I'm using the projector against a white wall since I am forbidden by The State to attach anything to the walls. I can't speak on how this projector compares to others in it's line or the market but I can say it is easily bright enough to strain your eyes and I have to mitigate the units brightness with Windows 10 Night Light settings and Microsoft Edges Night Eye extension in conjunction with tempering the A300 via it's own menus. So right now the colors at night are warped toward red since turning down the brightness shrouds most of the detail in media I have to keep the brightness as high as I can and use settings on my inputs to temper the A300 at this early juncture.
If you look at the vendors reviews for the A300 there is a gentleman from Ireland who shows you a short Youtube clip of him using it in daylight conditions and it indeed does look LCD bright like. I too afraid to post the Youtube link here since AVSforum fried the last guy who did so.
The unit appears to autofocus itself and fine adjustments are adequate although they are on a part of the menu which is not translated. One of my favorite thing is the SPDIF out. My previous projector didn't have one so I had to use an HDMI audio extractor which wouldn't decode DTS. The A300 does decode DTS (not sure the maximum channel count DTS version though) and I can consequently shoot the audio out of the projector via optical to an APTX-LL bluetooth transmitter to feed my bluetooth headphones of choice for anything I want noticeable bass frequencies in, the Denon AH-GC20 which are best in class as far as I've been able to establish having gone through:
1. Denon AH-GC20
2. Plantronics Backbeat Pro 1
3. Audio Technia WS990BT
4. Bang and Olufsen H9
5. Plantronics Backbeat Pro 2
6. Bose Quite Comfort Q35 i
7. Sony XB950N1
8. Nuraphone G2
That is the ranking I assessed these bluetooth noise cancelling headphones using Windows 10, Peter's equalizer APO, Tidal HiFi streaming, and a completely digital sound path implemented with a Soundblaster Omni soundcard for USB to optical and the same APTX transmitter I'm still currently using.
Maybe I will open a separate thread discussing NC headphones since people default to Sony's mx series or Bose Quite Comforts. I'm haven't heard the popular Sony's because I specifically am after something that is going to be able to pump bass and anything monitor like is not what I would use for media. I have HiBy and Sony Android DAPs and IEMs for that kind of stuff and wouldn't use bluetooth anything for critical listening. I can say I found a set of Quite Comforts a fellow student forgot in the bathroom one night and they are the only headphone on my list that I had to turn DOWN
the bitrate for on my computer in order for them to receive the signal. They are only rated above the Sony XB950N1 for build quality. Note the Audio Technicas listed above have the most fidelity and are the most accurate but surprising, besides being marketed as "Solid Bass" actually have very little bass, most certainly not embellished in any perceivable measure, and that marketing designation is a misnomer. The Audio Technicas are the highest fidelity bluetooth headphones I've heard and are several leagues above Quite Comforts. I can only deduce that if the Bose are seriously competing, irrespective of fanboy hype, with the mx-series Sonys that they resolve better than those too.
Anyhow I might erase all this headphone stuff and put in a new thread. The point is I'm disinclined to use the inbuilt speaker of the A300 since I'm in a dorm room and habitually respect my fellow customers / peers / neighbors...
P.S. What I've learned since getting this unit which is my first 4k display is that for whatever reason streaming services are disinclined to stream 4k over desktop internet browsers even if your hardware can handle it and much like HDR, USB-C, Xioami ecosystem UST projectors, and Display Port there is a great deal of confusion pursuant to lack of specificity on the industries part regarding these tech products. I'm under the impression that I will need a TV box like a Roku, Fire stick etc to get the most out of this projector. I'm set on a Nvidia Sheild TV, which unlike my 6th generation Intel laptop can also do HDR although I have compunctions about spending full original retail price for a 4 year old device even though in an ecological sense it is good that it has held it's value since then because they don't end up being haphazardly desoldered in India or Africa by peasants for subsistence.