outlet Switched | 1 system, 100W |
| AC outlet Unswitched | 2 lines, 100W total |
| Power consumption | 205W |
| External dimensions | Width 435 x Height 161 x Depth 394 mm |
| Weight | 14.6kg |
| Attachment | Remote Controller RS 160 a |
Design
The A-701XG uses a BI-MOS drive amplifier, with both MOS FET and bipolar transistors in the output stage. That gives high current and low distortion. The D/A section is 18-bit, with independent left and right real 18-bit converters shielded in a pure copper case. The digital section also has an 8x oversampling filter, 2 PLL digital interface demodulation, and an auto digital OFF circuit to reduce noise. The power transformer has separated secondary windings for different circuit blocks. The construction is block-separated, with the input, voltage amplification, and power amplification sections isolated by heat sinks. There is a source direct switch, a laser transformer, and high-speed rectifier diodes. The audio path has a die-cast detent volume control, gold-plated jacks, large speaker terminals, and an AC cord with polarity display. Digital inputs are three coaxial and two optical routes, with automatic switching on the coaxial ones and a digital lock indicator for 32/44.1/48kHz sampling rates. Video I/O is provided on three routes.
Market
The Onkyo Integra A-701XG was originally priced at ¥95,000 around 1989. Recent listings show used units for sale at 8,000 PHP in the Philippines and Rs 36,500 in Sri Lanka. Both were described as working with no issues and in pristine condition.
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