well I don't know, I always use my bass roll off for everything except bluegrass, otherwise my recordings are way too bass heavy, it may be the mics or it may be my MiniMe or it may be the combination of them, with the bass roll off engaged and my MiniMe in operation my recordings sound well balanced, you will just have to try the mics out with the roll off engaged and with it disengaged and see how differently they sound, then go with what works best, I have never used the anti attenuation feature but I think you only need to use it when you are very close to the source such as perhaps on stage recording, that's my own experience but it may differ from that of others