Considerations for Selecting a Resonator Guitar

Considerations for Selecting a Resonator Guitar

The body of a resonator guitar functions like the cabinet used to house an audio speaker. Cabinets are usually heavy and their construction is very sturdy. This forces the sound out of the speaker cone, instead of losing signal due to vibration and the sound energy being absorbed by the cabinet material itself.

Steel - Steel is very hard. They tend to produce a very bright, crisp, sharp tone.

Brass - Brass is softer than steel and may absorb some tone, but usually they are said to have a warmer, softer, blended tone compared to steel.

Wood - Wood being the softest has a delicate tone. Bluegrass Dobro (lap style resonator) players usually prefer wooden bodies. Plywood actually makes for a stronger body than solid hardwood.

Other - Different materials have been used. In an attempt to produce a lighter instrument aluminum has been used, but the softness of the body makes for a muddy tone. Graphite is another experimental material.

A resonator cone (kind of like, a metal pie pan) functions very similiar to a banjo skin. The energy of the strings vibrating move the bridge, that in turn move the cone. The sound comes out of the cone directly like an audio speaker, but also develops inside the body and exits via the soundports in the body's upper bout. A coverplate is used to protect the cone from damage. Cones are manufactured out of aluminum by being spun (superior) or pressed. They are rather delicate.

T Bar Bridge - The Tricone is by far the best model in regards to overall balanced tone and volume. Using a T Bar, three small cones are attached to the bridge. This provides treble, mid range, and bass.

Biscuit Bridge - The single cone is convex like a volcano. On top sits a wooden disk (biscuit). The bridge stands vertically in the middle of disk. This model was very popular with many early Blues players like Son House, Bukka White, and Blind Boy Fuller.

Spider Bridge - John Dopera who invented the resonator guitar had to reinvent his guitar, after he no longer owned the original patents. He inverted the cone to concave like a funnel and placed a spider web type bridge made out of aluminum across the top. This guitar was sold under the name Dobro. Short for Dopera Brothers. Along with the wooden body, this bridge is favored by Bluegrass lap style players, but also it should be noted, the necks are usually different.

There are two types of necks

Round - This is just like the shape found on any standard guitar. 12 frets clear of the body was typical of 1920/1930 guitars. There was no internal support bar (truss rod) installed inside the neck to prevent bowing (neck lifts due to string tension) and it is easier to adjust the intonation (every note plays in tune, all the way up the fingerboard). Later in the late 1930/1940 installing truss rods also allowed for longer necks. Having 14 frets clear of the body allowed for easier access beyond the 12 fret. Also, if tuned to Open D, adding a capo at fret 2, to Open E, there are still 12 frets clear of the body. This cannot be done on a 12 fret without some difficulty.

Square - This neck is rectangular and cannot be played like a standard guitar. It is designed to be played in the lap style. The thicker neck further prevents bowing and allows for more string tension. Traditionally, this instrument was used to play Hawaiian music before it became a popular American country instrument. Initially, John Dopera was actually trying to invent a variation of this lap instrument, so it could be loud enough to compete against standard orchestra instruments.

Strings and Set-Up
Resonator guitars can be played in standard and open tuning. In standard tuning, it it important to hand mute unwanted strings from vibrating causing dissident overtones. This is usually not the situation in open tunings because the open notes are sympathetic to the overall sound.

A good Set - up is essential. String height for slide playing still needs to be low enough to finger notes and chords over the entire length of the fingerboard. The correct string tension allows the slide to ride on the strings without "bottoming out" and hitting the frets. More importantly, it provides the correct downward pressure on the cone. Too little, the cone rattles and has a weak tone. Too tight, crushes and locks up the cone.

String gauge and tuning are related. Usually lower tunings require heavier strings. In general, for below standard tunings like Open D (DADf#ad) and G (DGDgbd), medium gauge "nickel" strings work well. Although, a slightly heavier first string (.016) will provide a better tone. When changing strings, remove one string at a time and tune up. It is not advisable to completely remove all tension from the cone regularly. In this case, slowly tune up the strings symmetrically, so pressure is equally applied to the cone across all the strings. Cones easily "crush in" due to too much pressure.

Republic Guitar Sound Samples ( )

Tricone -
Highway 61 -
Duolian -
Parlor -
Tenor -
Tricone and Duolian Duet -
Parlor and Highway 61 Duet -

Lessons Search: keni lee

CD1 Vestapol Tuning (Open D) for 6 string & 3 string cigar box
CD2 Spanish Tuning (Open G) for 6 string
CD3 Comparing Vestapol and Spanish Tuning for 6 string
CD4 Cigar Box Guitar for 3 string
CD5 Cigar Box Guitar for 4 string
CD6 Cigar Box Guitar for 3 string Part 2 (Devil's Tuning Method)


Views: 2518


You need to be a member of Cigar Box Nation to add comments!

Join Cigar Box Nation

The Essential Pages

New to Cigar Box Nation? How to Play Cigar Box GuitarsFree Plans & How to Build Cigar Box GuitarsCigar Box Guitar Building BasicsCigar Box Guitar Parts Store

Site Sponsor

Recommended Links & Resources


Volume/Tone Pots

Started by Brent Kasl in Building Secrets, Tips, Advice, Discussion. Last reply by Cause the Blue rat yesterday. 4 Replies


Started by Shane Speal in Feature Articles. Last reply by Alex Fong on Friday. 2 Replies

Mods to CBG kit

Started by James Pobog in Building Secrets, Tips, Advice, Discussion. Last reply by James Pobog on Wednesday. 4 Replies

s/s lm386 draw amp,

Started by GARAGE HERMIT in Building Secrets, Tips, Advice, Discussion. Last reply by Paul Craig on Wednesday. 8 Replies

Latest Activity

Dennis "Denbo" Goodinson commented on Uncle John's video

Pawn Shop Christmas Commercial

"Pick, Uncle John was on Overhaulin'. Saw it with my own eyes. It came in as a Mustang went out…"
1 minute ago
the anonymous pick commented on Uncle John's photo

Christmas time Swampy

"Run run Dudolph  ;-)"
2 minutes ago
the anonymous pick commented on Uncle John's video

Pawn Shop Christmas Commercial

"Prius????.... YOU TOLD ME IT WAS A MUSTANG !!!"
10 minutes ago
Paul Craig replied to Paul Craig's discussion What's on your workbench?
"That's a cool tin and just right for Christmas."
40 minutes ago
Doug Christensen commented on Old Lowe's group TEXAS HOME
"Man it took me most of the morning scrolling down the list look'in forever for the Texas…"
53 minutes ago
Uncle John commented on Uncle John's video

Pawn Shop Christmas Commercial

"LOLs Nancy.   Thanks."
53 minutes ago
Gary W aka Rev. Bluejeans commented on the anonymous pick's photo

Swamp cuz

"Exceptional! Great design, Pick!"
54 minutes ago
Gary W aka Rev. Bluejeans commented on the anonymous pick's photo


"Capital idea!"
57 minutes ago
Gary W aka Rev. Bluejeans commented on Uncle John's photo

Christmas time Swampy

"Festive swampiness!"
58 minutes ago
Sammy Lloyd commented on Sammy Lloyd's video

Shane and Sammy sing Whiskey and You by Chris Stapleton

"Thanks all, your comments are so encouraging........and Nancy I'm so glad you appreciate…"
59 minutes ago
Paul Craig replied to Paul Craig's discussion What's on your workbench?
"Whenever I run into a problem, I've learned to put it down and think it over for awhile til I…"
1 hour ago
Doug Christensen left a comment for Lee Greer
"Hello Lee, My email is "" I'd be glad to get you going for…"
1 hour ago



© 2019   Created by Ben "C. B. Gitty" Baker.   Powered by

Badges  |  Report an Issue  |  Terms of Service

\uastyle>\ud/** Scrollup **/\ud.scrollup {\ud background: url("") no-repeat scroll 0 0 transparent;\ud bottom: 25px;\ud display: inline !important;\ud height: 40px;\ud opacity: 0.3 !important;\ud position: fixed;\ud right: 30px;\ud text-indent: -9999px;\ud width: 40px;\ud z-index: 999;\ud}\ud.scrollup:hover {\ud opacity:0.99!important;\ud}\ud \uascript type="text/javascript">\ud x$(document).ready(function(){\ud x$(window).scroll(function(){\ud if (x$(this).scrollTop() > 100) {\ud x$('.scrollup').fadeIn();\ud } else {\ud x$('.scrollup').fadeOut();\ud }\ud });\ud x$('.scrollup').click(function(){\ud x$("html, body").animate({ scrollTop: 0 }, 600);\ud return false;\ud });\ud });\ud \ua!-- End Scroll Up -->