Fish Chris Posted November 24, 2008 Report Share Posted November 24, 2008 I know what hertz are, but WTF are octaves ? ......and does it matter if your box is tuned to a particular octave ? I saw it mentioned once, where it was okay to use like a 12" and a 15" subwoofer, if they were crossed over correctly, and the 12" grabbed 1 particular octave, and the 15" grabbed the next octave down. {not that I'm considering this, but just to make the point of this post clear} The thing is though, I'm pretty much clueless when it comes to "octaves" and furthermore, every box building program I've ever seen, tells you how to adjust the tuning frequency in hertz (Hz) not in octaves ? Please teach me whats up with this.... And most importantly, I guess, is tuning to a particular octave important ? Thanks, Fish Link to comment Share on other sites More sharing options...
Forevrbumpn Posted November 24, 2008 Report Share Posted November 24, 2008 usually doubling of a certain frequency 25hz- 50hz- 100hz- 200hz- 400hz- 800hz just an example Usually cars/trucks, have a resonance frequency, and also that frequency magnifies when the octave is doubled so forth for instance a small hatch back car probably has peaks at about 30hz and about 60 hz, 60 hz would be easier to produce due to the ability to double the sound waves in the same amount of space This is just a example there are also other ways Octaves work 20hz 60hz- 180hz- 540hz just an example (tripling the octave) I have a ritual called "terminator". I crouch in the shower in the "naked terminator" pose. With eyes closed I crouch for a minute and visualize either Arnie or the guy from the 2nd movie. I then start to hum the T2 theme. Slowly I rise to a standing position and open my eyes. It helps me get through my day. The only problem is if the shower curtain sticks to my terminator leg. It sorta ruins the fantasy. Link to comment Share on other sites More sharing options...
Fish Chris Posted November 24, 2008 Author Report Share Posted November 24, 2008 Right on. So then are octaves of any importance when planning a new enclosure ??? Fish Link to comment Share on other sites More sharing options...
HHR Ed Posted November 24, 2008 Report Share Posted November 24, 2008 Right on. So then are octaves of any importance when planning a new enclosure ???Fish when it comes to sub boxes dont worry about octaves. If you tune your box to peak at 40hz, one octave up is 80hz which should be filtered with a lowpass crossover anyway. and one octave down is 20hz which is the lower limit of human hearing. Octaves are important to know about when adjusting EQs, they have no bearing on box design. Ed Lester ShowtimeSPL Host Showtime Electronics Video MarketingMy old Build Loghttp://www.stevemead...08/#entry511451http://www.youtube.com/showtimespl 5 time dB Drag Finalist Last ride 2007 HHR, current dB 153.5 and bass race 149.4 dB. 153.0 dB on music New Ride, 2008 HHR SS. Build under way. Loudest score ever = 171dB 2009 dB Drag Racing, North American Points Champion Link to comment Share on other sites More sharing options...
Andrew2944r Posted November 24, 2008 Report Share Posted November 24, 2008 Fequency is important and will determine what range the box will peak at, Octave is nothing more than a note on a scale of music in a certian Key. Team Ampere Audio Link to comment Share on other sites More sharing options...
Fish Chris Posted November 24, 2008 Author Report Share Posted November 24, 2008 Right on. Thanks guys. Peace, Fish Link to comment Share on other sites More sharing options...
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