SANSUI AU - α 607

Commentary

Integrated amplifier with α -X balanced circuit.

The power amplifier section uses SANSUI's unique α -X balanced circuit.
In the α -X balanced circuit, the signal circuit, the power supply circuit, and the NFB circuit completely separate the signal from the earth, eliminating the IHM distortion. Furthermore, the balance amplifier in the pre-part enables the α -X balanced transmission of not only the α -X balanced input but also the normal input.
In this circuit, the + and - sides of the speakers are each driven by a dedicated amplifier, so the speaker movement can be controlled by the amplifier.

The power supply section uses an α - X balanced power supply that supplies energy independently of the ground. This eliminates noise from the AC line and prevents unbalanced and ripple currents from flowing into the speakers. In addition, the power supply system separates the power stage from the voltage amplification stage to eliminate mutual interference.
A super-heavyweight transformer is used for the power transformer and a great supply capacitor is used for the capacitor.

A newly developed solid chassis has been adopted for the chassis structure to achieve high rigidity and cut electromagnetic noise.

CF5 (Chassis Fixed 5-point Support) insulator is used for the leg part. By placing a fifth compliant insulator near the power supply part where the weight is concentrated, load balance is taken and mechanical earth is realized.

It uses a CF12 (chassis fixed, 12-point) bonnet.
In the CF12 bonnet, the U-shaped rigid bonnet determined from the results of vibration analysis is fixed to a solid chassis using 12 screws, which are much larger than conventional ones, to suppress resonance and vibration.

The MM/MC phono equalizer uses an FET input.

Equipped with a source direct function, all sources can be directly connected to the α -X balance circuit without passing through an accessory circuit, and the tone control can also be used for source direct.

Equipped with a tone control with defeat.

Gold plated terminals are used for CD, Phono, and Tape/DAT-1 terminals.

Uses a power cord with polarity display.

Equipped with a REC selector with OFF position.

The front panel is a glossy & hairline finish made of aluminum material.

Model Rating

Type	Integrated DC amplifier
Power Amplifier Unit
Effective output (10 Hz to 20 kHz, both channels driven)	105W + 105W (6 Ω) 90W + 90W (8 Ω)
Total harmonic distortion factor (at effective output)	0.003% or Less (8 Ω)
Cross modulation distortion factor	0.003% or Less (8 Ω)
Damping factor	80 (6 Ω)
TIM (SAWTOOTH)	Below the measurement limit
Slew rate	± 180 V / μ sec
Equalizer Section
Input Sensitivity / Impedance (1 kHz)	Phono MM : 2.5mV/47k Ω Phono MC : 300 μ V/100 Ω CD, Tuner, Line, Processor : 150mV/47k Ω Tape play/DAT-1, 2, 3 : 150mV/47k Ω
Phono maximum allowable input (New IHF, THD 0.01%)	MM:210mV MC:21mV
Frequency Response (at 1W)	Phono MM : 20 Hz to 20 kHz ± 0.2 dB CD, Line, Tape play/DAT-1, 2, 3 : 1 hz ~ 300 khz + 0 -3dB
SN ratio (at 1W)	Phono MM : 88 dB or more Phono MC : 70 dB or more Tuner, Line, CD : 110 dB or higher Tape play/DAT-1, 2, 3 : 110 dB or more
Tone control	Bass : + / - 5 dB (50 Hz) Treble : ± 5 dB (15 kHz)
Turnover frequency	150 Hz, 7 kHz
Subsonic filter	16 Hz (-3dB, 6dB/oct.)
Loudness	+ 8 dB at 50 Hz, + 6 dB at 10 kHz
Muting	-20dB
<General>
Rated power consumption (Electrical Appliance and Material Control Law)	240W
External dimensions	Width 448x Height 160x Depth 441 mm
Weight	15.7kg