I know this is an old thread, but it's still relevant and 805d3 vs 804d3 searches on google kind of only turn up this thread.
I have 802d3's in my house and wanted something nice for my rears in my theater. So I was looking at 805d3s. My local shop was out of those but loaned me a set of 804d3's while I waited (Chelsea audio beaverton is awesome). The 805d3's came in and for the moment, I have 802, 804, and 805d3's all sitting here in my house so I did some comparisons. My amps are all emotiva xpa gen 2.
The 804d3's I added to my theater which has 802d3's as main front left and right speakers. I play music in 2 channel mode with subwoofer enabled. With the 804d3's, I enabled all channel stereo and set up an anthem profile to disable speakers so that only the front 2 and rear 2 speakers were playing. In this configuration, the 804d3's did not color the tone much from the 802d3's alone but did seem to do a nice job filling in the rear presence. They are definitely a little brighter than the 802d3s. Having them for a week or so I was noticing some minor ear strain with the new set up and ended up having to turn the treble down 2db for music.
When the 805's showed up, I replaced the rears with the 805d3's (802d3 in front, 805d3 in rear) and immediately noticed they were not nearly as bright and were a bit warmer than the 804d3's. This must be due to the larger midrange driver (6.5" vs 5" in 804s)? I was able to restore the treble to default 0db and have not found any ear strain any longer. I had to up the rear levels 1db or so to match so the 804's seem to be slightly more efficient.
I lined up all the speakers in the front of my room, turned off the subwoofer, ran the speakers full range alone, and did some back and forth tests 802 vs 804 vs 805. Obviously, the 802d3's are going to win here. They have the full sound range and best staging. Going from 802 to 804 was a subtle change. The sound tonality/timbre is very similar. But the sound stage is nowhere as nice as the 802d3s. The 804's are definitely a little brighter than the 802s. Going then to the 805's (on stands), they sound warmer than the 804s even playing alone. The 805's treble is not as aggressive nor is the upper midrange. The 805 midrange and treble sound a lot more similar to my 802 midrange and treble. The 804's do have noticeably better low end but even that is subtle. The 805's seemed to stage a little better than the 804s. I did try to swap positions with the 804's and compare as well between the 805's and the 804s to see if that impacted the staging. It really didn't. The 804's probably would be slightly better with no subwoofer at all due to the deeper low end.
Turning the subwoofer back on, I find that I actually prefer the 805d3+sub over the 804d3+sub. The 805d3+sub sounds closer to my 802d3+sub than the 804d3+sub. The 805's, at least here, seem to image very slightly better than the 804s and are just a warmer less harsh sounding speaker. I ended up deciding to go with the 802d3's in front and the 805d3's in rear of my room. The 804d3s are going back. The differences I'm describing between the 804s and 805s are actually subtle. Both speakers sounded great. If I had only 804's or only 805s as my main fronts and never compared to 802 or such I would be very happy.
The music I tested is mainly rock style music with guitars, drums, and some european symphonic heavy metal that uses violins mixed with guitar (Epica, dark moor). I also have some various test tracks of some older rock that I keep around just for sound testing such as eagles hotel california and some rush which is mixed very well.
For movies, all the speakers did very well. I honestly couldn't tell the difference between the 804d3 or 805d3 for movies in the rear. My theater uses a single pair of rears (5.1.4 atmos) so the rears are pretty heavy duty speakers.
So for me, I would sum up:
If using a sub, 805d3 is a little better than 804d3. If no sub, perhaps 804d3 is a better choice. 805d3's a little warmer midrange. 804d3's a little brighter.
Last edited by markmon1; Today at 06:14 AM.