MM phono stage of PM-13 and PM-11 is the same, two single stage JFET gain stages with a passive RIAA equalization stage between them and no negative feedback. PM-13 adds a Amorphous core step-up transformer Moving Coil Pre-Preamp. It not only low noise but also is suitable for most low-output MC cartridge.It’s power supply is battery (with charger).
BPS(The battery power supply with charger):
BPS uses NiMH batteries provide DC24V output.It has automatically charging function.
When the battery voltage fall down to 20V，it will be charged automatically. It still provide DC24V output through the power transformer, until the battery is full, BPS will disconnect the transformer, continue to use battery.