harman kardon citation 16 amp?????

How do some of you older audiophiles like this amp? Is it a good amp for driving psb gold speaker? I have a tube preamp and i am not sure how it will perform with it. I can pick it up for around 300 bucks, is this a decent deal or too much for this vintage amp? Sorry so many questions i just am on the fence about purchasing it. Is there any way to check it out with a volt meter before buying it. I am no electrician at all but with some guidance i may be able to check it out further. Its a all black face and doesnt have the v pattern lights like most ive seen. ANy way to tell what the amp is? Just says citation sixteen on the front with 2 leds and a toggle switch. thanx for the info, much appreciated