We recommend them highly when used with a portable player and headphone amp .
我们给予他很高的评价是在便携设备加上耳放的情况下。
I can say with high confidence ( but not positive ) that there is no other SS headphone amp of this caliber ( even though many come close ) .
我很大信心（但不是肯定）说这是没有其他晶体管耳机放大器可以达到（即使只是接近）。
headphone ampheadphone ampheadphone amp