The Micro 25 is a purist, hand-built design featuring all point-to-point wiring and a hand built high quality MM phono stage that offers great sound and incredible value. It uses 3 x 12AX7 tubes and has three line level inputs and one MM phono input. Frequency response is 20 Hz - 20kHz +/- 0.5 dB on Phono and 0.1 - 200kHz -1 dB into 100 kOhms on Line input. Sensitivity is 1mV rms for 0.5 rms output on Phono and 150mV rms for 0.5 rms output Line. Input Impeadance is 47kOhm Phono and 100kOhm Line. Output Impedance < 300 ohms.