HK Higher Knowing, LLC
Large 440Hz 13-Note One Octave C3-C4 Thetazen Shruti Box
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Large 440Hz 13-Note One Octave C3-C4 Thetazen Shruti Box with Carry Case
Size: 16.25" x 12.5" x 3.5"
Average weight: 3630g
Scale: Third Octave 13-Note C3-C4
Includes: Carrying Case
This is the largest size in our Thetazen Shruti Box lineup, tuned to 440Hz with a 13-note third-octave range from C3 to C4 (covering the full chromatic scale across one octave, plus the upper C). The third octave sits in the lower-mid vocal range, which makes this size especially well suited to chant work, mantra practice, kirtan, and any setting where the drone needs to support a male vocal range or sit beneath a singer rather than above. The lower tonal placement also gives the drone a grounding, meditative quality that pairs naturally with sound therapy sessions, breathwork, yoga nidra, and contemplative practice. The larger body delivers the fullest, most resonant voice in the lineup, with deeper bellows capacity and stronger projection that lets the drone carry through larger rooms, group sessions, and recording settings without losing presence. Crafted from solid teak with metal corner reinforcements and a polished finish, the box is built to hold its tone and travel well for years of regular use.
The shruti box has its roots in the classical music traditions of India, where it evolved as a portable hand-pumped reed instrument designed to hold a steady drone behind vocalists and other musicians. Its name comes from the Sanskrit word shruti, meaning "that which is heard," a term that in Indian musical theory refers to the smallest perceptible interval of pitch and to the foundational tones around which raga melodies are built. Historically, the shruti box replaced the older tanpura in many traveling settings, since it offered the same continuous drone in a far more compact and durable form. Today the instrument is used well beyond its classical origins, finding a place in sound therapy, meditation, kirtan and devotional singing, yoga and chanting practice, songwriting, and any setting where a sustained, breathing drone is needed to anchor voice or melody.
Please note that the Thetazen Shruti Box is handcrafted from solid wood by skilled artisans, and small variations from instrument to instrument are a natural part of that process. Differences in wood grain, color, finish tone, and small variations in the hardware placement are normal and expected, and may differ slightly from the photos shown. Each box is tested and tuned before shipping, but because reeds are hand-set, very subtle character differences in tone and bellows response are part of what makes each instrument unique rather than identical to the next. These small variations are not flaws but the signature of a handmade instrument made the traditional way.
