Yeah ... those are sweet. I came real close to picking up some of the littler siblings - the SS-M5 - back in '06 or so, but opted instead to get the B&W CDM-7 SE's.
I'm a whore for British speakers...
Those speaks were Made in the USA.
That ! I never knew !
1 million in cold hard Yen 20 years ago was worth around 10K USD clams !
Here's the scoop on the M9's :
http://www.thevintageknob.org/sony-SS-M9ED.html
Type : 4-way
Bass-reflex 5 drivers (SS-M9ED) 4 drivers (SS-M9)
Drivers : 2x 20,3cm bass 1x 12,7cm mid 1x 2,54cm high 1x 2,54cm super high (M9ED)
Frequency response : 26Hz...100Khz (+/- 3dB ; M9ED) 26Hz...70Khz (M9)
Impedance : 4 Ohm nominal 2 Ohm minimum
Sensibility : 86dB / 2,83V / 1m.
Max. SPL : 113dB / 1m. / full range / per pair
Min. / Max. power source : 40W / 400W
Repartee : 200Hz 2Khz 22Khz Internal network : 24dB/oct.
Binding posts : 2-way for bi-wiring/bi-amping
Bass-reflex vents : x c. 20cm diameter lower back of the enclosure
Dimensions : 112,5 x 40 x 55,5cm
Weight : 58kg.
List price : 1,000,000¥
Features :
Non-parallelipedic enclosure
Polypropylene bass & mid cones
Glass-epoxy internal network base
Polypropylene caps
Copper rails
Special damping materials