The 5-String Double Bass

[Ken Smith]

David, regardless of the Fingerboard arch, you need a minimum amount or Bridge arch to Bow. Drawing a line on top of the bridge under the strings, measure the height every other string from that line to the bottom of the string in the middle. Looking with your eye it should be about 1/4" but with a 5-string you may have trouble getting much more than 3/16". A 5er is usually a tighter Bowing Bass from what I have experienced so good Bow technique is needed.

I know that having a good Fingerboard arch to nearly match your bridge is preferred but it would be working backwards to shape the bridge to match the FB. Yes, the string heights may not be optimum but reducing the bridge arch impedes clean bowing.

Since the String heights normally increase from the G to the E (or B) strings, it is best to work on the Bowing arch first if you intend to Bow. Fixing or replacing your fingerboard might be another option as well so as not to take it out on the bridge.