Blackstar Fly 103 (losse box) Combine the FLY 3 with this FLY 103 extension cabinet to create a 6 watt guitar amp setup which creates a stereo effect when playing your guitar or listening to your favourite tunes. Perfect for use with your computer and any other device capable of being connected via the FLY 3’s MP3 / LINE IN jack. Let the sound from the FLY 3 and FLY 103 surround you as you surf the web! The stereo setup of the FLY 3 and FLY 103 also sounds great when used with your guitar – you can also jam along to your favourite tracks in stereo when plugging an MP3 player, phone, laptop, tablet, etc. to the FLY 3. Using both the FLY 3 and FLY 103 in conjunction means you have a great sounding stereo mini guitar amp to sit and practice with while jamming to tracks.