1.It uses PCB layout which is identical with Beyer Dynamic A1 and 99% same components. All components are supplied by trustworthy and professional component suppliers.
2.It uses high-quality aluminous enclosure, silkscreen technics and normative and compact design. The enclosure has not only beautiful appearance, but quite excellent heat-sinking capability. The aluminous enclosure, about 1 KG, has a large heat-sinking area.
3.It uses UPC1237+Omron relay as earphone time-delay protection circuit. Signal output of A1 also uses omron relay, but has not earphone protection function. So it is more outstanding and practical than original engine.
4.Signal noise ratio is optimized and has no noise when connected with sound source.
5.The machine comes with power line.
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