Technics SU-A200

Commentary

This control amplifier is designed for higher quality reproduction and power amplifier drive by adopting ClassAA method for equalization amplifier and output amplifier.

The phono equalizer amplifier uses the ClassAA method.
The SEPP output stage current drive amplifier with high current supply capability eliminates the adverse effect of the impedance fluctuation of the RIAA element on the output current, and realizes voltage amplification in an ideal A-class state. It also realizes ultra-low distortion by combining with dual ultra-low noise FET differential amplification and the first stage high current rate circuit configuration with cascode.

The ClassAA method is also adopted for the output-amplifier section, making it possible to reproduce A-class low-distortion high-definition images without being affected by the load state caused by the input impedance or connection code of the power amplifier, which occurs in the output-section of the conventional control amplifier.

Newly developed 4-row configuration wide D-range volume is used.
This volume achieves low distortion and low noise by using a new resistor with a smooth mirror surface and a gold-plated multi-contact brush. In addition, the SN ratio in actual use has been greatly improved by using a new circuit that operates two of the four volumes as gain control of the output amplifier.

A newly developed active servo power supply is used for the power supply.
This power supply forms a feedback circuit by combining a constant-voltage IC dedicated to the power supply with excellent temperature stability and a wide-band IC with excellent high-frequency characteristics. This power supply realizes excellent regulation exceeding that of car batteries and low noise in a wide frequency range. In addition, by adopting a line filter for electromagnetic interference, power supply noise that may flow from the primary power supply line is suppressed.
In addition, the power supply for the audio signal and the power supply for the video signal are independent power supplies with separate windings, and the ground line is completely separated to eliminate adverse effects caused by mutual interference.

In addition to eight audio inputs, it is equipped with an AV input Route 3 + VTR input / output system that allows simultaneous selection of video signals, and two audio outputs (front and rear) and one video monitor output system.

Equipped with CD / digital direct function.
When this function is used, the input signal is directly connected to the volume via the gold contact (direct switch) only.

The selector can select sound and image independently, and it is also possible to produce BGV.
In addition, a newly developed microprocessor and electronic selector are used to control the audio signal without degradation.

Model Rating

Type	Stereo control amplifier
<Audio section>
Input Sensitivity / Impedance	Phono1, 2 mm : 2.5mV/47k Ω Phono1, 2 mc : 100 μ V/220 Ω Tuner, CD, AUX, AV1/TV, AV2, digital Tape1, Tape2/VCR, Tape3/DA tape : 150mV/39k Ω Direct-CD, digital : 150mV/15k Ω
Distortion Factor (20 Hz to 20 kHz)	Phono1, 2 mm : 0.0008% (EIAJ) Phono1, 2 mc : 0.0009% (EIAJ) Tuner, CD, AUX, AV1/TV, AV2, digital Tape1, Tape2/VCR, Tape3/DA tape : 0.0007% Direct-CD, digital : 0.0006%
Signal-to-noise ratio	Phono1, 2 mm : 92dB(IHF'66) 87dB(EIAJ) Phono1, 2 mc : 76 dB (IHF' 66, 250 μ V) 81dB(EIAJ) Tuner, CD, AUX, AV1/TV, AV2, digital, Tape1, Tape2/VCR, Tape3/DA tape : 109dB(IHF'66)/100dB(EIAJ) Direct-CD, digital : 110dB(IHF'66) 100dB(EIAJ)
Frequency characteristic	Phono1, 2 mm : 20 Hz to 20 kHz RIAA ± 0.2 dB 20 Hz to 100 kHz RIAA ± 0.5 dB Tuner, CD, AUX, AV1/TV, AV2, digital, Tape1, Tape2/VCR, Tape3/DA tape : 0.5 Hz ~ 150 kHz + 0 -3dB/20Hz ~ 20 kHz + 0 -0.1 dB Direct-CD, digital : 0.5 Hz ~ 150 kHz + 0 -3dB
Phono maximum allowable input	MM:160mV MC:6.4mV
Subsonic filter	20 Hz, -12dB/oct.
High filter	7 kHz, -6dB/oct.
Audio Muting	-20dB
Output Voltage / Impedance	Pre Out (front/rear) : 2V/2 Ω (rating), 8V/2 Ω (maximum) Rec Out:150mV
Video Signal Unit (AV1/TV, AV2, tape2/VCR)
Output signal level	1 ± 0.1Vp-p (1Vp-p/75 Ω Unbalanced Input)
Signal acceptance input	1.5Vp-p
Input-output impedance	75 Ω unbalance
Adaptive input / output impedance	75 Ω unbalance
<General>
Power consumption	15W
Pwer	100 VAC, 50/60Hz
External dimensions	Width 476x Height 125x Depth 360 mm
Weight	10.4kg