Speaker Impedance ... nominal 6 ohms

Kossi...yes you can use either amp to drive these speakers. On the amp that has 4ohm and 8ohm connections, try them both and see which one sounds better to you. You should get a little better bottom end control through the 4ohm taps but try them both and see which you prefer. Good luck.

Agree witth Cmalak. Just be aware the 8 ohm use mmay make your amp run hotter. (than it would using the 4 ohm tap). and if you use the amp with only the 8 ohm output, it may run hotter also. So watch the temps of your amp and see if you think it is getting too hot.
(no other damage is likely, and if it does NOT get too hot, you are probably going to be fine)

Hi Kossi

Thanks for posting a thread about this topic. I always wondered about this. I always thought that if your speaker had a 6 ohm nominal impedance that either your receiver (if possible) would have to be set to 4 ohms or the 4 ohm taps on a tube amp had to be used. Good to know.