Sansui B-2301

If the sum of the parts are greater than the total, then the total is missing something. If the total is greater than the sum of the parts, then you have a Sansui.

Huge 37kg X-Balanced powerhouse which didn't help Sansui stay afloat (but which sold very well nevertheless), the B-2301 shares the main circuit of the C-2301 preamplifier : the X-Balanced circuit where input, output, PS, NFB, current drives are all balanced.

Also used is a Diamond Differential circuit for the power stage : two pairs of pnp and npn transistors in which the differential function of the npn pair is equal to that of the pnp pair, each working as current source for the other. The differtential function allows high current-drive capacity.
Also used are floating power supply and cascode-connected p-p pre-driver stage (more about that later on).

Componentry-wise... lavish-ness :
1,3kW toroidal power transformer with six separate windings / power-supplies, 60,000µF of pre-driver caps plus 60,000µF of low-impedance "Pure Focus" power output caps, eight pairs of 150W output transistors, OFC wiring and AC cord, precision resistors, pure copper chassis, pure-copper styrene caps, copper-clad transistors, 140µ epoxy boards, (really) balanced inputs and 3µ gold plating on the s-e RCA terminals.

The high-sensivity red LCD meter is a tacky touch corresponding to the early 1980s, as seen in many contemporary amplifiers. It can be turned off.

But these are the parts only.
Great, wide, deep, moving music is the total - and it is greater than the sum of what makes it be.


Until the dedicated catalogs and great ads are scanned, you may see a real life B-2301 (and its later B-2301L sibling) at the indispensable amp8.com.