| Place of Origin: | China (Mainland) |
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| Type: | Professional Amplifier |
| Model Number: | 728A |
| Brand Name: | XiangSheng |
| 728A Vacuum Tube: | Hi-end Tube Headphone Pre-Amplifier |
Quick Details
Specifications
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model |
XiangSheng 728A Vacuum Tube Hi-end Tube Headphone Pre-Amplifier BK 110v-230v |
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Specifications
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Output impedance:600 ohm Total hamonic distortion: less than 0.01% Frequeney responses:20Hz-30Khz+-1db Signal to noise Ratio:90db Input jack:4groups Output jack:2groups Supply votage:AC110/220V 60hz/50hz Size:435*90*290mm
Used tubes:12AT7*2,12AU7*2,6Z4*2 Working environment:Temperature:5-40degree Humidity:35%-80%
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Features: |
The function and appearance of this unit now are perfect after going through improvements for several times. 1) The pre-amplifier improved based on famous Wada,Shigeho's style Electric circuit,which was introduced by wada shigeho in the early 1960s and gave an excellent performance. 2)Using the entire circuit board design ,internal layout is more rational and refined . 3)Brushed aluminum (8mm thickness)silver faceplate,with all metal buttons and knobs ,plus blue LED indicator light and unique tubes display window. 4)(2) groups of RCA outputs:one with low impedance output and one with high impedance output ,the unit not only can be connected to power amplifier as a pre amplifier ,but also can be connected to integrated amplifier as a timbre regulator and improve the sound quality of whole system. 5)R-shape high efficiency transformer and gold coated RCA connectors plus outputs terminals. 6)Adopt 4pcs of paper in oil capacitors and German WIMA capacitors for coupling effect,make the sound warm and more details 7)All resistors and capacitors are audiophile grade to ensure sound quality. 8)The unit have Bass and Treble Controls and Volume,Balance adjustment on it plus tone bypass function,it bypasses the treble and bass controls,so you get a more " neutral" and original sound.
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