JBL SE-400
Not much is documented about the JBL SE-400 itself. The period record is mostly about the SE400S, the variant JBL's late-1960s electronics line is remembered by. The SE460 was part of the same family.
HiFI-Stereo (October 1968, p.44) published bench measurements of the SE400S with 8-ohm loads. It lists rated power output at 60 watts and plots total harmonic distortion and 60/7000 Hz (4:1) IM distortion at rated, half-power, and low-power levels. In August 1970, HiFI-Stereo (p.40) noted that the SE400S, like the SE460, could be ordered with optional plug-in equalizing boards that adjusted its response. That plug-in EQ option is the one design detail the period press attaches to this line. The SE-400 itself is not specifically described in the pages available to the Archive.
No production years, original price, or full specifications for the SE-400 have turned up in the Archive's sources. A manual, brochure, or period ad for the SE-400 itself would fill a gap in the record.
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