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Върхов модел предусилвател TECHNICS SU-A4-отлично техническо съктояние,липсва капачето на корекциите-350лв.


Повече данни:
http://www.audio-extasa.eu/technics-sua4-dc-control-amplifier-p-1206.html
http://www.hifi-wiki.de/index.php/Technics_SU-A_4


Technics SU-A4
200,000yen(around the 1980 time)2000DM

Description
　
Stereo DC control amplifier which adopted the whole page first class amplification.

Circuitry has composition which added perfect DC amplifier (flat amplifier and buffer amplifier) to MC pre preamplifier of interrupt control logic, and the phone equalizer of interrupt control logic.
DC amplifier is a signal path and perfect DC amplifier which includeds no capacitor in NFB, uses an input stage as the Dual-FET differential amplification, cascode, and Current-mirror load intensity to which the property was equal, and is considering it as a two-step stream composition with a SEPP output stage.
The output transistor has adopted SLPT of high ft and is attaining a Low-noise-izing and wide & flattening of the frequency characteristic.

FET4 Para of a super-low-noise [ preamplifier / MC pre ] and a phone equalizer have realized interrupt-control-logic-ization by the input stage of the differential-amplification cascode Current-mirror load intensity by the super low-noise and a Dual FET.


A 0.2-ohm low-power-output impedance is realized by DC buffer amplifier adoption.

The super base which can carry out the a maximum of 1 oct growth of the frequency response of a speaker to low-pass is carried by the shelving tone with the steep riser of 12 dB/oct, and the amount of boosts of a maximum of 12dB. The turnover can change continuously to 50Hz - 200Hz.

The super treble of the treble control of the turnover 2kHz maximum variation of ±5dB and the 8kHz maximum variation of ±10dB is carried.

The 4-unit volume which uses a conductive plastics is adopted as a volume.


Rating of a mode
Form Stereo DC control amplifier
Input sensitivity/impedance Phono1, 2 man-month:2.5mV /, 47kohm
Phono1 MC: 100 microvolts/47 ohms
Tuner, Aux, Tape:150mV /, 47kohm
THD (20Hz - 20kHz) Tuner, Aux, Tape, Phono man month, MC: 0.001% (VR max, 5Voutput)
0.001% (VR-30dB, 1Voutput)
SN ratio (IHF-A) Phono MM:90dB
Phono MC: 78dB (250-microvolt input)
Tuner, Aux, Tape: 105dB
Frequency characteristic Phono man month: 20Hz - 100kHz, RIAA±0.2dB
Phono MC/man month: 20Hz-20kHz, RIAA±0.15dB
Tuner, Aux, and Tape:DC-20kHz+0 -0.1 dB
DC-400kHz+0 -3dB
Maximum permissible input (1kHz, RMS) Phono MM:300mV
Phono MC:12mV
Shelving tone super bass: ±5dB (20Hz)
bass: ±5dB (50Hz)
treble: ±10dB (20kHz)
super treble: ±10dB (50kHz)
12 dB/oct: 0dB-12dB
Turnover frequency super bass(12 dB/oct): 50Hz - a 20Hz succession variable
bass:500Hz
treble:2kHz
super treble:8kHz
Light filter EQ subsonic speed: 20Hz-12dB / oct
Loudness control
(VR-30dB) : with a turnover frequency of 250Hz +8dB (25Hz)
: with a turnover frequency of 500Hz +8dB (50Hz)
An Output voltage/impedance rec out: 150mV/500 ohms
pre out: 1V/0.2 ohm
Pre-out maximum output voltage 15V
Power-switch interlock AC outlet The maximum supply voltage: 600W
Power source AC100V, 50Hz/60Hz
Power consumption 65W
Dimensions Width 430x height 97x depth of 360mm
Weight 8.8kg





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Райчев
Пловдив "Гладстон" 11
http://raichevaudio.wordpress.com/

[Филипов]

Да вземеш да попрестанеш с флуда? Никой не го е еня за колко са се продавали боклуците ти преди повече от 30 години.
То тогава една София81 беше 1500 лева (6-8 средни заплати), дори и руски гълъбарник беше 1000 +/-50. Може да се пробваш сега за колко ще ги продадеш.
_________________
Ако двамата имаме по една ябълка и ги разменим, пак ще имаме по една.
Ако двамата имаме по една идея и ги разменим, ще имаме по две!
Oтопление и ВиК. Интелигентни отплителни системи. Проектиране продажба доставка монтаж