Hi there - I recently purchased a cheap 100watt stereo power amp from maplins for use in my guitar rack system(I got fed up of lugging my 20kg tube power amp around!!) . Unfortunatley my poweramp has 4ohm stereo speakers outputs and my speaker cabinet loads at 16ohm when wired in stereo. I have read that this is considered a safe impedance mismatch when using solid state amps but it will have some adverse effects, with lowered output volumes and there will be some high end frequency cut. Should I be concerned about this? 4ohm into 16ohm seems like quite a big mismatch and I know if I connect my cabinet in mono then the cabinet impedance drops to 8ohm. This would obviously mean connecting only 1 output of the poweramp and having one output totally unloaded which iam pretty sure will be unsafe even if I turned the power volume to 0 for that channel. Does anyone know if this is definatley the case? Thanks for taking the time to read my post - and thanks in advance for any help! Mike!