Features:<br> <br> Low noise integrated circuits and high quality components convert phonograph signals to line level signals to eliminate low frequency noise and ensure clear sound quality.<br> <br> Protect your turntable with a grounded column design. Three switchable gain modes: 39, 42, 45dB. Adjustable gain levels give you customizable control and superior compatibility.<br> <br> Entry level high end sound and top of line circuitry for unmatch low cost.<br> <br> Tubular preamplifier: It is also a tubular preamplifier with a 3.5mm input.<br> <br> High quality components. The is smooth. Apply vacuum tube type: 6J2/6K4/6J1/6J4/GE5654/6AK5, etc. You can replace the vacuum tube to DIY your stereo system. Different tubes have different sounds.<br> <br> <br> <br> Specifications:<br> <br> Material: Aluminum Alloy<br> <br> Power adapter output: 12V/1.5A<br> <br> Product adapter input voltage range: 110V-240VAC<br> <br> Phono preamplifier Dinput voltage: 12VDC<br> <br> Output voltage level: 600Mv@3mV 1kHz<br> <br> SNR: 98dB<br> <br> Frequency response: Standard RIAA<br> <br> Type: 1/2/3/4<br> <br> <br> <br> Note:<br> <br> It is only a preamplifier, not an amplifier, and cannot be connected directly to a passive speaker. If you need to connect it to a passive speaker, you'll need to connect it to an amp, and then connect the amp to your passive speaker.<br> <br> Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order.<br> <br> Due to the difference between different monitors, the picture may not reflect the actual color of the item.<br> <br> <br> <br> Package includes:<br> <br> 1x Preamplifier<br> <br> 2x Vacuum Tube<br> <br> 1x DC12V Power Adapter<br> <br> 1x Manual<br> <br> 1x Cable