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The Semi-Hollowbody SR (Spread Resonance) guitars provide the sustain you would expect from a solid instrument, but with the body vibrance much like you would find in a full size Archtop - all in a thin, light (under 5.75lbs) instrument.

 

 

Body Resonance in Archtops and Semi-Hollowbodies

Grez SR Series Construction Explained

The Spread Resonance approach allows body resonances to influence the instrument sound over as wide a frequency range as possible.  This is not to imply that focused narrow band resonances are not desirable or tonally useful.  Your typical semi-hollowbody would fall into this category.  If you tap on the top, bass or treble side, you will perceive two things immediately.  First the primary note or resonance is fairly high in frequency, around 300Hz or higher and that both halves generate nearly the same note. This highly focused resonance is much of what gives a 335 its distinct sound.

 

A brief historical look at the archtop guitar will show a transition in some instruments from solid carved wood to laminated materials to lower production cost and to help control acoustic feedback in amplified situations.  To further control feedback blocking and eventually full center blocks were added creating the semi-hollowbody we are all familiar with.  But, by adding a center block, the unsupported area of both the top and back plates are significantly reduced.  The remaining plate area will be significantly stiffer, in turn resonating at a much higher frequency. 

 

These plates can be re-optimized based on their now smaller unsupported dimensions to bring back some of the liveliness and warmth (lower frequency resonance's) of the full hollow archtops. Similarly, large asymmetrys can be designed into all aspects of the body’s internal structure while keeping instruments exterior looking traditional. In doing so, a very pleasing and useful balance can be found between the loud, rich and powerful, but feed-back prone full hollowbodies and the tight but feed-back resistant sound of today’s semi-hollowbodies.

SR-16   

 

16" Semi-Hollow body 

Solid Sitka Spruce Top or Redwood 

Figured Maple Back and Sides

Honduran Mahogany Center Block and Neck

East Indian Rosewood Fretboard

25" Scale, Jumbo Frets

BG Pups Vintage P-90

TonePros AVR2 Bridge and Aluminum Tail Piece

Nitro Finish

RB Continental Case

 

As Shown $2,850

Listen to the SR-16        Video 1        Video 2        Video 3

Both the SR-15 and 16 are available in a standard and Historic variation. The Historic  uses dog ear P-90s, a trapeze tailpiece

and selector switch reminiscent of the old Gibson Switch Master.

SR-15   

 

15.25" Semi-Hollow body 

Solid Sitka Spruce Top

Figured Maple Back and Sides

Honduran Mahogany Center Block and Neck

East Indian Rosewood Fretboard

25" Scale, Jumbo Frets

BG Pups Vintage P-90

TonePros AVR2 Bridge

Bigsby 

Nitro Finish

RB Continental Case

  

As Shown $2,850

Listen to the SR-15        Video 1        Video 2  

SR-14   

 

14.25" Semi-Hollow body 

Solid Redwood Top

Honduran Mahogany Back and Sides

Honduran Mahogany Center Block and Neck

Amazon Rosewood Fretboard

25" Scale, Jumbo Frets

TV Jones Filtertron Classic Plus

TonePros AVR2 Bridge and Aluminum Tail Piece

Nitro Finish

RB Continental Case

 

As Shown $2,700

Listen to the SR-14        Video 1        

Mendocino  

 

13.25" Semi-Hollow body 1.75" Depth 

Solid Old Growth Redwood Top

1pc Honduran Mahogany

Back, Sides and Neck

Macassar Ebony Fretboard

25" Scale, Jumbo Frets

Lollar Goldfoil Pickups

TonePros AVR2 Bridge

Grez Tail Piece

Nitro Finish

RB Continental Case

 

As Shown $2,800

The Grez Mockingbird is a fully chambered lightweight guitar (5lbs) designed and built with a nod to P.A. Bigsby's approaches. When enough material has been removed from a chambered solid body and the top cap is thin enough, it's behaves like a small semi-hollow body.  Because of this, although it looks like a solid body, it has a strong acoustic voice that, when coupled with Gold Foil pickups, produce a uniquely useful and lively sound.

Listen to the Mendocino        Video 1        Video 2       Video 3

SR-16GV 

 

16" Semi-Hollow body 

Sitka Spruce Top

Figured Maple Back and Sides

Rosewood Fretboard

25" Scale, Jumbo Frets

Honduran Mahogany Neck and Center Block

TV Jones Classic Filtertrons

Top Load Tele Bridge

Nitro Finish

RB Continental Case

 

As Shown $2,850

Listen to the SR-16GV       Video 1        Video 2     

CRB-15 Bass

 

15.25" Semi-Hollowbody, 2.6" Depth 

Maple Top, Back and Sides

Ebony Fretboard

Hipshot UltraLite Tuners

30" Scale Fretless

Honduran Mahogany Neck and Center Block

TV Jones Thunder'Blade Pickups

Nitro Finish

 

As Shown $2,600

 

 

I build basses like this in a variety of sizes and depths, both hollow and semi-hollow.  Scale length, fretted or not, pickups, color and everything else is designed to your specifications.  My intention is to recreate cool vintage basses like the Harmony H22 or Howlin Wolf Bass, but with modern reliability and features.

 

© 2016 Grez Guitars    Petaluma, California    barry@grezguitars.com    (707)235-2128

 

Photography by Philip Pavliger     philip-pavliger.com