Sorry I don't have the complete spec's on them, I have requested them from the insider that emailed me from Yamaha when I purchased replacement tweeters! They are well worth $100 a pair! I would jump on anything under $50.
The woofers have a very deep sound at low volume. I have had mine since 1988, I play them very loud and make em pound! I had a 100 per channel Kenwood stereo, but now I have a Denon 60 watt per channel to push them.
Here are some spec's that I do know. If I get spec's from the manufacture, I will post them.
MINIMUM 10 WATTS
MAXIMUM 140 WATTS
NOMINAL IMPEDANCE: 8 OHMS
The cabinet is constructed of genuine vinyl veneer laminated over particle board.