I'm still using a pair of B&W D-110...don't know how old they are, but at least 25 years or so. They are powered by an old Radio Shack 100w/side stereo amplifier that can be set to flat very easily.
Also have a cheap old Panasonic boombox that I use to test out recordings...if they sound good on it, then they'll sound good on anything.
Ian
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Yamaha Tyros4, Yamaha MS-60S Powered Monitors(2), Yamaha CS-01, Yamaha TQ-5, Yamaha PSR-S775.