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Old 09-12-2007, 10:56 AM
Bob Branstetter Bob Branstetter is offline
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I agree with you on the Top thing to a point but when listening to Basses I often hear more sound on some of them from the Back than from the Top standing close to the Bass.

I think that some Basses can be dampened more easily as they may have less sound to put out to begin with. On the other hand, many of the Basses I have are so powerful in comparison, I rarely hear the other Basses around me in the section. In that case, even if objects do dampen the Bass, it is no great loss to be noticed.
Actually, I was thinking of the muting effect from the mass of the mic & foam rather than the amount of sound radiated by the instrument. However, measuring the relative amount of sound radiated from the back, sides and top is quite easy. A simple $30 Radio Shack ****og volume meter works quite nicely. That's what I use to determine the A0 frequency inside the bass. I bought it originally for setting up my home surround sound system.
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Old 09-12-2007, 11:05 AM
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Originally Posted by Bob Branstetter View Post
Actually, I was thinking of the muting effect from the mass of the mic & foam rather than the amount of sound radiated by the instrument. However, measuring the relative amount of sound radiated from the back, sides and top is quite easy. A simple $30 Radio Shack ****og volume meter works quite nicely. That's what I use to determine the A0 frequency inside the bass. I bought it originally for setting up my home surround sound system.
Bob, you can ABC my Basses anytime you like. I don't personally buy into that theory mainly because I am clueless about it. Changing strings for me has made more differences than just about any type of adjustments have.

Maybe it also depends on the grade of Bass too. You think?
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Old 09-12-2007, 09:42 PM
Bob Branstetter Bob Branstetter is offline
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Bob, you can ABC my Basses anytime you like. I don't personally buy into that theory mainly because I am clueless about it. Changing strings for me has made more differences than just about any type of adjustments have.

Maybe it also depends on the grade of Bass too. You think?
What theory? That a Radio Shack volume meter will allow you to determine the relative amount of sound coming from the back, front, ribs or any other part of your bass? The only thing I said was the I use it (the Radio Shack ****og volume meter) to determine the A0 frequency (by measuring the volume) inside the bass. No theory here either, just the fact that I find this inexpensive volume meter quite useful for lots of things. It's also a fact, not theory, that I used it to setup my home surround system, which I might add sounded quite good after making the adjustments to the individual spreaker channels.

I assume that you were jumping to a conclusion that this had something to do with A0-B0 matching. No, I gave up trying to convice you of the merits of that and other well documented proceedures that I use a long time ago.
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Old 09-12-2007, 10:56 PM
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Originally Posted by Bob Branstetter View Post
What theory? That a Radio Shack volume meter will allow you to determine the relative amount of sound coming from the back, front, ribs or any other part of your bass? The only thing I said was the I use it (the Radio Shack ****og volume meter) to determine the A0 frequency (by measuring the volume) inside the bass. No theory here either, just the fact that I find this inexpensive volume meter quite useful for lots of things. It's also a fact, not theory, that I used it to setup my home surround system, which I might add sounded quite good after making the adjustments to the individual speaker channels.

I assume that you were jumping to a conclusion that this had something to do with A0-B0 matching. No, I gave up trying to convince you of the merits of that and other well documented procedures that I use a long time ago.
Ok Bob, sry.. My bad.. I mis-read your Post. For judging the volume of the Top or Back or whatever, I just use my ears. I don't know what measuring them could do if that's how the Bass just is. On the AO/BO thing, I'm more of a 'see it' kinda guy than a 'read about it' person. I need to experience things for myself before I tinker with things. The A-B thing is for another thread some place else on the Forum so we will leave it at that. I know we did this over on TB before but I would welcome the open type discussion of it if you are willing to start it up again over on the Luthiers section here.
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Old 09-13-2007, 03:49 PM
Bob Branstetter Bob Branstetter is offline
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Ok Bob, sry.. My bad.. I mis-read your Post. For judging the volume of the Top or Back or whatever, I just use my ears. I don't know what measuring them could do if that's how the Bass just is. On the AO/BO thing, I'm more of a 'see it' kinda guy than a 'read about it' person. I need to experience things for myself before I tinker with things. The A-B thing is for another thread some place else on the Forum so we will leave it at that. I know we did this over on TB before but I would welcome the open type discussion of it if you are willing to start it up again over on the Luthiers section here.
Thanks for the offer on A0-B0 Ken, but I got my fill of discussing it over on the TalkBass Forum. It was unfortunate that none of the luthiers over there were unwilling to seriously look into it and try it for themselves, preferring to declare it bogus and putting me in an adversary role defending the concept. I can only say that I have used the process successfully on many basses and believe that it is tool that should be in every luthier's shop. After going through that rather unpleasant experience on TalkBass, I made a personal decision that I will not discuss it any longer on any forum or Internet discussion group. However, I am always available to answer legitimate questions from anyone who is truly interested in trying A0-B0 matching by email or PM. I have sent out many copies of my 1996 Michigan Violin Makers Assn Paper on A0-B0 matching in basses to interested individuals as email attachments. The same offer also applies to questions about the Vibration DeDamping process which we briefly touched on in an earlier thread on this forum.
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Old 09-13-2007, 04:05 PM
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Originally Posted by Bob Branstetter View Post
Thanks for the offer on A0-B0 Ken, but I got my fill of discussing it over on the TalkBass Forum. It was unfortunate that none of the luthiers over there were unwilling to seriously look into it and try it for themselves, preferring to declare it bogus and putting me in an adversary role defending the concept. I can only say that I have used the process successfully on many basses and believe that it is tool that should be in every luthier's shop. After going through that rather unpleasant experience on TalkBass, I made a personal decision that I will not discuss it any longer on any forum or Internet discussion group. However, I am always available to answer legitimate questions from anyone who is truly interested in trying A0-B0 matching by email or PM. I have sent out many copies of my 1996 Michigan Violin Makers Assn Paper on A0-B0 matching in basses to interested individuals as email attachments. The same offer also applies to questions about the Vibration DeDamping process which we briefly touched on in an earlier thread on this forum.
Ok, on that note, I would like to have one of each for my reading and files. I am sure there is something to gain there if one makes the effort. I on the other hand have been fortunate enough to choose Basses that need very little help other then the obvious repairs needed. Maybe I have done some matching on my own but didn't know I was doing it. I have set-up and improved quite a few basses in my time going by just feel. It would be good to see this in print. Maybe some others here would try this and discuss their results and that way we could have an A/B forum that you might, just might visit on occasion and give a shout once in a while.. That would be nice.
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Old 09-13-2007, 09:20 PM
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What is AO-BO and the difference related to? I gather that it's to do with volume output, but can you give us a layman's interpretation?
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