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Luxman 505x Integrated Amplifier

AED 5,500

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 Luxman SQ-505X is a highly revered, premium vintage solid-state integrated stereo amplifier manufactured in Japan between 1971 and 1974. Known as a transitional piece built during the early era of moving from vacuum tubes to transistors, it is deeply loved by audio enthusiasts for its warm, tube-like sonic character, impeccable hand-soldered build quality, and signature Brazilian Rosewood wooden enclosure.

Technical Specifications

The SQ-505X features a full-stage direct coupling design with a pure complementary output stage and two independent power supplies.
• Power Output: It delivers 30 to 35 Watts continuous RMS per channel into 8 ohms.
• Frequency Response: Wide-band performance ranging from 10Hz up to 60kHz.
• Total Harmonic Distortion (THD): Exceptionally low for its time, measured at less than 0.04%.
• Physical Profile: It measures roughly 450 x 160 x 268 mm and weighs approximately 10 to 10.5 kg.
Additional operational aspects include a damping factor of 30, selectable phono impedance switching (30k/50k/100k ohms), and an early implementation of the proprietary "Lux Type NF" tone control network with flexible crossover turnover points. For full detailed engineering schematics and operational diagrams, you can refer to the comprehensive HiFi Engine SQ-505X Manual.

Sound Profile & Performance Review

Community consensus across vintage audio forums like Audiokarma paints a vivid picture of how this half-century-old amplifier performs in modern contexts.
• The Acoustic Signature: Unlike the ultra-precise, clinical presentation of modern Class D or heavy solid-state gear, the SQ-505X leans heavily into a lush, punchy, and incredibly musical soundstage. It delivers a notably quick, full-bodied bass response and warm midrange textures that excel with vocals, acoustic arrangements, and classic rock.
• The Phono Stage: The built-in Moving Magnet (MM) phono preamp is highly celebrated. Thanks to ultra-low noise silicon transistors, it handles vinyl playback with a high degree of transparency and silent backgrounds.
• Vintage Trade-offs: While it possesses beautiful musicality, reviewers note it trades off a bit of raw modern micro-detail and ultimate high-frequency headroom. Being an entirely analog vintage machine, it lacks a remote control and requires an outboard DAC if you intend to stream digital music.