The AER Compact 60/4 has proven that there is an all-round, small, powerful and yet simple-to-use complete solution for stage, studio and home use that works up to the highest demands and standards of acoustic players.New features at a glance:Auxiliary Input: Allowing the connection of line-level sources (e.g. phone, mixer, CD player) via the 3.5mm jack socket (mono or stereo) which can be mixed in with channel 1 & 2 using the 'aux level' control.DI Out Pre/Post FX: D.I. Output is a balanced, non-isolated XLR output, post tone and now is switchable pre or post effects.9V Phantom Power (ch. 1): The 9V phantom power supplies instruments preamps with power (instead of battery) that are prepared accordingly. Such preamps must be connected to input 1 by a stereo jack cable. The yellow indicator lamp lights up when power is being supplied. Sources that don't require phantom power should always be connected via a mono jack cable.Quality gig bag included