I bought these to produce on and they're not too bad for the job. There is a plasticity there on the mids, sounds a bit like a can at times. I guess one can learn the speaker, but I wouldn't keep as main monitors. I do drum'n'bass and need a speaker that gets filled when there's sub playing. These do it but not to the degree I would like. I believe this is due to the ports facing back. Yep, that's it. I do have the GLM correction mic and that's not the problem (barely a difference corrected or not - my room is big) . It is the sub that could be a good compliment and might show as a whole new different speaker system altogether. Mind you the speaker contains DACs ( haven't used them as of yet - I would have to lower the volume using the GLM software... )