Gramola Sound Box

The Gramola sound box is an acoustic pickup used on early 20th‑century European gramophones marketed under the Gramola brand, the Austrian branch of The Gramophone Company (HMV). It employs a lightweight mica diaphragm driven by a steel‑needle stylus bar, converting mechanical groove vibrations into sound for horn or internal‑cabinet reproduction.
The unit typically features a nickel‑plated brass housing, a pivoted stylus bar with rubber damping gaskets, and a bayonet‑type tonearm connector compatible with many HMV‑pattern arms. Sensitivity and tonal balance depend on the condition of the diaphragm and gasket materials, which harden with age.
Designed for 78 rpm shellac records, the Gramola sound box delivers the characteristic frequency range of mica pickups—approximately 200 Hz to 5 kHz—providing adequate volume for acoustic playback.
Surviving examples are valued for their historical connection to HMV’s continental operations and their compatibility with a wide range of period gramophones.A cartridge with a diaphragm, normally made of mica, for the first 78 rpm turntables, initially with a spring-driven, manually wound motor. Signal amplification occurred through a speaker included in the box of the turntable or through a horn made of metal, wood, or fragile glass.

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