Paul Waters -- Luthier

20 Pamela Gardens

Bishops Stortford

Hertfordshire

CM23 3HD

ENGLAND

Archtop Guitars, Flat Top Guitars, Mandolin, Lutes and Viola de Gamba.

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Materials

Most of the descriptions of the materials concern the timbers used in instrument construction. Each timber has  unique properties that contribute to the final sound of the finished instrument. 

First lets deal with Timber in general. The instrument maker is primarily concerned with timbers that possess certain properties. The principle one of these is the strength to weight ratio in particular that of the top or belly material. For hundreds of years the timber of choice in this respect has been Spruce. Traditionally European spruce has been the first choice although today many other species of spruce are commonly used with outstanding results. These would include Englemann and Sitka among the most popular. Cedar has also been used with success for many years. All wood used for the soundboards of instrument should be cut on the quarter to maximise strength, stability and stiffness.

The choice of timber for the back and sides of instruments is also concerned with aesthetic appeal as well as acoustic qualities. The possibilities in this respect are diverse. Primarily hardwoods are used, most popular are those drawn from the Rosewood, Maple and Mahogany families. There are hundreds of timbers within these species alone.  As many of these have become harder to come by instrument makers have been turning increasingly to timbers from fruitwoods such as Walnut and cherry. 

Timbers used to make the neck are are normally drawn from the same families as the back and side. Strength and stability are the key properties here however. The neck of an instrument is under constant stress from the strings. Along with neck reinforcement in the form of a truss rod, steel bar or more recently carbon fibre the neck has to remain rigid.

The fingerboard has to be tough and resist wear from the strings as well as being dimensionally stable tradition has it that ebony or rosewood best achieve this. Once again however as availability of these has become an issue, instrument makers are experimenting with other timbers and materials. 

The bridge material needs to be stiff and dimensionally stable for obvious reasons ebony and rosewood again are traditional, but other timbers are becoming more common. The bridge is a key component of any instrument as it transfers the vibration of the string to the soundboard. 

To sum up, The choice of timber used to build an instrument has to demonstrate certain physical and mechanical properties. It has to look good and stand the test of time. Each timber and combination of timbers goes along way to colouring the final sound of the instrument. The way in which an instrument maker works the timber during construction brings out the full potential of the finished instrument. 

The description here is brief if you have any specific questions regarding the nature of timbers used in instrument building send them to me here. TALK TIMBER. 

Now lets look at some specific Timbers.

Soundboards

Euro Spruce.jpg (16421 bytes)

European Spruce (picea abies). 

Englemann Spruce.jpg (27688 bytes)

Englemann (picea engelmanni) 

Sitka (Picea Sitchensis) 

Western Red Cedar (Thuja Plicata)

Back and sides

Rosewood 

Rio Rosewood.jpg (25031 bytes)

Brazilian (Dalbergia Nigra) 

East Indian Rosewood.jpg (24996 bytes)

Indian (Dalbergia Latifolia) 

cocobolo.jpg (26013 bytes)

Cocobolo (Dalbergia Restusa)  

honduras rosewood.JPG (30046 bytes)

Honduran Rosewood (Dalbergia Stevonsonii)

Mahogany

Figured Honduras Mahogany.jpg (25935 bytes)

Honduras (Swietenia Macrophylla)

Maple (Acer spp_)

figured Maple.jpg (37875 bytes)

Fruitwood

European cherry.jpg (17627 bytes)

Cherry (Prunus spp.____)

Euro Walnut.jpg (22172 bytes)

Walnut (Juglans spp.____)

All of these  descriptions are of course subjective. The best way to establish an understanding of how various timbers effect the sound of an instrument is to get out and play some. I have heard exceptions to all the established rules on tonewoods and the descriptions here are intended only as a guide.

I Have been lucky over the years to work with hundreds of timbers and have used a good deal more than I have listed here. If you have any questions on the suitability or potential of any timber contact me and I will do my best to help with some suggestions or advice. TALK TIMBER

 

Soundboards.  

As already mentioned the traditional timber used for soundboards of instruments is either spruce or cedar. Both have a high stiffness to weight ratio. 

European Spruce (picea abies)

Renowned for producing rich trebles and high end clarity. Generally it has the highest stiffness to weight ratio of all the spruces. The sound produced by a European Spruce matures over a period of years and is said to improve with age in both warmth and clarity. My  personal favorite tonewood.     

Englemann (picea engelmanni)

A more immediate tonewood in terms of playing in Englemann produces good treble separation and rich bass response right off the bat with good. Some say the tone dosen't mature in the same way as European Spruce, I however have found it to open up during the first few years of playing and produces a fine instrument for fingerpicking style guitars. 

Sitka (Picea Sitchensis)

Sitka spruce has for a long time been used in production guitars because of its consistent quality. It may not be as rich in overtones but always produces a well rounded and balanced instrument at home in all styles.

Adirondack Spruce (Picea Rubens) 

The use of this timber has declined in recent years. It does have a notable pedigree in that it was used on nearly all pre-war Martin guitars. Need I say more!

Western Red Cedar (Thuja Plicata)

A long time favorite of many classical builders as an alternative to European Spruce. Becoming increasingly popular among steel string players. In particular folk and Celtic styles. The fundamental tone is perhaps somewhat mellower than spruce. 

Back and sides

The choice of wood for the back and sides of an instrument is diverse indeed below are listed just a few of the more common that I have experience with. If you have a requirement for any other timber not listed or a specific question send it to me here TALK TIMBER

Rosewood   

has long been considered the king of tonewoods for backs and sides. There are however many different types each with their own subtle characteristics. 

Brazilian (Dalbergia Nigra) 

This rosewood gave rise to the popularity of all rosewoods used on today's instruments. Now no longer available commercially due to over logging. What does find its way through logging and export restrictions is snapped up fast. The sound it produces has become the holy grail of many instrument makers today. Loud, responsive, well balanced all round and almost unmistakable. Be prepared to pay big money if nothing else will do. 

Indian (Dalbergia Latifolia)

  A dark and attractive rosewood that has replaced Brazilian rosewood as the first choice among many Instrument makers. A rich, warm and sustained tone. Good with almost any size or shape of instrument.

Cocobolo (Dalbergia Restusa) 

An attractive wood that many reckon to be the closet to Brazilian Rosewood in the tone it produces. Personally I believe it to have a tone all of it's own rich bright and strong. 

Honduran Rosewood (Dalbergia Stevonsonii)

Sound wise more closely related to Indian Rosewood than Brazilian. Attractive pink/purple hue that gives it a wonderful appearance when finished. An Immediate  strong singing tone that leaps out at you.

Mahogany 

mahogany has long been used in guitar building. A high stiffness to weight ratio has made it one of the most popular timbers for necks on most flat top guitars. Various types of Mahogany have also been used for the backs and sides of instruments.

Honduras (Swietenia Macrophylla)

Much lighter than most rosewood Honduran Mahogany produces clear and bright sounding instruments with a balanced but not overly strong bass response. Honduran mahogany is the bench mark for other varieties that are finding there way into instruments today.

Maple (Acer spp.___)

  is perhaps the oldest established wood used for backs and sides of instruments. Although not commonly used on flat top instruments it is almost exclusively used on the violin family and also on Archtop guitars. Maple produces some wonderfully unique figure including flame, quilted, and birdseye that most people are familiar with. Maple as a tonewood is perhaps less subtle and more transparent than Rosewood or Mahogany when used on flat top guitars. However when used on Bowed instruments and Archtops it is rarely surpassed. There are many types commonly used and descriptions such as hard, soft and rock maple have become almost meaningless in recent years. If you are after a particular species of maple it is essential to specify it by botanical name since it is all but impossible to tell them apart due to the huge variety within each individual species.  As a consequence the tonal difference is also very subjective. I select all my Maple on Aesthetic appeal and the natural resonance of the individual piece.

Fruitwood

Although fruitwoods have been used for hundreds of years in Instrument building. Only recently have they started to return to the forefront as makers look to other timbers to replace those that are becoming scarce or expensive. The same cross nomenclature found with maple also applies to many of the fruitwoods. A few are listed below.

Cherry (Prunus spp.___)

Although relatively soft cherry makes an outstanding timber for use as a tonewood. Broadly falling into two categories. European and American. Cherry as a whole falls somewhere between mahogany and maple in terms of tone. European cherry is generally more brown  in color than American which has a more red hue. Both however will  mellow to a rich  golden color. In my opinion one of the least appreciated tonewoods

Walnut (Juglans spp.__)  

A timber that has  a striking resemblance to some of the rosewoods in both looks and sound. Perhaps not as bass rich or complex but produces an instrument with exceptional separation of both bass and mid register with fine clear trebles. Once again it is commonly available as European or American (Black) walnut. The European being browner than the purple/grey of American Walnut. Both produce and excellent instrument

 

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