SANSUI AU - α 507R

Commentary

A wide-range DC pre-main amplifier designed to bring out the full appeal of CDs.

The transformer of the power supply section uses a model with enhanced vibration and heat resistance with high-density filler.
In addition, an electrolytic capacitor for audio equipment with a high charge / discharge speed is combined.

It uses a rotary switch and volume driven by a small motor controlled by a microcomputer. It realizes remote input function switching and volume control without affecting sound quality.

In order to suppress the slight vibration caused by the power transformer, a strap mount structure is adopted in which the transformer is mounted upside down to reduce the vibration by utilizing the self-weight of the transformer.

It is equipped with source direct and can be amplified without passing through an accessory circuit that is rarely used, such as a balance volume or subsonic filter.

In addition to the loudness that raises the high and low ranges, we have added a bass booth that raises only the low range, which is often lacking in small bookshelf speakers.
Each can be controlled in 2 stages for a total of 4 modes.

A gold-plated CD input terminal is mounted.

Equipped with an MC/MM phono equalizer.

Uses a power cord with polarity display.

Model Rating

Type	Integrated DC amplifier
Effective power (20 Hz to 20 kHz, both channel operation)	80W + 80W (6 Ω) 70W + 70W (8 Ω)
Total harmonic distortion factor (at effective output)	0.008% or Less (8 Ω)
Cross modulation distortion factor	Not more than 0.008%
Damping factor	135 (8 Ω)
Input Sensitivity / Impedance (1 kHz)	Phono MM : 20 Hz to 20 kHz ± 0.5 dB Tuner, CD, Line, Tape1, 2 : DC ~ 200 khz + 0 -3dB
Signal-to-noise ratio	Phono MC : 68 dB or more Phono MM : 83 dB or more Tuner, CD, Line, Tape1, 2 : 110 dB or more
Tone control	Maximum variation of Bass : ± 8 dB (50 Hz) Maximum variation of Treble : ± 8 dB at 10 kHz
Subsonic filter	16 Hz (-3dB), 6dB/oct.
Loudness 1	+ 9 dB at 50 Hz, + 3 dB at 10 kHz
Loudness 2	+ 9 dB at 50 Hz, + 6 dB at 10 kHz
Bus Boost 1	+10dB(50Hz)
Bus Boost 2	+11dB(50Hz)
Rated power consumption	140W
External dimensions	Width 430x Height 135x Depth 360 mm
Weight	11.2kg
Attachment	Remote Control RS 1480