4 ohm (or 6) Bookshelf speakers. Pass Labs 30.8

The Aerial 5t is a 4 ohm speaker. BTW, why do you feel that you need a 4 ohm speaker? The impedance changes with most speakers!
https://aerialacoustics.com/5t/

Thanks everyone!  

Wow, this amp was underrated that much?  

Yogiboy - I read in forums from individuals (who may have been uneducated or misinformed) that to get some volume/power get a 4 ohm speaker, that this would bring the output to 60w/ch.  To be honest, researching this amp has been really confusing. I don't know much about ohm's at all.  And now I'm understanding that the amp really makes 100w/ch at 8 ohms fully class A.  SMH, guys like me can't read between the lines with this high tech stuff!

Jackd - Yes, I read that too!  But I just didn't understand it.  I mean, the underrating is so much, that i almost didn't consider it because I was feeling it wouldn't work well with many speakers.   Their power specs are frustratingly misleading and seems weird.  So it stays class A all the way to 100w/ch?  That's plenty for me, but what gives?  Why such the variance?  

So I think the question I need to be asking, just so I am clear, is: are there types of speakers I need to avoid?  (This whole underrated concept and 4 ohm preference talk is making this confusing!  ha)

Also, to be clear, in 4/8 ohm, it stays class A  to 100w/ch?

What about efficiency?  I read that it prefers speakers above 85 for sensitivity?  

It sounds like I should have no issue driving any book shelf speaker, at all, or floor for that matter.  

Any catches, things I might not be seeing?  

Thanks again everyone!

It stays in class A at it's published rating.  Somewhere above those ratings it goes into A/B and continues to 130 and 195 wpc at 1% distortion.  Best thing you can do short of actually testing the amp with speakers is to read all the reviews of the 30.5 and 30.8 and see what speakers that used with them.  Unless your listening room is cavernous and you intend on playing to concert levels then the 30.8 will push most any bookshelf speaker you find to "reasonable" levels.  

@mplstereo: i have the xa30.8 and it sounds good driving 8 ohm loads. However, when driving difficult 4 ohm loads it becomes a whole new amplifier. I much prefer 4 ohm speakers with mine. I have had amazing success with the elac uni fi or adante range. For the money those uni fi speakers amd this amp are amazing.  

I have TAD ME-1 and technically they are bookshelf size although I think they come with the stands. The sound is incredible.