Blaupunkt BPA-430
Little is documented about the Blaupunkt BPA-430. The record shows a separate car audio power amplifier, included in a survey of such amplifiers by Julian Hirsch in HiFI-Stereo (May 1984, p.51). It was the first model listed in a roundup that also included the Proton 250, Alpine 3502, Harman Kardon CA260, and others - a dozen separate amps tested together as a group.
Beyond that listing, no specifications, design details, or production run information appear to have survived in the period literature. The same HiFI-Stereo article (p.54) described the test methodology: rated power at 20, 1,000, and 20,000 Hz, sensitivity for 1 watt into 4 ohms, and A-weighted signal-to-noise ratio. No individual BPA-430 measurements are preserved in the available chunks. The BPA-430 is also absent from Blaupunkt's own product family records covering the same era.
It was a car amp from Blaupunkt, reviewed in a major 1984 amp survey. That is all that is currently known.
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