Audio Database


Technics SU-A700
49,800yen(around the 1994 time)

Technics adopted power MOS-FET developed uniquely, and has realized the MOS class AA.
MOS-FET is in the MOS class AA,It is used for the Class-A operating voltage control amplifier of an original class AA output stage, and while the current amplification amplifier of a bipolar transistor which excels the Oide power operation in one side has exclusive duty of a current supply source, the outstanding linearity is demonstrated by the ideal operating state of the electric-current output 0 to the maximum extent.

-like 1 amplifier has used the toroidal or EI transformer conventionally. The core of the square-shaped cross section which use and is in both types prevents volume attachment of a uniform coil. While this induces a partial convergence of magnetic flux and carries out an efficiency ratio in a hand, a leakage of magnetic flux is generated.
In order to solve this problem, newly developed R core transformer is adopted in technics. Since a coil is closely wound around a circular core for a cross section and uniform magnetic flux is formed, the leakage of magnetic flux has decreased extremely.

The result of the vibration proof structure cultivated with the analog player is carried out in the maximum student, and multilayer structure T.H.C.B. with the periodic-damping property excellent in the chassis base is adopted. According to the multilayer structure by the steel plate chassis and a hard robber, an unnecessary oscillation is reduced and more nearly quality sound is realized.

A high-quality sound X-Pro power source capacitor is adopted.

A high robustness is secured by the input/output switching of the termination hardwired connection by gilding contact relay.

A, the speaker termination of B-2 system. A simultaneous drive (8ohm+8ohm) is also possible.

System remote control possible to the elementary operation of the compact disk player of technics, a tuner, and a cassette deck at one is equipped standardly. Up and down of a volume are a motor drive.

Rating of a mode
Form Integrated amplifier
Output power 50W+50W (20Hz - 20kHz, 0.02%, 6ohms)
40W+40W (20Hz - 20kHz, 0.01%, 8ohms)
Rated distortion 0.01% (20Hz - 20kHz, an Output power, 8ohms)
THD 0.01% (20Hz - 20kHz, Output-power-3dB, 8ohms)
* Total to the 10th higher harmonic
Dumping factor 60 (8ohms)
Load impedance 4-16ohm (A, B), 8-16ohm (A+B)
Frequency characteristic tuner, compact disk, aux, tape1, tape2:20Hz-20kHz (+0dB-0.3dB)
3Hz - 80kHz (+0dB-3dB)
Equalizer deflection 30Hz - 15kHz (+1dB-1dB)
Input sensitivity/impedance tuner, compact disk, aux, tape1, tape2:150mV/22kohm
phono man month: 2.5mV / 47kohm
Tone control property ±10dB : 50Hz, ±10dB: 20kHz
S/N ratio tuner, compact disk, aux, tape1, tape2:83dB (EIAJ), 99dB (IHF'66)
phono MM:78dB(EIAJ)
Power consumption 140W
Power source AC100V, 50/60Hz
Dimensions Width 430x height 125x depth of 318mm
Weight 6.4kg