Little Dot: Tube Headphone Amplifier & Pre amps: MKII Tube Amplifier $119 or MKIII MK3 Tube Amplifier $219 + free shipping By admin | March 5, 2017 4:05 am EST 0 Comment tube yummyniess Little Dot MKII MK2 6J1X2 6N6 X2 Tube Headphone Amplifier + Pre-Amplifier $119 Little Dot MKIII MK3 RTC 5654 X2 6H6PI X2 Headphone Tube Amplifier + Pre-Amplifier $219 + free shipping