JBL HP-520
Almost nothing is known about the JBL HP-520. The model name doesn't appear in any of the period JBL literature, product directories, or service documentation that survives in the Archive's reference collection. HiFI-Stereo (February 1993, p.35) ran a test report on a speaker - possibly the HP-520 - that measured bass radiation around the full cabinet periphery. It withstood roughly 600 watts at 100 Hz before the cones reached mechanical limits. The review never names the model, so even that fragment can't be firmly tied to this unit.
Going by the model number and the era of the one review that may relate to it, the HP-520 was likely a JBL loudspeaker from the early 1990s. No specifications, design details, production years, or pricing have been located. The Archive has this page because the goal is an entry for every vintage JBL model, even when the record is essentially blank. What little is certain: JBL made it and sold it as the HP-520.
- Brand: JBL
- Model: HP-520
- Type: Likely a loudspeaker (no confirmation of driver complement or enclosure type)
- Documented facts: None beyond its model designation and possible mention in a 1993 HiFI-Stereo test report
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