Yamaha NSA-825
Almost nothing is documented about the Yamaha NSA-825. The model shows up in one period equipment listing from HiFI-Stereo (1993, p.198), and the entry is garbled. It may mix up the NSA-825 with other Yamaha models. The listing suggests a passive speaker with a crossover at 3,500 Hz, a frequency response of 45-25,000 Hz, sensitivity of 87 dB SPL at 1 W/m, and continuous power handling of 100 W. None of that can be pinned confidently on the NSA-825. The finish was offered in black ash or mahogany.
Past this one OCR-corrupted directory entry, no other specifications, production years, original price, dimensions, or historical context have been located. No other period publication or catalog found so far mentions the NSA-825. Whether it was a bookshelf model, a floor-stander, or something else entirely is still unclear.
Known (uncertain) data from the HiFI-Stereo listing:
- Power handling: 100 W continuous average (possibly)
- Frequency response: 45–25,000 Hz
- Sensitivity: 87 dB SPL at 1 W/m
- Crossover: 3,500 Hz
- Finish: Black ash or mahogany
If you have a pair of NSA-825s or original Yamaha literature that clears up this model, the Archive would like to hear from you.
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