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Details：
Work voltage： AC115V or AC230V optional Color:full black Net weight:4.65KG Support 4 way stereo audio inputs + one way output With remote control: Power on/off choose input Adjust volume Mute Using 3 pcs Shuguang 12AX7B tubes Hi end Oxygen-free copper R-core transformer Taiwan high quality frosted Pure copper RCA terminals. Full aluminum chassis This preamp is reference the famous Marantz 7 Circuit ,The carefully tuned M7 is very comprehensive and dynamic. The human voice is natural and delicate, the strings are smooth, stretched, and the positioning and imaging are excellent. The high and low frequencies are extended in place, and the low frequencies dive deep and powerful without lack of flexibility. There are many tube preamp on the Internet design is not very reasonable. The main manifestation is that the distance between the ubes is too close. ZERO-ZONE suggests that the distance between the center of each is greater than 40mm.
Parameter：
● Gain: about 10 times. ● input impedance:47K ● SNR: 90dB; ● Frequency response: 10Hz--30KHz; ● Distortion: ≤1%. ● Size:320*92*308MM (W*H*D) expect RCA and knob
Remote control volume control board:
128-level relay pure resistance shunt control The input and output impedance is constant, the step is 0.5db, and the total attenuation is 63.5dB. The resistance adopts American DALE/VISHAY precision resistance 4 ways audio input options 1 way audio output Remote control function: Power on/off Input choose Adjust volume Mute Memory One key return Encoder function: Press the power switch on the left encoder, and rotate the audio input left and right. Press the right encoder to mute, and rotate the volume left and right. Resistance:default 50K，can provide 100K,if need ,pls add a note !
Package include:
Finished M7 preamplifier x 1 Remote x 1 (no battery) Not included AC power cord
About Us :
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