AYA Audio Nightingale YK-1: Twinkle little star What are the countries that first came to mind when thinking about IEM manufacturing? Most likely it would be China, USA, or Japan. Though China brands are particularly taking the lead in affordable or cost-effective IEMs, prompting many other manufacturers to work on affordable products. This ongoing trend led manufacturers from other countries to build solid reputations, one of them being AYA Audio from Vietnam.      AYA Audio is an affiliated company … Continue reading AYA Audio Nightingale Review: Twinkle little star