12-string GA

Ordering a custom multi-string acoustic guitar from our workshop offers a truly unique and personal experience. You have the freedom to choose from a wide range of woods, styles, and exquisite inlay materials.

Alternatively, if you prefer not to wait, you can explore our collection of available guitars

12-string Grand Auditorium Guitar Front Photo

The Grand Auditorium Model (GA) is a mid-large-size guitar, with great basses, volume, and projection. Excellent for finger-style, strumming, and flatpicking.

It has a full bass sound with articulate mid-range and sparkling top-end so you can really get a lot out of the guitar, no matter your style.

The Auditorium is also comfortable to play because it’s not too big either. It would be the ideal choice for anyone after a multi-purpose acoustic guitar.

We create our instruments in the following versions:


Opus Prime

Crafted from carefully selected master-grade woods, the Opus Prime offers a beautiful and refined sound. This model reflects our dedication to superior craftsmanship and attention to detail.


Opus Virtuosa

The Opus Virtuosa is made from rare, one-of-a-kind master-grade woods, delivering an even richer and more dynamic sound. It exemplifies our commitment to pushing the boundaries of quality. Each Opus Virtuosa includes the exclusive ‘Amber-Line’ inlays at no additional cost.


Opus Magnum

Our Opus Magnum, meaning ‘our greatest work,’ stands as a true one-of-a-kind masterpiece. Featuring ancient wood species, mammoth ivory, and genuine Baltic amber, it delivers the best possible sound. This model includes all of our patented and innovative solutions in the price, representing the pinnacle of our craftsmanship, designed for those seeking an extraordinary, unparalleled instrument.


Base SpecificationOpus PrimeOpus VirtuosaOpus Magnum
Patented NeckAcoustic Tubes with African Ebony outletsAcoustic Tubes with African Ebony outletsAcoustic Tubes with mammoth bone outlets
Innovative Soundboard ConstructionWAVE type resonatorS-WAVE type resonatorX-WAVE type resonator
Innovative Back&Sides ConstructionHigh-Tech PressHigh-Tech PressX-High-Tech Press
Patented BridgeBlack Ebony Bridge with Drilled Holes, adorned with authentic bone and Master Grade African Ebony inlaysBlack Ebony Bridge with Drilled Holes, adorned with authentic bone and Master Grade African Ebony inlaysFlamed Ebony Bridge with Drilled Holes, adorned with authentic mammoth bone and natural Baltic amber inlays
Patented Sides JointSigmoidal Joint of the SidesSigmoidal Joint of the SidesSigmoidal Joint of the Sides
Patented Translucent Head-*Amber HeadLight available with Full-Amber PackageAmber HeadLight
Patented Translucent Back Rosette-*Optional Amber BackLight RosetteAmber BackLight Rosette
Double-TopAlpine Spruce from Tirol / Western Red CedarOld-growth Redwood / Alpine Spruce from TirolAncient Kauri (ca. 50 000 years old with a certificate of authenticity) / Old-growth Flamed Redwood
Back&SidesBolivian Rosewood with sapwoodCalifornia Black Walnut BurlAncient Kauri (ca. 50 000 years old with a certificate of authenticity)
Scale647,7 mm / 25.5"647,7 mm / 25.5"650 mm / 25.6"
Nut47 mm (1.85"), hand-shaped and polished authentic bone47 mm (1.85"), hand-shaped, polished and semi-scalloped authentic bone47 mm (1.85"), hand-shaped, polished and semi-scalloped authentic mammoth bone
SaddleHand-shaped and polished authentic boneHand-shaped, polished and semi-scalloped authentic boneHand-shaped, polished and semi-scalloped authentic mammoth bone
SoundholeCentral soundhole with rosette embellished with Black Ebony plates and two bone crown logos, OR single offset soundhole with rosette encrusted with Black EbonyCentral soundhole with rosette embellished with Black Ebony plates and two natural Baltic amber crown logos, OR single offset soundhole with rosette encrusted with Black EbonyCentral soundhole with rosette embellished with authentic mammoth bone frame and natural Baltic amber plates, OR single offset soundhole with rosette encrusted with authentic mammoth bone frame and natural Baltic amber plate
HeadplatesDouble Black Ebony adorned with authentic bone crown logoDouble Black Ebony adorned with natural Baltic amber crown logoDouble natural Baltic amber adorned with natural white Baltic amber crown logo inlaid with three natural black diamonds
Neck WoodModified Aspen with double dual-action truss rodModified Magnolia with double dual-action truss rodAncient Kauri (ca. 50 000 years old with a certificate of authenticity) with double dual-action truss rod
Neck ProfileTurkowiak AsymmetricTurkowiak AsymmetricTurkowiak Asymmetric
HeelAdorned with Black Ebony cap and Black Ebony crown inlayAdorned with Black Ebony cap and natural Baltic amber crown inlayAdorned with natural Baltic amber cap and natural Baltic amber crown inlay
FingerboardBlack Ebony, 16" compound radius, elevatedBlack Ebony, 16" compound radius, elevatedFlamed Ebony, 16" compound radius, elevated
Fingerboard side markersAuthentic bone ⌀2 mm at 3, 5, 9, 15, 17 frets and ⌀3 mm at 7, 12 (double) fretsAuthentic bone ⌀2 mm at 3, 5, 9, 15, 17 frets and ⌀3 mm at 7, 12 (double) frets inlaid with natural Baltic amberNatural white Baltic amber ⌀2 mm at 3, 5, 9, 17, 19 frets and ⌀3 mm at 7, 12 (double) frets inlaid with natural Baltic amber
Frets21 frets (up to C#)21 frets (up to C#)TrueTemperament 21 frets (up to C#)
Frets material18% Nickel-Silver18% Nickel-SilverEVO-GOLD (nickel-free)
Tuning MachinesSingle, Gold, screw inlay, ratio 18:1Turkowiak Gold ARTuners, screw inlay, ratio 18:1, engravingsTurkowiak Hidden-Mechanism tuners with natural Baltic amber buttons, black aluminum rollers with bearings, natural Baltic amber engraved plate, ratio 18:1
Comfort*Optional Arm-Bevel and Rib-bevel integrated with the guitar bodyArm-bevel integrated with the guitar body; *Optional: Rib-bevelArm-bevel and Rib-bevel integrated with the guitar body
VarnishHighly-resonant (own-recipe), anti-static, hand-polished, high-glossHighly-resonant (own-recipe), anti-static, hand-polished, high-glossHighly-resonant (own-recipe) extra-thin, anti-static, anti-bacterial, hand-polished, high-gloss with 24Ct Gold Dust
Modal Tuning-Body Fine-TuningFine-Tuning of each piece
PickguardTransparentTransparentTransparent-Wood
HardcaseBrand, fitted to the guitarBrand, fitted to the guitarHighest-quality authentic carbon fiber fitted to the guitar
WarrantyLimited LifetimeLimited LifetimeLimited Lifetime
LabelTurkowiakTurkowiakTurkowiak with dedication
Video Sound Sample--Recorded by professional well-known musician
Accessories*Optional Turkowiak Guitar Maintenance kit with Two-Way Humidity Control Device*Optional Turkowiak Guitar Maintenance kit with Two-Way Humidity Control DeviceTurkowiak Guitar Maintenance kit with Two-Way Humidity Control Device