Description

SSA-350 Mono block amplifier circuitry is a hybrid design, designed to deliver exceptional sound to difficult loads. Using both tube and solid state circuits combines virtues of both technologies to achieve the end result.

Tube rectification (GZ32 NOS) and Tube single ended input stage (6J5 NOS) driving an ultra linear solid state stage and solid state current amplifier. 

2 separate Linear Power supplies are used to supply the required voltages. 

First power supply is using a custom designed EI, low loss lamination transformer to deliver voltages required by both Rectifier and Signal tubes. A specifically designed choke using TLA’s technic is filtering the High Voltage for the tube front stage.   

The second power supply is using a unique custom designed UI, low loss lamination transformer. Combined with high speed rectification and quality filter capacitors delivers dual polarity voltage and high current needed for the solid state and output sections. 

The audio signal is connected directly to an 6J5 tube front stage supplied by its dedicated power supply.

Ultra linear solid state circuitry takes over further amplification of the signal and delivers the signal to current amplifier circuit that delivers the power to the load. Only bipolar transistors are used in the circuit. Semiconductors as well as resistors and capacitors are closely matched.

 High quality copper, film capacitors in the signal path.

A Mosfet protection circuit is used to connect the load to the amplifier. After power up the protection circuit will wait aprx 13 sec before connecting the amp to the speaker, giving time to the tube heaters to warm up. 

DC fault protection and high temp protection.

High quality PCBs. All boards are hand assembled. All parts of the amplifier are hand wired.   

Highest quality components are used throughout the circuit. Each component is handpicked, tested and matched to serve the design.

NOS tubes are used. 

Heat Sink is machined from Solid Aluminum and is an essential part of the vibration damping mechanism. 

SSA-350 is designed keeping in mind that for a lot of speakers the actual impedance for some frequencies is well below their ‘nominal’ impedance. 

Technical Information