JansZen Z-412-HP (mid-1970s)
Surviving information on the JansZen Z-412-HP is thin. It was a loudspeaker sold in pairs - the name turns up in two period audio publications in the mid-1970s - and beyond that, the record is just those two traces.
The first is a speaker roundup in High Fidelity (1976, p.95). The Z-412hp is in a listing there next to the JansZen Z-210a and Z-410, and also the Infinity Monitor II and Interaudio Model 1000. The surviving OCR of that page also carries a bass-reflex spec block for one of the listed models. The column layout is too jumbled to pin it on the Z-412-HP with any confidence.
The second trace is a classified ad in Audio (October 1977, p.198). A pair of Z-412-HP in mint condition with original boxes, and the seller asking offers over $225. That puts the used-market floor at no less than $225 for a clean pair, roughly a year after the High Fidelity listing.
Even the model name is slightly unsettled. Period sources write it both "Z-412-HP" and "Z-412hp", and nothing in the surviving material explains the "HP" suffix. The High Fidelity listing does place it in a wider JansZen speaker range with the Z-210a and Z-410. Production years, original price, and design details remain undocumented.
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