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Acoustic Archtop Bass

I got a lot more volume (and better tone) out of my medium-scale flat-top fretless ABG by replacing the awful phosphor-bronze roundwounds with Thomastik Jazz Flats. They do an extended scale set if you need extra long.
I may very well try those on my wife's oval hole archtop. My buddy said "stay with the Elixer round wounds on mine!". I guess he's good with it. Just posted to see what was working for others even though my build is a little unconventional. :)
 
Those videos prove that it is still not nearly loud enough.
Completely drowned out by the acoustic guitars...

The only acoustic bass that is really loud is the bass developed by Olavi Linden.
This bass has a diaphragm and rolled up horn inside the body.
The mechanism is similar to that of a Stroh-violin.

And even that bass has a piezo plus pre-amp, because it still is obviously acoustically not loud enough in a situation with other instruments.




 
Those videos prove that it is still not nearly loud enough.
Completely drowned out by the acoustic guitars...

The only acoustic bass that is really loud is the bass developed by Olavi Linden.
This bass has a diaphragm and rolled up horn inside the body.
The mechanism is similar to that of a Stroh-violin.

And even that bass has a piezo plus pre-amp, because it still is obviously acoustically not loud enough in a situation with other instruments.





Have you try it ?
I put money that mine is louder and sound better
 
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Those videos prove that it is still not nearly loud enough.
Completely drowned out by the acoustic guitars...

The only acoustic bass that is really loud is the bass developed by Olavi Linden.
This bass has a diaphragm and rolled up horn inside the body.
The mechanism is similar to that of a Stroh-violin.

And even that bass has a piezo plus pre-amp, because it still is obviously acoustically not loud enough in a situation with other instruments.





It is sound like almost every acoustic bass thay i heard. a bit more deep mabye. send video of it play with other guitars and then i will decide. I have had trials with many recommended acoustic basses. Taylor AB, Tacoma Thunder Chief. even the legendary acoustic bass by Stoll that look promising because his largest sizes which should provide enough acoustic volume . Even the last one resonated less from what I use now. How does that make sense? There are probably other related reasons besides the size, like the design of the braces, the choice of trees and the shape of the body itself. But one thing is for sure, you need to hear the instrument in real life and not in YouTube videos
not everything that may sound good and loud on video, sounds good in real life
 
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Just joined up so hello all. I've built a couple of 34" scale, acoustic archtop bass guitars. Fully carved with 20" lower bout and 4" ribs based on Bill Moll's specs that he was so generous to share many years ago. I added a Kent Armstrong floating humbucker for those gigs I'm still waiting for. I built this one about 15 years ago and have been using .045 - .105 phosphor bronze strings ever since. It works well in an acoustic jam and louder than any other acoustic bass I've heard other than a stand up. If more than two acoustic guitars in the jam, a pick keeps me right in there. It's about as big a guitar as you'd want to play before standing it up but I like it. Sorry for the poor pics of this one, but I built it for a buddy of mine about 15 years ago and phone pics weren't great back then. My other one is an oval hole archtop of the same size. I've been considering trying different strings but the Elixer long scale bronze are the only ones I've found that are long enough for it. (because of the tailpiece). Any suggestions for acoustic string brands with extra long scale? Thanks
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Hi Foghorn, I missed this for some reason when you first posted. I know we've hooked up on one of the other guitar forums, but just to repeat, that is a really really lovely build! Top notch. If, in some strange twist of fate, find yourself in Italy with this amazing instrument, please look me up!

Are you still building acoustic basses? I've got a build diary for an archtop bass going here on Luthier's Corner at the moment, but I was thinking about starting a more technical thread, to exchange building techniques and ideas specific to acoustic basses. Just a thought.....
 
Just joined up so hello all. I've built a couple of 34" scale, acoustic archtop bass guitars. Fully carved with 20" lower bout and 4" ribs based on Bill Moll's specs that he was so generous to share many years ago. I added a Kent Armstrong floating humbucker for those gigs I'm still waiting for. I built this one about 15 years ago and have been using .045 - .105 phosphor bronze strings ever since. It works well in an acoustic jam and louder than any other acoustic bass I've heard other than a stand up. If more than two acoustic guitars in the jam, a pick keeps me right in there. It's about as big a guitar as you'd want to play before standing it up but I like it. Sorry for the poor pics of this one, but I built it for a buddy of mine about 15 years ago and phone pics weren't great back then. My other one is an oval hole archtop of the same size. I've been considering trying different strings but the Elixer long scale bronze are the only ones I've found that are long enough for it. (because of the tailpiece). Any suggestions for acoustic string brands with extra long scale? Thanks
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Since it has a floating humbucker, which is magnetic, please stop in here and show it off. Higher rez pix would be great to see!
Hollowbody Club
 
Hi Foghorn, I missed this for some reason when you first posted. I know we've hooked up on one of the other guitar forums, but just to repeat, that is a really really lovely build! Top notch. If, in some strange twist of fate, find yourself in Italy with this amazing instrument, please look me up!

Are you still building acoustic basses? I've got a build diary for an archtop bass going here on Luthier's Corner at the moment, but I was thinking about starting a more technical thread, to exchange building techniques and ideas specific to acoustic basses. Just a thought.....
Hi Honza. I've only built two but will likely build more in the future. Thanks for the kind words. I was in Italy about 5 years ago and may be coming again next year. It's difficult to fly with such a large guitar which is cello sized, ha! I'll be checking out your build diary. You don't see too many large archtop basses out there. I'm terrible at taking build pictures but do have some progress pictures from when I built the two 15 years ago. The neck is a bolt on useing 1/4" 20 hanger bolts and furniture nuts. I have an extra long hex key I made up and tightened the bolts through the endpin hole. Very solid.
 
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Since it has a floating humbucker, which is magnetic, please stop in here and show it off. Higher rez pix would be great to see!
Hollowbody Club
I'll do that. I do need a better camera or maybe just need to clean the lense, ha! Here's a few better pics and a couple of progress pics from way back when.
 

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Just joined up so hello all. I've built a couple of 34" scale, acoustic archtop bass guitars. Fully carved with 20" lower bout and 4" ribs based on Bill Moll's specs that he was so generous to share many years ago. I added a Kent Armstrong floating humbucker for those gigs I'm still waiting for. I built this one about 15 years ago and have been using .045 - .105 phosphor bronze strings ever since. It works well in an acoustic jam and louder than any other acoustic bass I've heard other than a stand up. If more than two acoustic guitars in the jam, a pick keeps me right in there. It's about as big a guitar as you'd want to play before standing it up but I like it. Sorry for the poor pics of this one, but I built it for a buddy of mine about 15 years ago and phone pics weren't great back then. My other one is an oval hole archtop of the same size. I've been considering trying different strings but the Elixer long scale bronze are the only ones I've found that are long enough for it. (because of the tailpiece). Any suggestions for acoustic string brands with extra long scale? Thanks
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What are the body Dimensions? The picture with you holding the unfinished bass looks like it is quite sizeable.
 
What are the body Dimensions? The picture with you holding the unfinished bass looks like it is quite sizeable.
20" lower bout. 4" ribs making the body 6 1/2" depth at the center. 34" scale and joined at the 17th fret so yes, about as big a guitar as you would want to play without standing it up! I'm actually considering adding a post to my wife's oval hole one.
 
I’m building a large ABG (24.5” lower bout, 4.5” - 9” deep wedge shape, flat back) and my last thing to figure out is the arch top. The bass is all vacuum laminated - and the top will also be - over an arched mold [forma]. It will have a bass bar and sound post.
I’m trying to figure out the best arch or dome to use to make my positive mold. I could leave the perimeter flat or take the domed approach across the whole top (and thus have to angle the sides and linings to mate). Do the plans you’ve mentioned above include details of the compound curves?