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In Reply to: RE: Sealed/Open guitar cabinet? posted by BFB on August 09, 2007 at 13:19:23
Finally, someone on this forum with a sense of humor!!!Really, if you want to play guitar and be good at it, take the 20 hours you'd spend building a speaker cabinet and use it to practice your axe.
But to answer your question... the vast majority of guitar sound is at frequencies above where the difference between closed or open back is critical. If you were playing bass guitar, that'd be a whole nuther matter.
Design it closed-back, and leave the back off. If you don't like it, put the back on. In either case, pay very close attention to the cone excursion in its resonance frequency range. You don't want to break a surround or spider in the middle of a really good lick. This is the frequency range where things can get complicated, which takes us back to my original point: keep reading loudspeaker physics. :)
Edits: 08/09/07Follow Ups:
"...the vast majority of guitar sound is at frequencies above where the difference between closed or open back is critical."
Well, this I must take issue with. Anything below about 500 to 1,000Hz is affected by box loading. Also, most guitar speakers have a resonance of about 100Hz, and lots of them yield F3s a whole octave above the low E-string or whatever. (I'm not a guitarist.) My suspicion is that a sealed box will make a huge difference to the sound. I think I will make the back hinged, for both types of sound. I think the tradition of open box became popular because the vented back suits the amplifier in combos, and becasue people like the diffuse sound from the open back.
Quote: "I'm building my own guitar cabinet. Settled on a 12" Eminence driver...the Wizard, for high sensitivity and bright sound. Shall I build a sealed or open back cabinet? Aren't sealed backs louder, with more bass? Why so many open backs out there? "Quote: "Well, this I must take issue with. Anything below about 500 to 1,000Hz is affected by box loading. Also, most guitar speakers have a resonance of about 100Hz, and lots of them yield F3s a whole octave above the low E-string or whatever. (I'm not a guitarist.) My suspicion is that a sealed box will make a huge difference to the sound. I think I will make the back hinged, for both types of sound. I think the tradition of open box became popular because the vented back suits the amplifier in combos, and becasue people like the diffuse sound from the open back."
HUH. I must have missed the "I'M NOT A GUITARIST" part in your original post. And I must have missed the "I know about speaker system design and guitars" part as well.
Sorry. Didn't mean to waste your time. I thought you were building YOUR OWN GUITAR CABINET.
Another example of why pros rarely post on this forum.
Relax dude; he asked a question, it got answered.
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