First time purchasing a studio monitors. I have seen that (in the paper) the main difference is the range of frequencies they can play. Examples: 1) Mackie HS624MK2: 45 Hz - 6 Khz 2) Mackie MR5: 60 Hz - 20 Khz (± 3dB) 2) Yamaha HS80M: 42 Hz - 20 Khz (-10 dB) What does this numbers really mean? What is the lowest frequency that I would need to reproduce? I only create backing tracks for my saxophone, and I think the lower frequencies would be for the basses, but I do not know what is the lower frequency that a bass can play in. Most of times, I get a midi and use VST sounds to create the final backing track (I use Cubase 5). My style is Smooth Jazz, Blues, Traditional Jazz and Love Pop songs. Any idea about this numbers or aditional data that I need to underestand and analyze about a studio monitors, is WELLCOME!