Third version of the CA-1000, the CA-1010 was a CA-1000III in Japan.
The bigger one (CA-2010, aka CA-2000 in Japan) had some upgraded parts and more power for an even better 'speakers control. Both units are keepers (and sleepers) - great drive & finesse, if housed in a somewhat heavy-ish design.
I really regret selling mine.
The variable loudness function inaugurated on the original CA-1000 was here kept for the lower ranks (CA-810, CA-710), only to reappear as a regular feature of Yamaha's amps in '79/80.
The power transformer star-shaped heatsinks were shared with the contemporary B-2 V-FET power amp - another bestseller.
Thre are ooodles of them 1000, 1000II, 1010 / 1000III and 2010 / 2000 in Japan - real bestsellers.
Click the USER to see nudies of my ex-1010 (no, not my ex !) and read a complete technical desciption by Zeljko Nastasic !