Audio Database

B-2105  The pictorial image of MOS VINTAGE

SANSUI B-2105 MOS VINTAGE
460,000yen(1999 release)

Description
 
The model of the end in which 2SK405/2SJ115 which is Power MOS FET were carried.

The Advanced Hyper alpha-X balance circuitry developed in order to make into zero distortion of operation by transmit / amplification it1 generated at the time of a real operation is adopted.
It was considered as the closed loop through all the systems from the entry point of sound to an outlet, and operating environment which is proud of a stability is realized in the circuitry which made the driver stage the up-and-down symmetrical balance type linear current-supply-source scheme.

The input was made into the cascade of FET, the NEW diamond differential circuit which can take out - output without phase inversion was adopted, and the outstanding linearity, and momentary large powering capacity and high-speed responsibility have been acquired in accordance with the driver power-source part used as the up-and-down symmetrical balance type.

A large-sized low oscillating transformer is used for a power-source part, and it has heightened current-supply-source capacity.
Moreover, the closed-loop stream composition which carried out full independence from the grounding is adopted, there is no mixing of a grounding noise, and the clean always and stabilized large current is supplied.

The optimal weight balance is realized by adopting the strengthening twin monophonic construction which is the case design which eliminates the influence of the oscillation generated by the power supply system and a signal system from a structure side, placing a power-source part in the center of amplifier, and arranging a power unit symmetrically.
This controlled the occurrence and the propagation of the oscillation, and the image orientation and the phase response are gained by attaining shortest-ization of a circuitry.

Taking advantage of the outstanding damping characteristics, the influence on the tone which the physical properties of various oscillations and the material which are generated by the electric, mechanical operation, etc. bring the gilding pure-copper ellipse insulator which eliminates an internal interference and an extraneous vibration, and pure-copper material and a Teflon sheet by using it effectively is suppressed.

A volume has a parallel stream composition and is reducing contact resistance by half so that a sound volume can be adjusted without spoiling a music signal.
The thumb which achieved the right-and-left independency interlocks, and can control the right-and-left said level.

A gilding treatment, non-magnetic-material-izing, low-impedance-izing, high-speed-izing, and the measure against vibration proof are put into practice among parts.

Variable input (NORMAL-1, 2) and fixed input (NORMAL, BALANCED) loading.

The Switzerland Neutrik make gilding balance input terminal adoption.

The bi-wiring interconnection and the gilding speaker terminal corresponding to a banana plug made from WBT, and a gilding RCA input terminal are carried.

6N copper belt busbar adoption,

The bottom chassis is used as the pure-copper inner chassis and the W bottom chassis of a copper plating outer chassis.

The copper plating treatment of all the screws is carried out.

Black Internal
Rear
Right-and-left Part
The Power MOS FET Product
Block

Rating of a mode
Form Stereo power amplifier
Effective output (10Hz - 20kHz, both channel simultaneous operation) 150W+150W (6ohms)
110W+110W (8ohms)
THD (at the time of an effective output) 0.008% (8ohms)
Cross modulation distortion 0.008% (8ohms)
Dumping factor 200 (8ohms)
Frequency characteristic (1W) DC-300kHz and +0 -3dB
Input sensitivity/input impedance (1kHz) 1V/10kohm
SN ratio (A network, a short circuit) 110dB or more
Dynamic power 190W (6ohms)
240W (4ohms)
320W (2ohms)
エンベ lobe distortion Below a limit of measurement
TIM distortion (SWATOOTH) Below a limit of measurement
Slew rate 150v/microsec
Rise time 0.5microsec
Channel separation (1kHz) 90dB or more
Load impedance 4ohm-16ohm
Power source AC100V, 50Hz/60Hz
Power dissipation 360W
Dimensions Width 460x height 174x depth of 480mm
Weight 37.0kg