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Another twelve string bass

Basvarken

Commercial User
Dec 3, 2010
1,744
10,611
Velp Rockcity
www.thegibsonbassbook.com
Disclosures
Hobby Luthier / Gibson Bass Book
And here's the third of the twelve string basses I've been building last few months.
After this I promise to keep quiet for a few months ;-)

Unlike the other two that are based on well known Gibson model, this one is my own design.


Brooks EB-N-12
- Mahogany body
- Bookmatched Flamed Maple top
- Smoked oak contrasting veneer in between layer
- Five ply Mahogany/Walnut set neck. Glued in
- Warm Honey stain
- High gloss transparent acrylic finish
- Ebony fretboard
- Mother of pearl position dots. 12th circle inlay
- Jumbo frets
- 34" scale
- Zero fret and buffalo horn nut
- ETS twelve string brass bridge set
- Two spokewheel double action trussrods
- Carbon reinforcement strip in the neck
- Lace Alumitone Bass Bar humbuckers
- Bourns volume pots
- Bourns Push-pull tone pots for humbucking / single coil
- Mallory 22nF capacitors
- Gotoh GB 350 lightweight bass tuners
- Gotoh Stealth ST 31 guitar tuners
- Pure Tone Multi Contact jack output
- d'Addario EXL 170 - 12 strings
- Weight: 4.25 kg

Electronics circuit by Bas Becu.

eb-n-12-full-1500_orig.jpg

eb-n-12-body-angle-1500_orig.jpg

eb-n-12-headstock-1500_orig.jpg

eb-n-12-bridge-set-1500_orig.jpg

eb-n-12-lower-horn-1500_orig.jpg

eb-n-12-upper-horn-1500_orig.jpg

eb-n-12-headstock-back-1500_orig.jpg

eb-n-12-inlays-1500_orig.jpg

eb-n-12-neckjoint-1500_orig.jpg

eb-n-12-body-angle2-1500_orig.jpg

eb-n-12-body-back-1500_orig.jpg

eb-n-12-output-1500_orig.jpg

eb-n-12-back-1500_orig.jpg

eb-n-12-top-to-bottom-1500_orig.jpg


And a quick video to show you how she sounds



I'll share pics of the build process in posts below
 
I'm afraid I didn't photograph each and every step. Some essential parts of the build are missing. But you'll get the global idea. ;-)

The body is a two piece Khaya (Mahogany species)

brooks-eb-n-12-body-blank_orig.jpg


The top is a bookmatched set of flamed maple which I scored at Holz Faszination in Germany

brooks-eb-n-12-bookmatched-set2_orig.jpg


I put a layer of Smoked Oak veneer in between the Khaya and the Flamed Maple as a contrast layer.
I have no pics of the actual moment where I glue them together.

Routed the controls cavity first
brooks-eb-n-12-routing-controls-cavity_orig.jpg


Here's the result after I routed the body shape along the template

brooks-eb-n-12-routed-body_orig.jpg

brooks-eb-n-12-routed-body2_orig.jpg

brooks-eb-n-12-routed-body3_orig.jpg


The routed the pickup cavities. And chiseled the corners square by hand
brooks-eb-n-12-routed-pickup-cavities_orig.jpg


Routed the controls cover profile. And started shaping the bevels
brooks-eb-n-12-body-back_orig.png


Routed the neck pocket
brooks-eb-n-12-neck-pocket_orig.jpg


Body looking good already
brooks-eb-n-12-body_orig.png
 
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The neck is a five ply Khaya/Walnut laminate.
Quarter sawn. And the middle piece is turned 180 degrees. Should be very stabile
brooks-eb-n-12-neck-blank_orig.jpg


Routed the slot for the carbon reinforcement strip
brooks-eb-n-12-channel-for-carbon-strip2_orig.jpg

brooks-eb-n-12-channel-for-carbon-strip_orig.jpg


And the two slots for the truss rods
brooks-eb-n-12-trussrod-channel1_orig.jpg


Chiseled the part for the spoke wheels by hand
brooks-eb-n-12-trussrods_orig.jpg

brooks-eb-n-12-spokewheels_orig.jpg


Sawed the headstock angle
brooks-eb-n-12-neck-angle-sawed_orig.jpg


Planed and shaved it nice and smooth
brooks-eb-n-12-neck-angle_orig.jpg


Made a ring for the 12th position marker
brooks-eb-n-12-making-12th-position-marker_orig.jpg


Drilled the holes for the position markers. They are 2, 3, 4, 5 and 8 mm
brooks-eb-n-12-fretboard-drilling_orig.jpg


Glued the inlays in and sanded them to the right radius
brooks-eb-n-12-fretboard-radiused_orig.jpg


Made side position markers.
brooks-eb-n-12-fretboard-side-markers_orig.jpg


Hammered the frets in
brooks-eb-n-12-fretboard-fretting_orig.jpg


Cut the excess off on the sides and filed/sanded it smooth
brooks-eb-n-12-fretboard-fretted_orig.jpg


And the 12th side position is also a circle again
brooks-eb-n-12-fretboard-12th-pos_orig.jpg
 
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I put a layer of the same smoked oak that I used for the body on the headstock and topped it off with a veneer of mahogany
brooks-eb-n-12-veneered-headstock_orig.jpg

brooks-eb-n-12-veneered-headstock2_orig.jpg


Shaped the neck profile and the heel
brooks-eb-n-12-neck-heel_orig.png


Drilled the holes for the tuners
brooks-eb-n-12-neck-heel_orig.png


Stained the body a dark brown to make the flame pop. After it dried, I sanded it back
brooks-eb-n-12-contrast-stain_orig.jpg


Then stained the warm yellow
brooks-eb-n-12-stained-top_orig.jpg


Wasn't happy with the yellow. It was supposed to be warm honey. Found it too yellow.


Started all over. Sanded back to bare and tried again...
brooks-eb-n-12-stained-top-v2-2_orig.jpg

brooks-eb-n-12-stained-top-v2_orig.jpg



Filled the pores on the back and neck. Decided not to stain it and keep it the natural (somewhat pale pink-ish) colour.
brooks-eb-n-12-porefiller-on-back_orig.jpg


And sprayed quite a few layers of transparent lacquer. Lots of sanding in between..
brooks-eb-n-12-body-back_orig.jpg


brooks-eb-n-12-body_orig.jpg


Installed the tuners
brooks-eb-n-12-head_orig.jpg

brooks-eb-n-12-head-back_orig.jpg


Put strings on
brooks-eb-n-12-stringed2_orig.jpg
 
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