Unlike line level audio sources you connect to a stereo (DVD/CD players, tape decks, TV audio, minidisc, etc.), the output from a magnetic cartridge installed in a good qualityturntable is MUCH lower, and requires an additional stage ofamplification to bring it up to the same volume as the othersources you listen to through your stereo. This additional amp stage, the phono preamp, is built-in to most older receivers and amps, allowing direct connection of a turntable. However, newer stereo equipment (including virtually all mini-systems and home theatre units, as well as many stereo receivers and amps), do not have a phono input (this is because records and turntables are supposedlyobsolete in today’s world dominated by CDs and DVDs). In order to utilise the inputs that such units have (Aux, Tape, Line, Video, CD, etc.) to connect a turntable, you need to first pass the signal thru an external phono preamp to bump the level. The same level increase is needed if you’re connecting a turntable to a computer sound card’s line input so you can make CD-Rs from LPs; again, the external phono preamp provides it

Features:

Ultra compact design
Use either 9V Battery (not included) or 9V - 500maH power supply with 3.5mm jack connector (not included)
Simply plug and play
Dimensions:
86 x 28 x 70mm (WHD)
Connections:

Audio Input: 2x RCA L&R
Audio Output: 2x RCA L&R
Power Input: 3.5mm (Requires sm905 and PW8030 - not inc) and 9V battery
Specifications:

Current consumption: 1mA (average)
Est running time on 9V battery is 40hr continuous (based on 20mA)
Amplification: 34dB
Input impedance: 50 k?
Output impedance: 50 k?
Frequency Range: 30 Hz ~ 20 KHz
Compensation: RIAA correction