Grundig Box 153
The Grundig Box 153 is a model that could not be found documented anywhere in the available research. A search for it turns up only a near-namesake, the Grundig Box 150a, which appears to be a different speaker. Whether the Box 153 is a later revision, a regional variant, or a distinct model, the record doesn't say. Classified ads in High Fidelity (November 1961, p.138) show the wider audio market of the era, but no Box 153 listing appears there.
What little can be said comes from the Box 150a, which shares the "Box" naming convention and likely the same design family. That model was a compact 2-way bass reflex loudspeaker measuring 36 x 21 x 19 cm and weighing 4.5 kg, with an 8-ohm impedance and a crossover at 3,000 Hz. The frequency response was rated at 50 - 25,000 Hz. Sources disagree on power handling. One lists 50 watts, another 30 watts nominal. Sensitivity was rated at 85 dB / 2.83 V / 1 m.
If the Box 153 followed the same pattern, it would have been a small German bookshelf speaker, built to Grundig's usual standard of solid cabinet work. The dimensions, driver complement, and any markings on the rear panel of a Box 153 would be useful additions to this page.
- Type: 2-way compact loudspeaker (per Box 150a documentation)
- Dimensions: 36 x 21 x 19 cm
- Weight: 4.5 kg
- Impedance: 8 ohms
- Crossover: 3,000 Hz
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