eh I don't know. That whole frequency response thing is a marketing hype. For one thing, everyone's ears have a different frequency response so what sounds good for you may not sound good for me. Just make some compromises and output a decent mix. Unless you are at the professional level, there's no point in buying flatline monitors. Story short, it is not a huge difference. I mean the grados sound perfect, but it's not like the radioshacks sound bad.