Handmade Guitars by Bob Gramann


The Chesapeake Bass
These guys are big!  And loud (for an acoustic bass guitar)!  The body is 19 3/4" long and 16 3/4" wide at the lower bout.  With a 33" scale length, you can easily sweep the other players off the stage when they stand too close.

Acoustic Bass Guitars have a reputation for being not so loud.  I built the first one of these as an experiment to see if I could get around that reputation.  Since the body of a guitar can't be big enough to effectively amplify the lowest of the bass notes, I designed this bass to accentuate the second harmonic.  In the case of the low E string, that means I accentuate the 82 Hz instead of the fundamental at 41 Hz. There is a psycho-acoustic effect where our brain fills in the missing fundamental when it hears the overall shape of the note, so the bottom E sounds loud even though it is really the second harmonic of that note that gets to your ear.  A body this size can amplify 82 Hz quite well, so this instrument can be heard when playing with an acoustic group. 

Using computer analysis (a Fast Fourier Transform), this instrument shows about the same power as my acoustic upright bass although the distribution of the peaks is different. In practical terms, that means it sounds quite loud to someone standing in front, but the deepest bass notes don't fill the room all around like the upright bass does.  There is plenty of headroom in these basses, so when you really want it loud, you can play with a pick for much more volume.  Each has a K&K Pure Bass Pickup installed for when you do want to plug in.



The Chesapeake Bass



TheChesapeake Bass 122 89 front



122- Fretless, 34" scale, 1 11/16" nut.  Sitka top, Osage Orange back and sides.  You will have a hard time finding a louder acoustic bass.  And, it sounds pretty nice.  K&K Pure Bass pickup installed.

$3299  -- This one is a model for me to play and show.  If you like it, I will build one for you.
89 - Sitka top, Mahogany back and sides. 33" scale, 1 11/16" nut.  It's loud.   K&K Pure Bass pickup installed. 

On display at Picker's Supply in Fredericksburg, VA

$3000

Hear and see Andres Rotmistovsky play it at HMT.




Bob Gramann
122 Laurel Avenue
Fredericksburg, VA 22408

(540) 898-0611
bob@bobgramann.com
12/10/17