SPA-II Tube Phono pre-amp




- MM/MC
- dual mono power supply
- power supply in separate box
- four tube supply regulators
- four heater regulators
- 22 tubes
- combined active and passive RIAA equalization
- precision components in RIAA network
- designed with circuit simulation software
- wide frequency response: 20Hz - 200kHz 
- two 6C45Pi per channel input stage for low noise
- two-stage RIAA implementation amplifier
- low impedance cathode follower output  





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