Pre Amplifier Sansui C-2301 Vintage

High-class preamplifier sold in 1984 which matches power amplifiers B-2301 and B-2201 sold in the preceding year.

First feature of C-2301 cuts off the interference between the circuit, and the influence of the flux vibrating measure is the luxurious making which goes securely, increase it is. To adopt 1 and 2 mm thick pure copperplates to the chassis, the circuit of L and R, through this pure copper chassis, to be arranged in the top and bottom, perfection it was designed to be L/R independent structure. In addition, to use the pure copperplate for also the panel of the sabot and the input/output terminal, the nonmagnetic embody chassis and the shear impedance of itself had been decreased.

Furthermore, the electrostatic shielding it did each amplifier block, with the aluminum extrusive material, we are designed to be structure, influence of the flux and the vibration was removed. As for suspension of amplifier itself vibration of baseplate itself it made the kind of structure which you hold down, it had made difficult to receive the influence of the imported vibration with interview touching bonding method. Weight of whole amplifier even in 21kg
And, influence of the vibration was removed even at the weight itself.
 

C-2301 had exhausted the x to also the part which as for resistance uses the RM-A resistance of new development extensively, raises vibration-proof characteristic with structure, those which administer the gold-plating to the brass were used in the joint. As for condensers, great pure four in each case such as electrolytic condenser, N lambda condenser, copper foil Mylar condenser and styrol condenser new development the top of the line it was. 2 it loads power transformer, as a L/R exclusive use, the core of the new structure where the leakage flux is small you had adopted.

Master volume adopts first class Detent type, the resistor evaporates in the glass epoxy baseplate, it is to administer the gold-plating to the metal membrane, also the moving contact had made 200 these multi alloy brushes. Short story with respect to luxurious glass front panel all metal it started shaving the roll knob, was. In the panel of the pure copperplate firmly the screw the pin jack which is stopped the truth of all. It started shaving from the x and with in regard to copper plating something which administers the gold-plating it was and it did.

As for balance output terminal, professional of the Swiss no chair trick corporation the worldwide top of the line of business was used. As for the circuit baseplate with the glass epoxy baseplate whose aged deterioration is little, thickness of the copper foil, normally 140-micron, there is 4-micron thickness.
 

As for circuit constitution of C-2301, equalizer-amplifier, line amplifier and balance amplifier pure A class cascade attaching push pull constitution with luxurious ones which you say, high S/N, the wide dynamic range was actualized. To increase the contact point, even in occurrence source of itself magneto striction it becomes, "relay" was removed, the signal Change-over Switch had made that uses the nonmagnetic material which administers the gold-plating.

As for power source lance Pure A class operation is supported in L/R independence fully to use large-sized ones, the rectification circuit, until the regulator everything L/R Germany it had become the luxurious constitution that stand it can point.

Because it corresponds to all MC cartridges, to load real MC boosting trance, furthermore, Low exclusive use/High private each one L/R as an independence 2 trance constitution, it had become the luxurious constitution which uses total 4 trances. It is low in the core material with distortion factor and wide band, linear in order adopts the super permalloy which has magnetic property, to prevent the unnecessary vibration, making use of the special filler, trance itself flow you had received to the case with structure.

As for basic constitution of the amplifier of C-2301, in the proud "balance amplifier", not only + side - even on side having the amplifier circuit separating signal system and the ground line completely, it eliminated the problems which originate in the ground where the ringing circuit is complete. Because it becomes, it meant that also the influence the diving and the like of the flux with the disturbance is held down to extremely little. Power amplifier of the same company Balance drive could actualize with the combination with 2301, completely from the line to the speaker with balance connection.

As for circuit constitution of C-2301, equalizer-amplifier, line amplifier and balance amplifier pure A class cascade attaching push pull constitution with luxurious ones which you say, high S/N, the wide dynamic range was actualized. To increase the contact point, even in occurrence source of itself magnetostriction it becomes, "relay" was removed, the signal Change-over Switch had made that uses the nonmagnetic material which administers the gold-plating.

As for power source lance Pure A class operation is supported in L/R independence fully to use large-sized ones, the rectification circuit, until the regulator everything L/R Germany it had become the luxurious constitution that stand it can point.

Because it corresponds to all MC cartridges, to load real MC boosting trance, furthermore, Low exclusive use/High private each one L/R as an independence 2 trance constitution, it had become the luxurious constitution which uses total 4 trances. It is low in the core material with distortion factor and wide band, linear in order adopts the super permalloy which has magnetic property, to prevent the unnecessary vibration, making use of the special filler, trance itself flow you had received to the case with structure.

As for basic constitution of the amplifier of C-2301, in the proud "balance amplifier", not only + side - even on side having the amplifier circuit separating signal system and the ground line completely, it eliminated the problems which originate in the ground where the ringing circuit is complete. Because it becomes, it meant that also the influence the diving and the like of the flux with the disturbance is held down to extremely little. Power amplifier of the same company Balance drive could actualize with the combination with 2301, completely from the line to the speaker with balance connection.


C-2301, as the control amplifier been identified, had abundant control function as an amplifier. PHONO2 with the abundant connected terminal of system, tape 3 system and 4 system of the line, furthermore, the graphic equalizer and the like the adapter edge which can be connected also the child had. Output with the output terminal of 3 system of the total of normal output 2 system and balance output 1 system, the audio cis of 3 sets could be driven. The line level amplifier to jump, furthermore with with level control source direct it loaded also function and at center position the center through balance volume etc. which does not pass for balance.

Like above, C-2301 VINTAGE was the first class control amplifier which exhausts the x to the various parts. As for the sound whose freshness is strong high, the x you think that it was the name machine.


 

Input sensitivity/impedance

PHONO -1,2 (MM) 2mV/47k Ohms.
(High MC) 2mV/100 Ohms.
(MC) 70 ÁV/3 O, 200 ÁV/30 Ohms.
TUNER, CD, LINE, TAPE, 150mV/47k Ohms.

Maximum permissible input

PHONO -1,2 (MM) 350mV (1kHz, 01% THD).
(High MC) 40mV (1kHz, 01% THD).

Output voltage/impedance

TAPE REC (PIN) 150mV/50 Ohms.
Control amplifier output (normal) 2V/50 Ohms.
(XLR-Balanced) +4 dBm.

Frequency characteristic

PHONO -1,2 (MM) 10Hz~300kHz ▒ 0.2 dB.
TUNER, CD, LINE, TAPE, DC~500kHz -3 dB.

Signal-noise ratio
(A network, short circuit)

PHONO -1,2 (MM) 90 dB.
PHONO -1,2 (MC) 80 dB.
TUNER, CD, LINE, TAPE, 110 dB.

Size

18.7" Wide, 6.3" High, 16.6" Deep.

Weight

46 lbs.