The microKEY25 from Korg is a slim, lightweight (1.43 lb), 25-Key USB powered controller with tap tempo, arpeggiator, sustain and velocity-sensitive Natural Touch mini-keys.
The HA-S is a Nutube-equipped DIY Headphone amp kit that will let you enjoy the highest quality audio anywhere. No soldering is required, so even if you are new to the world of DIY, you will be able to assemble the HA-S.