Not vintage, but you'd have spend a lot more to better it-
http://www.templeaudio.net/bantamgold.html
A few here use them. There are mono blocks if more power is required.
“Music has always been a matter of energy to me, a question of fuel. Sentimental people call it inspiration, but what they really mean is fuel. I have always needed fuel. I am a serious consumer. On some nights I still believe that a car with the gas needle on empty can run about fifty more miles if you have the right music very loud on the radio”
Hunter S Thompson