Super Loudspeaker test
1977

Here are excerpts from a 1977 Stereo Sound gigantic loudspeaker test.
Click the thumbnails below and the results open in pop-ups so you can put two loudspeakers side by side and easily compare the results - ain't I thoughtful ?
I have made a selection of the units tested to avoid this taking fifty pages ; however, in time, I will add a few more.

Among the monitoring components used for the test were a Yamaha CA-2000, Luxman SQ-38FD II, PD-121, 5C50 and 5M20, Ortofon MC20, Audiocraft AC-300C, Victor TT-101 and UA-7045, Yamaha C-2 and Pioneer M-25 ; also a Mark Levinson preamplifier. The measuring rigs were exclusively from Bruel & Kjaër.

Graphs show, from top to bottom :
- third octave response with a greyed-out zone corresponding to room resonances up to 200Hz,
- horizontal dispersion,
- vertical dispersion,
- impedance curve,
- SPL for 1W at 1m.

The overall results show that the most linear loudspeakers aren't necessarily... the usual suspects !