JBL MPA275 (c. 1982)
The JBL MPA275 is a professional power amplifier that appears in JBL's 1982 Pro Sound Sales Guide, placing it in the company's commercial/PA lineup of the early 1980s. The record on this model is thin — no original price, dimensions, or detailed specifications have surfaced — but the core fact is solid: it delivers 375 watts per channel in stereo, a figure confirmed by multiple independent sources.
The MPA275 was part of JBL's MPA series of professional amplifiers, which also included the MPA300, MPA400, MPA600, MPA750, and MPA1200. One Japanese vintage audio reference describes the larger models in the family as using "H class" power supply topology, but that claim is not explicitly tied to the MPA275, so it shouldn't be assumed. There is also a passing mention online of the MPA275 using an STK3150 integrated circuit, but that detail comes from a single component-listing site and lacks corroboration, so treat it skeptically.
One surviving owner described the MPA275 as a "superb sounding amp," which is about as close to period reception as the record gets.
What's genuinely known, in short:
- Professional stereo power amplifier, 375W per channel
- In JBL's professional lineup as of 1982 (Pro Sound Sales Guide)
- Part of the MPA series (MPA275, MPA300, MPA400, MPA600, MPA750, MPA1200)
Beyond that, the documentation trail goes quiet. If you own one and can add specs, dates, or photos, the archive would welcome the contribution.
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