HELP FINDING TUBE PRE AMP

Ok will read the reviews, thanks for the post.

I dont need gain, just want to add tubbbbbbbbbbbbbbbbbe sound to my amp and speakers.  Maybe the xDuoo TA-26 OTL Tube Amp used as a pre amp ?

Trying to have headphone jack and tube sound.

Thank you for your reply that looks like an interesting option.  I'm also looking at Xduoo TA-26 which is a very well reviewed headphone amp that also serves as a preamp read of people having good success using it as a preamp.

Look promising good reviews from what I'm reading so far can't seem to find one anywhere though where can I get one?

I ended up getting a musical paradise M 301 Mk 3 deluxe.  Headphone tube amp/ 6.5 w for speakers.  Has some good reivews.