EPI 50
Little is documented about the EPI 50. What the record shows comes almost entirely from the company's own advertising, which ran in several audio magazines in 1973-74. In those ads, EPI positioned the Model 50 as the entry-level offering in its Linear Sound line - priced at $55. The ads prominently cite a review from Audio (August 1973, p.21), which measured the Model 50's frequency response at 45 to 16,000 Hz ±3 dB and noted that dispersion was excellent. Many budget speakers of the time struggled past 14 kHz, so that response suggests a well-engineered tweeter. No specific driver details survive.
Beyond that review excerpt, no independent test report, service manual, or specification sheet for the 50 is known to exist in the usual collector databases. Its cabinet dimensions, weight, impedance, sensitivity, and crossover frequency are unrecorded. The model was clearly produced in some quantity, enough to warrant national advertising, yet no technical literature survives. That makes it one of the less-documented speakers in EPI's early lineup.
Known details from period advertising:
- Original price: $55 each (1973)
- Measured frequency response (per Audio): 45–16,000 Hz ±3 dB
- Dispersion noted as “excellent” by Audio
- No other technical specifications survive
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