PASSIVELY EQUALIZED RIAA PHONO PREAMPLIFIER. It is Only the board, which has been assembled and tested. This is the cheaper version of the successful model SPA5.The op amps are on sockets so you can be upgraded at anytime, whenever you want. 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 integrated circuit NE 5532 which can be upgraded easily. FEATURES: Supply Voltage : 2x12VAC (1.2 Watt min). Symmetrical Power Supply with low noise regulators (included). 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: 0.05%. Bandwidth: 20 to 100KHz (-3dB). Metal film Resistors 1% Vishay Capacitors 5% Very good quality PCB double Layer. DIP-8 op amp IC socket, you can easily replace the op amps. Output for LED. Dimensions (WxHxD): 9,9 X 7,3 cm. Pcb Colour: Green or Black or Blue. 5 Years Warranty. WHAT'S INCLUDED 1 x Pcb Phono preamp Internal Power Supply (Without transformer). User guide (English) 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.