Tailpiece/Bridge distance

there is no "right" length. The distance between the tailpiece and bridge will determine the tension on the strings, and some guys tune that lenght of string also to increase or decrease certain resonances on the instrument to make it sound better. You can play around with the length and see if it makes your bass sound better...

 

i had a conversation last night with a fellow bassist which raised some questions that seem related to toman's response in the previous post. my understanding of string tension was, as we've talked about here several times before, that it is a constant for a given set of strings at a given string length, regardless of breakover angle at the bridge. however, i am now wondering what part in the equation afterlength plays.

perhaps we've gone over this already and i missed it, but will altering the length of the string afterlength (tailpiece side) affect the perceived tension of a string? my friend asserted that longer string afterlengths result in higher perceived tension on the string playing length. likewise lower perceived tension follows shorter afterlength. he said that by increasing string afterlengths on the lower-pitched strings one can cause the playing length to be less floppy (i guess this could be a problem - i've never had it). is this correct? if so, what are some practical applications?

is this part of the theory behind compensated tailpieces (mike?)?

sean p

 

The bridge position is obviously a constant, as it should be in line with the F hole nicks, so what are you suggesting? That one has a variety of different tailpieces and tailpiece wires to experiment with?

 

The significant measurement is not the distance from the bridge to the tailpiece. What matters is the pitch of that section of the string. The pitch should be higher than the played portion of the string by precisely an octave and a fourth. Precisely. Unless it should be an octave and a third, precisely. Or maybe it should be a fifth. Hmmm. You can probably find vociferous advocates of any of those. There are other consequences that I'll leave for Arnold or somebody to explain. They are all variables without hard and fast rules. Dealing with them is what transforms luthiers from mechanics to magicians right before your eyes.

 

yes, i suppose that's the idea, though i'm not advocating going out and getting five tailpieces to experiment with. i was hoping someone with some physics know-how could weigh in here. i'm trying to determine what the effect of aftgerlength is on perceived playing length tension.

note: this isn't a question of what makes for optimum tone - overtones/harmonics in the afterlength are not my interest in this case. i'm only interested in the effect on feel.

sean p

 

Sean, check out David Gage's article in this months Bass Player magazine. He addresses most of the issues raised in this thread. He seems to think that the added length does contribute to a "feel" of less tension on the playable portion of the string that does have increased afterlength. He also addresses the function/effect of tailpiece cords/wire/hangers.

 

I've heard different views from players. Some say, am I saying this right(?) and octave and a 10th above the open string tone...or more.
A soundpost that's too long can also affect the tension, at least it can make them feel a lot tighter.

 

thanks, mike! i don't normally check out bp magazine, so i appreciate the heads up!

sean p

 

No.
The tailpiece distance is adjustable by altering the length of the cable that secures it to the endpin housing.

 

looking at pics of mike pecanic's adjustable tailpieces it appears that there are 'sliders' under each string that could adjust the individual string afterlengths while allowing the length of cable from the endpin to remain the same. i wonder if there's a difference in string feel (sound aside) with a slider all the way 'up' or 'down?'

sean p

 

If you haven't already, shoot MIKE AND THE MECHANICS tailpieces an email. He was very good about responding to several questions I had.

 

Chris,
That feeling of tension can result from the bridge to tailpiece string length. Also, a post that is too tight, bridge too high, nut too high and too much scoop in the board...also type of strings.
And not practicing enough.

 

When I had my MPM Tailpiece put on my Bass I also had my Strings changed also. Dr. Mike recommended Spiro`s but I was hesitant from the feedback I`ve gotten here at TB about there Bowability "is that a word". Anyway I went ahead and ordered a set of Spiro Med Reds to replace my Oblagatos"sp?". When I got my Bass back I did notice a Big change. I dont know if its the Tailpiece or what but Bowing them is not a chore at all. My E speaks very quickly and the D did sound bright but I put that tone filter thingy on it and no prob. But anyway back to what you said. I was sure that the Spiro would take some getting use to comming from Oblagatos as far as tension but to my surprise if anything the tension is less. I highly recommend you trying one of these Tailpiece`s just for that possibility of the Starks being friendlier to the paws...all well..

Dave

 

Dave --

"Tone filter?" Please elaborate...