The Geekwold GK3 was provided to me by Linsoul Audio, from www.linsoul.com (Amazon store: https://goo.gl/XR2PuM). Retailing for $19.99, the GK3 is a natural replacement for Smartphone earpieces. After an initial listen, I played the GK3 continuously for 30+hrs. At the suggestion of @Kervs from Audio Buko (http://audiobuko.blogspot.com/?m=1) I switched to double flange tips from single flange. What was anemic bass turned into quite acceptable bass, with good reach up top. This little critter shows hope as a replacement to included Smartphone ear pieces.