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Integra A-755 Nii/100

AED 2,200

HiFi

5.0

16 items live

Item Details

Age

10+ years

Condition

A bit of wear and tear, but in good working condition

Warranty

Yes

Usage

Used an average amount, as frequently as would be expected

Posted on: 24th October 2026

Description

The Onkyo Integra A-755NII/100 is a vintage 1975 pre-main integrated amplifier built for the Japanese domestic market (running on 230V), delivering a warm, high-grade analog sound with a heavy-duty build.

Key Specifications

• Power Output: 50W + 50W (8Ω, 1 kHz), 55W + 55W (4Ω, 1 kHz), or 45W + 45W (8Ω, 20 Hz–20 kHz); Dynamic power of 160W (8Ω).
• Total Harmonic Distortion (THD): 0.05% or less at rated output.
• Intermodulation Distortion (IMD): 0.05% or less.
• Frequency Response / Bandwidth: Power band of 10 Hz – 100 kHz.
• Signal-to-Noise Ratio (S/N): 110 dB (main-in), 75 dB (Phono), 90 dB (Tuner/AUX).
• Dimensions & Weight: 467 x 161 x 384 mm; weighs approximately 12.8 kg (28 lbs).
• Power Consumption: 130W standard (350W maximum).

Design & Features

• Circuitry: Features a differential single-stage constant-current drive OTL (output transformerless) circuit, operational-amplifier tone and equalizer circuits, and a pure copper bare earth line.
• Volume Attenuator: Precision attenuator volume with a tight ±0.5 dB error specification.
• Phono & Inputs: Dual phono inputs with selectable phono cartridge sensitivity, plus tuner, auxiliary, and tape loop connections.
• Tone Controls: Switchable turnover frequencies for bass (125 Hz, 400 Hz) and treble (2 kHz, 8 kHz), alongside high-cut and low-cut filters.
• Power Requirement: Designed specifically for 100V Japanese mains voltage, meaning international users typically require a step-down transformer to operate it safely.

Review & Performance Notes

• Build Quality: Collectors praise the series for its heavy metal chassis, engraved faceplate details instead of cheap paint, and high-grade internal components.
• Sound Profile: Known for delivering a thick, clean, and musical presentation that punches well above standard mid-fi receivers of the era.