Dayton Audio HTA100BT integrated

I bought this unit about 3 weeks ago and have been very happy with the sound, looks and flexibility. I bought a pair of Acoustic Research AR-7 Speakers and refoamed the woofers and the unit makes them sound great.
The only down side I hear is the fan noise does distract when you are turning up the unit to push the bass volume.

Would anyone be able to tell me what bluetooth codecs are supported on this unit?  I checked website, manual, and called PE/Dayton but no one can tell me.  Hopefully its not just SBC/aptX ?  Thanks!

Why would anyone want a 2 way speaker if you can have a 3 way tweeter ,midrange and bass I got speakers from Dayton I think $64 and my granddaughters are jamming to them a 15 yr old and 17 yr old so to me Dayton is like Pyle ,I need a 4 channel Amp for my speakers I think the Sony CS5 will be on sale for $73 again they really need 100 hours burn in I played pink noise all night with them and yesterday they sounded great put them in for bedroom ,lots of these guys are true audiophiles who would never  look at budget speakers but they give us great info 

Is the Dayton HTA100BT a hybrid amp for under $200 ,a friend who only cares about sound loves it and I dont think he cares about price you should watch Z on youtube here https://www.daytonaudio.com/product/1680/hta100bt-hybrid-stereo-tube-amplifier-with-bluetooth-usb-au...    Dayton makes true vintage Audio even speakers from old VW radios that sound great if you havent been there i left a link

Okay, am I the only one who notices some kind of noise gate circuit on the AUX in? I saw one other person say something in a post I can’t find now 😶. When the signal gets very low, the noise gate kills the audio completely, and then is very slow to turn it back on. Like, it cuts off the first half second of each song. And forget about listening to dialog on it. It’s completely silent for the first half of every sentence. No such issue on the optical in, but then again, a digital in wouldn’t need a gate, would it? Which begs the question, what in blazes is a manufacturer doing by putting a noise gate in a hi-fi amp, rather than addressing the source of noise? (I forgot to mention, this thing is noisey. Anyone else???) It’s like an admission of guilt. Anyway, I’m contacting the vendor. Maybe my unit is faulty.