Extended-Range Classical Guitars – Beyond the Six Strings
The six-string classical guitar is one of the most refined instruments in Western music, yet it has never fully contained the ambitions of the players and makers who work with it. From the baroque courts of Europe to the concert halls of the twentieth century, guitarists have periodically asked: what lies beyond the standard six strings? The answers have taken many forms — the Russian seven-string tradition rooted in open-G tuning, the acoustically engineered ten-string instrument developed by Narciso Yepes and José Ramírez III, and the elegant eleven-string alto guitar conceived in Sweden for the lute repertoire. Each of these instruments addresses a different musical problem, and together they represent one of the most fascinating chapters in the story of classical guitar making.
The Seven-String Classical Guitar – A Russian Legacy
The seven-string guitar is most strongly associated with Russia, where it flourished as a distinct national tradition for well over a century. Known as the semistrunnaya gitara, the Russian seven-string guitar was tuned to an open G major chord — D–G–B–d–g–b–d — a pattern derived in part from the tuning principles of the theorbo and the English guittar. This open, chordal tuning made the instrument ideally suited to the performance of Russian folk songs and romances, genres that rely heavily on major-key harmonies and flowing arpeggiated accompaniments.
The name most closely tied to the early development of the Russian seven-string is Andrei Sychra (1773–1850), a virtuoso of Czech-Polish origin who shaped the instrument's pedagogical and compositional tradition. Sychra wrote hundreds of pieces for the seven-string guitar and trained a generation of Russian players, embedding the instrument deeply in the cultural life of nineteenth-century Russia. The seven-string was the guitar of choice among gypsy ensembles, salon musicians, and conservatory-trained soloists alike, creating a rich and largely self-contained repertoire that remains underexplored in the West.
The modern seven-string classical guitar more commonly found outside Russia differs from the Russian instrument: it is typically tuned like a standard six-string with the addition of a low B string below the standard low E. This configuration extends the bass range without requiring a change in playing technique or chord-shape vocabulary, making it accessible to players already fluent on the six-string instrument. The extra low B is particularly useful when performing transcriptions of lute music, keyboard works, and orchestral arrangements, where the occasional need to reach a note below the open E string would otherwise require retuning or compromise.
The Ten-String Guitar – Narciso Yepes and the Acoustic Problem
Of all the extended-range classical guitars, the ten-string instrument developed by Narciso Yepes is the most intellectually ambitious. Yepes, one of the great Spanish guitarists of the twentieth century, was deeply dissatisfied with what he perceived as an acoustic imbalance in the standard guitar. Eight of the twelve notes in the equal-tempered chromatic scale, he argued, lacked adequate sympathetic resonance on the six-string instrument — the open strings simply did not vibrate in sympathy with those pitches the way they did with others. The result was an unevenness in tone that Yepes sought to correct through systematic design.
Working with Madrid luthier José Ramírez III, Yepes developed a solution: four additional strings tuned to C, B♭, A♭, and G♭, positioned below the standard six strings. Together with the three existing bass strings, these four resonators cover all twelve chromatic pitches and their primary harmonics, allowing any note played on the upper strings to find a sympathetically vibrating bass partner. The first instrument was completed in March 1964, and Yepes premiered the ten-string guitar that same year performing the Concierto de Aranjuez with the Berlin Philharmonic Orchestra. After 1964, he used the ten-string exclusively, giving an average of 130 performances a year across all six inhabited continents.
The Yepes ten-string is not simply a guitar with more notes. It is an acoustically redesigned instrument, and adapting to it requires significant technical adjustment. The wider neck and the proximity of the additional bass strings demand a rethinking of right-hand positioning, and the repertoire — expanded dramatically by Yepes to include Renaissance and Baroque lute transcriptions as well as newly commissioned works — calls for approaches to fingering and voicing that differ from standard classical guitar practice. Contemporary builders such as Paulino Bernabé have continued to construct ten-string instruments in the Yepes tradition, carrying the lineage forward into the present day. The instrument sits at an interesting intersection with advances in guitar construction that have continued to refine tone projection and resonance across the instrument's range.
The Eleven-String Alto Guitar – A Swedish Invention for the Lute Repertoire
The eleven-string alto guitar was developed in Sweden during the 1960s by luthier Georg Bolin in close collaboration with guitarist Per-Olof Johnson. Johnson's motivation was practical: he loved the lute repertoire, particularly Renaissance and early Baroque works, but was unwilling to learn the radically different right-hand technique required by the lute itself. The solution was an instrument that could be played with classical guitar technique while reproducing something close to the tonal character and string layout of the lute.
Bolin's design addressed this in two ways. First, the six upper strings of the eleven-string are tuned a minor third higher than on a standard guitar, matching the pitch level common to Renaissance lute tuning and earning the instrument the designation "alto." Second, five additional bass strings extend the range downward, providing access to the low notes that Renaissance lute tablature frequently requires. The result is an instrument that occupies a sonic space between the guitar and the lute — warmer and more intimate in the upper register than a modern classical guitar, with a richly resonant bass extension that brings ornamented contrapuntal textures to life with unusual clarity.
The eleven-string became widely known through the playing of Göran Söllscher, a student of Per-Olof Johnson, who used Bolin's instruments in concert performances and recordings that reached international audiences from the 1970s onward. Söllscher's recordings of Bach lute works and Renaissance music demonstrated that the instrument was not a curiosity but a serious interpretive tool, capable of revealing aspects of this repertoire that the standard guitar — for all its virtues — could not fully illuminate. Original Bolin instruments are now rare and highly sought after; their scarcity has encouraged a small number of contemporary luthiers to build new eleven-string instruments to similar specifications. The tradition of Scandinavian and European makers exploring alternative guitar designs has a long history, connecting loosely to the broader lineage of collaborative European lutherie.
Choosing an Extended-Range Instrument – What to Consider
For players considering a move to an extended-range instrument, the first question is always repertoire. The Russian seven-string has a specific and largely self-contained tradition; the modern low-B seven-string is the most broadly useful of the extended-range guitars for players working across lute transcriptions, keyboard arrangements, and contemporary classical music. The Yepes ten-string demands commitment — both to its technical demands and to the particular acoustic philosophy that gave rise to it — but rewards that commitment with a resonance and chromatic completeness that many players find transformative. The eleven-string alto is the instrument of choice for those whose primary interest lies in Renaissance and early Baroque lute music performed with guitar technique, and its tuning requires a significant period of reorientation for players coming from the standard six-string.
In terms of construction, the wider necks of ten- and eleven-string instruments generally require larger hand spans and careful attention to ergonomics. Players with smaller hands should ideally try an instrument before committing to purchase. Neck width, string spacing at the nut and saddle, and overall scale length all vary between makers, and these variables have a significant impact on playability. The string tension of additional bass strings also affects the top's response, making the bracing design of the instrument — whether fan-braced, lattice, or another system — an important consideration. Building a multi-string instrument that achieves tonal balance across its full range is one of the most demanding challenges in lutherie, calling on the same deep knowledge of acoustics and materials that has defined the work of master builders explored throughout the double-top guitar tradition and elsewhere.
Those new to multi-string instruments should also be aware that string availability varies considerably. Standard strings for ten- and eleven-string guitars are made by fewer manufacturers than those producing strings for the six-string instrument, and finding the right gauges for the additional bass strings sometimes requires experimentation. Several specialist suppliers cater to this market, and the growing community of extended-range classical guitarists has made strings easier to source than they were even twenty years ago.
A Living Tradition
The extended-range classical guitar is not a single instrument but a family of solutions to a family of musical problems. What unites them is a shared conviction that the standard six-string, magnificent as it is, does not exhaust the possibilities of the classical guitar's sonic world. Whether one is drawn to the open resonance of the Russian seven-string tradition, the acoustically rigorous design of the Yepes ten-string, or the lute-inflected warmth of the Bolin eleven-string alto, these instruments offer a depth of repertoire and a distinctiveness of voice that repays serious exploration. The makers and players who have devoted themselves to extended-range instruments have expanded the guitar's vocabulary in ways that continue to enrich classical music as a whole — a reminder that the history of the guitar has always been one of restless, creative reinvention, shaped by the same visionary spirit found in the work of great makers from Daniel Friederich to José Luis Romanillos.
