The F 360 is high performance Vacuum Tube Preamplifier with a flexible electronic approach to solving multiple issues of buffering the signal/volt, controlling high and low frequencies, focusing or expanding your 3 dimensional image, and rear outputs for the option of creating an analog surround system. The letter F in the F 360 is in honor of the designer, Jim Fosgate (“Foz”). Foz’s electronic design experience and excellence spans decades and coupled with Jolida’s decades of manufacturing experience, results in a unit which can provide our client’s with a excellent sound reproduction. Frequency response front channels: + 0 -3DB 5HZ to 200KHZ (100K load), +0 -3DB 7HZ to 200KHZ (20K load). Frequency response of equalized back ambiance channels: +0 -3DB from 110HZ to 6KHZ THD Distortion: .45% @1VRMS output, .07% @ 2VRMS output, .09% @ 3VRMS output. Output impedance: 105 ohms Noise floor front channels: -81DB unweighted, -92DB A weighted. Noise floor back and sub out channels: -70DB unweighted, -90DB A weighted. Front Channel signal to noise ratio: over 100DB @ 3VRMS out A weighted. Back channel signal to noise ratio: over 100DB @ 3VRMS out A weighted. Max output voltage: 13V RMS front channels, 8.5V RMS back and sub channels. Dimension control range: -7 DB clockwise and counter clockwise.