I'm wondering what key people work in and what they consider to be the lowest frequency that they can utilize. Any good club/rave system worth a damn should be able to broadcast 40Hz, that's just below the "lowest" F. So I used to go down there. Lately I've been staying up above working in A minor or even Bb cause it's more satisfying for your average listening experience especially for people using earbuds, heaven forbid. Personally I'd love to go lower and lower though...I want to build these subs for the parties we throw around here that can manage 30Hz (see Bill Fitzmaurice's Tuba 60s). And my "monitoring system" can hit 35Hz not to mention that headphones can often push out 25Hz. What's your thoughts? Keeping in mind that if you bounce a track above 180BPM it could get pitched down by a DJ, you bounce it at 165BPM it'll definitely be heard higher in a live set. Some of you know pros, what do they have to say about it? - J.P.