4 or 8 ohm connection for a 6 ohm speaker?

Thanks for everyone's input! Much appreciated!

Originally I had placed the speakers on the 8 ohm taps as recommended by the person who sold the pair to me...he had a tube stereo power amp. After listening to my setup at home on my Dynaco MK 3's I was never really satisfied. Is it possible that the bass was less than satisfactory and the highs were shrill? I still enjoyed listening to the speakers though and I did try positioning them slightly differently but left it that way until now. 

Today I moved the speakers to the 4 ohm tap and listening to the same music the bass was way way more full and the highs were less shrill...is that possible? I feel that is what I heard (my hearing isn't what it used to be). I do honestly think the music is better on the 4 ohm tap and I am sure I heard distortion when on the 8 ohm tap. My audio source was from a Bluesound Node 2i playing music from Tidal. 

I feel definitely more satisfied now and nothing blew up LOL. 

Bill from Nova Scotia

Very interesting, that's exactly what I experienced. I am trying to listen again like I did when I was a teenager. I really like the midrange from the Thiel's as I really enjoy female voice and jazz. Listening to the beautiful soundtrack from Philip Glass "Tales from the Loop". 

On a side note, Harbeth and Rogue Audio equipment are definitely on my wish list...but I am very happy for the time being though with the budget I have.

Wishing you all a great Sunday and week ahead!

Bill from Nova Scotia

Thank you Timo62 for the reply. I have them on the 8 ohm tap at present and will try the 4 ohm tap next. 

Tomic601, that makes sense to me as well...thank you. So glad I made the change to the 4 ohm taps today on everyone's recommendation because all around I now have a very pleasing sound output with a boost in the bass and a less hot high end. 

Next change will be the input stage on both mono blocks. 

Bill from Nova Scotia

Eric_Squires...the 4 ohm taps worked best for my setup. 

Hi jrwaudio! Well anytime you can get back to Nova Scotia it is even more beautiful...

The gentleman I purchased the two tube mono blocks from told me to always keep a speaker load on it when turned on so I was worried about trying a 6 ohm load on a 4 ohm tap initially but it all worked out in the end...4 ohm taps it is! Just being over cautious lol. 

Avanti1960, when you say I need to test carefully you are speaking of the sound quality? Would I do any damage to the output transformers by keeping a rated 6 ohm speaker load on 4 ohm outputs? 
I have settled on the 4 ohm taps as the sound is more complete at the low and softer in the high end. As long as no harm is done then the sound is great. 
Next change will be to upgrade the input or line stage I think it is called but that is for another thread :)

Best to you,

Bill