SANSUI AU-ALPHA 607DR

Second-hand. In good conditions. Shows some signs of wear as shown in the photos. Without Original packaging.

The Sansui AU-α607DR is an integrated amplifier that embodies the excellence and refinement of Japanese audio tradition — a true gem for sound enthusiasts. At the heart of the AU-α607DR lies the renowned α-X balanced circuit, a revolutionary innovation that operates completely independently from the ground circuit, ensuring pure signal transmission free from external interference. This advanced architecture allows for balanced amplification, minimizing phase distortion and delivering a full, controlled, and natural sound.

The amplification system employs a push-pull configuration with four amplifiers — two for each channel, positive and negative. This setup enables perfectly symmetrical speaker driving, resulting in a stable, powerful, and well-controlled sound performance across the entire frequency range. A key feature of this design is the use of NM-LAPT transistors, specifically developed for audio applications. These next-generation components improve dynamic response and reduce circuit impedance, contributing to a vivid and richly nuanced listening experience.

The Sansui AU-α607DR is equipped with a balanced power supply in a closed-loop configuration, incorporating custom-made electrolytic capacitors and high-efficiency power transformers. This ensures a steady, stable energy delivery perfectly suited to the dynamic demands of music, even during its most intense passages.

From a structural perspective, the amplifier features a reinforced twin monaural construction designed to maintain ideal weight balance and minimize unwanted vibrations. Special attention has been given to the signal path: every critical point, such as the connection between the volume control and the chassis, is equipped with a mechanical isolation system using pure copper components and an innovative opposed mechanical feedback mechanism. The result is an acoustically neutral playback environment where every note emerges with crystal-clear definition.

Technical Specifications:

• Power output: 90 watts per channel into 8Ω (stereo)
• Frequency response: 1Hz to 200kHz
• Total harmonic distortion: 0.003%
• Damping factor: 150
• Input sensitivity: 0.16mV (MC), 2.5mV (MM), 150mV (line)
• Signal to noise ratio: 70dB (MC), 88dB (MM), 110dB (line)
• Output: 150mV (line)
• Speaker load impedance: 4Ω to 16Ω
• Dimensions: 460 x 159 x 446 mm
• Weight: 18 kg