PASSIVE RIAA PHONO PREAMPLIFIER. It is Only the board, which has been assembled and tested. It is a Hi-Fi turntable phono pre-amplifier that allows you to connect low signal output turntables, magnetic cartridges to an amplifier, or sound mixer that has normal stereo line level inputs (100-300mV). You can use this VERY good quality PASSIVELY RIAA equalised pre amp without signal loss or distortion and avoid to buy expensive sound amplifier or sound mixer. You can connect it to the sound card of your computer and convert your old records in mp3. It is made with the famous integrated circuit LME49720 or LM4562NA, which has SPECIAL features like: Distortion: 0.00003% Input Noise Density: 2.7nV/?Hz Slew Rate: 20V/?s. Gain Bandwith Product: 55MHz FEATURES: Supply Voltage : 2X12VAC/2W Symmetrical Power Supply with low noise regulators. Input Impedance: 47 Kohms at 1kHz. Output Impedance: 47 Kohms (600 ? min). Input sensitivity: 2-3mV. Output: 300mV (1.8V max). Gain: 40db S/N ratio: 85db. RIAA Accuracy: 1dB. Frequency Response: 20Hz to 20kHz +/- 0.5db. THD: 0.002%. Bandwidth: 20 to 100KHz (-3dB). Metal film Resistors 1% Polypropylene capacitors 2.5% -5% (special for audio) Very good quality PCB double Layer. Ultra low noise and low distortion audio OP AMP LM4562 or LME49720. Dimensions (WxHxD): 9,7 X 7,3 X 2,2 cm. Colour: Black or Green. 5 Years Warranty. WHAT'S INCLUDED 1 x Pcb Phono preamp Internal Power Supply. User guide. Business seller information: S.P.C Electronics. Spyros Papakonstantinou. Paparigopoulou 20 Str. 8046 Paphos. Cyprus. Value Added Tax Number: CY 90005904X I provide invoices with VAT separately displayed.