Originally Posted by Skunkbeard
Please test "Movie mode" with H7s for discreet rears effects.
The majority sans 2 reports here can not get discreet rear effects in "Movie mode". Personally, I think that's just how the bar acts in that particular mode, rears or not.
Hopefully they made later produced versions of the bar work correctly in "Movie mode", as those saying that they do work correctly are new reports here.
Even if they are not discrete in "Movie mode" for the majority here, I definitely recommend rears with the SJ9 as long as you have a stable connection.
If it's not stable, they are junk. For me, that meant Etherneting up everything. YMMV depending on ones router, etc.
Long time AVS Forum browser/first time poster. I usually only browse the forums and never post because I can 99% of the time find the information I need fairly quickly, but I felt I should chime in on this one.
My set up consists of the following
LG SJ9 with 2 MusicFlow H7's as rears
Sky Q 2tb
Apple TV 4K
And this week I will be adding a dedicated UHD player as I am not overly impressed with the UHD player in the Xbox One X
All devices are running the latest public release firmware for my region (U.K.)
Firstly, the lip sync issue from external devices via ARC discussed many times on here and other forums is real and completely unsolvable for me unless I tone down audio quality from DD+ to PCM or Stereo, which for me defeats the object of having the soundbar in the first place. My conclusion was the TV's Audio Return Channel is causing the audio delay so I got around this by purchasing a relatively inexpensive HDMI 2.0b 5 port switch rated for full 18Gbps which works perfectly. Here in the U.K. I found my choices limited for such a switch, but the Smartooo 23051 I have does the job well even if there is a slight delay on input switching. In the U.S. there other options from Monoprice, and I have read good things about the Sewell SwitchDeck too.
Now onto the SJ9.
I have this all set up in a what I would call a medium sized room, 13' x 15'. I sit approximately 8' away for viewing. The TV is wall mounted with the SJ9 directly below and slightly forward of the screen to avoid any interference to the upfiring speakers. I have heard dedicated Atmos set ups before, and while the SJ9 cannot compete with individual speakers placed around you, I found it gave a fairly immersive experience from in front and to the sides, and good effect from the height channels. However, sounds from behind were severely lacking which is why I set about trying to get hold of a pair of H7's. Here in the U.K. I found them extremely difficult to get hold of and they are not cheap!! So when I did decide to plump down the cash on them, I can't tell you how annoyed and disappointed I was when I couldn't get them to function at all properly.
The SJ9 has always been connected via ethernet (all my devices are routed through an ethernet switch), so I initially set up the H7's wireless. No dice. The connection was so unstable in surround mode, I would get constant crackling noises and sound delay. So I broke out the LG wireless bridge that came with the H7's, factory reset all the speakers, and tried connecting wireless with that thinking that maybe the Sky Q hub was interfering with the LG's MESH network channels. Again, no dice. Unstable connection in surround mode, crackling and audio delay. So I purchased some flat ethernet cable and hardwired the lot, and PRESTO, flawless connection, no crackles and sound all in sync. I can only assume that with so many devices in close proximity, the wireless connection just had too much interference. With ethernet I have no such issues, and with the flexible flat cable I have managed to route it to the rears so it is not at all visible. And now it is working as it should, the room is completely filled with sound, the experience is so much better!
So with the way I have it set up, I would hazard to argue that it is the best possible way to get the absolute most out of the soundbar and rear speakers. All devices go directly to the HDMI in port on the bar, and H7's are hardwired. Apple TV 4K is set to best possible audio, Sky Q is set to DD+, and Xbox is set to Bitstream Audio/Dolby Atmos (which in itself is buggy, but that's an Xbox issue).
!!!MOVIE MODE (for me at least) DOES NOT DO DISCRETE REAR AUDIO!!!
With Movie Mode, any content I play, if I listen to the rear channels the sound is duplicated in both rears, i.e. the same sounds are coming from both speakers. Switching through ASC, Bass Blast or Standard gives proper discrete rears, but going back to Movie just duplicates both rear channels into both rear speakers again. To test this, I downloaded some proper surround sound test tones (I cannot post links, but I found them on a site called Digital Theatre). I have tried Dolby True HD in both 5.1 & 7.1, and DTS HD in both 5.1 & 7.1. Both the Dolby and DTS 5.1 soundcheck test tones performed as expected, individual channels playing the correct tones in the correct speakers in ASC/Bass Blast/Standard. In Movie the both rears played both rear tones. With the Dolby and DTS 7.1, in all modes except Movie, the front and centre channels were correct, the H7's grouped the right surround/right rear & left surround/left rear. In Movie, the right surround/rear & left surround/rear all played through both H7's.
Atmos tracks from Netflix, Sky Q, UHD Blu Ray and demos all play and perform exactly how I would expect so absolutely no complaints there I'm happy to say.
All in all I'm happy with the way it all works now. I use Movie at night when I don't crank it up so high and don't have the H7's connected, and when I want to blast it out, I connect the rears and set it to ASC or Standard (Bass Blast is a bit much for my enviroment).
Oh, my SJ9 has a build date of Jaunary 2018, so I guess it is a "newer" unit, not that I would think that makes a difference, they all use the same firmware as far as I'm aware.
I apologise if this post is a bit long winded, but I wanted to express how much testing I have done, how I eventually got it all set up and working correctly, and my discoveries once I had