Despite the repeated production of very visible firing squads the size of Florida, Sansui occasionally spent time and money producing high-end loudspeakers, often with a very strong JBL flavor.
Explaining this is the fact that Sansui was JBL's distributor in Japan throughout the 1970s and very early 1980s - Sansui even made an SP-LE8T.
The SP-L800 has 30,5cm woofers, 8 Ohm ipmedance, 300W input capacity, 95dB SPL (1W / 1m), a 30Hz to 20Khz response and a crossover set at 1,5Khz which is full tilt where it can be really heard hard... but isn't : only a bit of a couple of dB rising at that spot.
The SP-L800 is the export version of the popular japanese SP-G300 original ; it was updated in 1979 as SP-G300II with an added 6,5cm horn-loaded tweeter taking things in hand from 10Khz up.
I don't know if that version was exported (as SP-L800II ?) but it sure was one step closer to JBL lookalike !
It seems the SP-L1000 is the bigger and export version of the nearly invisible SP-G500 launched in october 1977.
Two 38,1cm woofers with overlapping responses for super-wide bas & low-mid dispersion and consequent power handling, multi-port and rear-driven 10,7cm horn tweeter with an acoustic lens able to rotate vertically be 120°. 93dB of sensitivity (1W / 1m), 30Hz to 20Khz response and an input capacity of 500W.
The crossover is set at 1Khz.
The SP-L700 has 25,4cm woofers, 120° acoustic lens range, 150W input capacity, 93dB SPL (1W / 1m), a 35Hz to 25Khz response and a crossover set at 2Khz. The L700 is the export version of the japanese SP-G200.
Terminals allow three-way active powering and enclosures of all three models is (magnificent) "deep luster walnut veneer" (top and sides) and solid walnut edge pieces, plus casters and removable grille.
A real SP-G200 here.
A real SP-G300 here.
The SP-G300II at Mr Nisi's.