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RTB11 mini hybrid low voltage hifi headphone amplifier

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This is a compact, high performance, beautiful looking headphone amplifier with unique design. Unlike other tube gadgets need high voltage, this amplifier works with only 24V power supply. A review of another proximate product can be found here:
bit.ly/pNOEXj
There're several improvments of RTB11 comparing to the product in the above review.

Please visit the following link for detail about RTB11
RTB11 mini hybrid hifi headphone amplifier
 
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