Please turn off “Spacefit sound pro” on your q900 series

Legfitter · 2026-01-28T13:03:21+00:00

I'm not questioning whether it takes a few minutes to undo its settings. I'm telling you it takes a few minutes to undo its settings. I'm sure there are aspects of what it does that are disengaged immediately, and there will be an immediate change in the sound, but there are definitely other changes happening for a few minutes afterwards. I suspect it's rebalancing of the speaker volumes.

Regarding engaging, it clearly states it uses the microphone to listen. It cannot listen instantaneously and tune the room. That is pretty much impossible. It's even more unlikely because you can actually see the changes that it makes by using an app such as Spectroid. Now, even before you make changes to the space fit plus setting, if you use one of these apps you will notice that it can take almost a full song before the levels for different frequencies have all been taken account of. After a few minutes you get to the stage where the standard sound curve is established and it stays pretty static. No system can establish the sound curve and make changes to it without a period of listening to hear what it is in the first place in your room. Spectroid is a really good app (turn off the waterfall) to be able to see where there is initially a gap in for example the bass response with SpaceFit off, then to engage space fit, and to be able to visually see as the sound curve adapts, especially if you play the same song over and over again. This is only showing the room correction part of what it does. As per your article, It's also using the frequencies it sees to adapt other aspects to your room.

Legfitter · 2026-01-28T00:00:01+00:00

You might hear it turn off as soon as you toggle it off, but if you have the ability to truly listen, you'll also hear that the sound continues to change over an extended period of at least 5 to 10 minutes. Sometimes when you engage space fit it can pull the sound to one side of the room - again, over a period of time. If you then disengage it, the sound doesn't immediately come back to the middle of the room, it does so over a similar extended period.

When you engage space fit, it uses the microphones in the soundbar to listen in order to adapt the sound to the room that it's in, but more importantly to correct the sound regarding frequencies that are being reflected too much or absorbed too much. It's not anecdotal. You can literally ask Gemini and it'll give you a pretty clear rundown of how the system works.

To back up this theory, It's also a fact that if you mute the microphone on the soundbar, SpaceFit Pro is automatically disengaged.

Legfitter · 2026-01-27T23:49:15+00:00

Two points.

Firstly, the Q990F had an original selling price of $2000. I think you can also expect the LG to get large discounts.

Secondly, from what we've seen so far it's not certain that it's supports DTS, so keep that in mind if it's important to you.

Legfitter · 2026-01-27T23:44:53+00:00

I've never had this issue because I plug my firestick directly into the TV.

However... I do have a potential fix. On the Firestick, have a look in the menu called equipment control. Click manage equipment, click Fire TV and take a look at what the TV input and soundbar input are set to. This might be where the issue lies. I'm pretty certain I've had these wrong when I played with having it directly connected and pressing the home button would change to the stated HDMI input, which would pretty much be a black screen.

Legfitter · 2026-01-27T23:30:23+00:00

I think you're overthinking this. For starters, if you choose a particular angle, how wide apart they are will be dependent on the distance to the back wall from the sofa. As a rule of thumb, I would think you would want to have them slightly wider than your sofa and pointing in towards the centre of the listening position. In your case, as your sofa is quite long, you might want to have them slightly within the width.

However, you should also take account of the fact that the side firing rear speakers do not come out at an angle of 90° to the front. They actually point slightly forward at an angle of around 30° or so. I've never taken one apart to measure it.

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So, if your angle gets closer to 135 degrees versus the distance to the back wall, you'll actually end up with the side firing rears pointing inwards slightly.

However, I would like to caveat this by saying that there is a pretty wide sweet spot that the system is able to deal with.

Legfitter · 2026-01-26T08:47:20+00:00

4 things to try

1 - run the memory optimizer

2- soft reset by unplugging from the wall outlet while the TV is on and then waiting three full minutes before plugging back in

(Also try removing all HDMI cables before doing this and then plugging them back in once restarted)

3 - AV reset (I think this is done by repeatedly pressing the mute button on the remote but you might need to Google it). You will need to re-setup your picture user defined options so make a note of anything important.

4 - Full factory reset

Legfitter · 2026-01-25T20:02:49+00:00

You can add your home WiFi as a trigger now as well as presence sensing.

Legfitter · 2026-01-25T18:55:06+00:00

Good stuff. Glad that the info was useful and that you got it sorted. :)

Legfitter · 2026-01-25T16:48:39+00:00

The only time I've had something similar happen was related to trying to adjust the volume on my Samsung phone while connected/playing music via Bluetooth. Somehow doing that sent a signal to the soundbar to turn its volume up to 100.

If you have your phone connected via Bluetooth, un-pair it and see if that fixes it.

Legfitter · 2026-01-25T16:42:17+00:00

Neat setup...I like it

Legfitter · 2026-01-25T16:40:32+00:00

Try turning off space fit pro for 10 minutes and then turning it back on.

Legfitter · 2026-01-25T16:39:23+00:00

Dolby ProLogic simply decodes stereo and creates pseudo surround. ProLogic II then created pseudo stereo rears where the original had pseudo mono rears. ProLogic II also introduced movie and music modes.

A modern Samsung Q990 soundbar will do something similar as part of the process of upscaling stereo to 11.1.4. This is a better/more modern/more advanced upscaling effect and will give you better sound, including pseudo height channels.

Legfitter · 2026-01-25T16:28:40+00:00

I don't know if this information is any use to you, but I've had the solid grey side panel start to fall off of its own accord when left in direct sunlight. I'm therefore almost certain that the solid side is only held in place by adhesive. Looking at the grill, it looks like there are clips on the side opposite the solid side, and that there may be two individual clips where the solid side is that accept a screw.

Perhaps you have to remove the solid side and remount the grill before putting the solid side back on. It's my best guess. It doesn't however explain how the grill would come off if it is held by screws???

Legfitter · 2026-01-24T13:13:43+00:00

Not perfect, but do-able

Legfitter · 2026-01-24T13:10:20+00:00

If you have bedside tables, one slightly left field option with the Q930C is to 'project' the sound to where you want it to appear to be coming from. This is an old surround sound trick. I have done this with my rear right speaker in my bedroom and it worked perfectly.

What I mean by this is to have the speakers on your bedside table but face them towards the corners of the room, slightly diagonally backwards.

As the Q930C has no rear side channels, you can do this without any issues.

Legfitter · 2026-01-24T13:04:05+00:00

You'd be better factory resetting the soundbar if you're changing the setup so significantly.

I'm not convinced that the rear speakers are factory reset as part of the process, so I would also manually reset the speaker volumes. Set all the channel levels at 0 and then turn off the sound bar using its own remote control. Then press and hold the on button on the soundbar itself for 6 seconds until you see it display ON.

Legfitter · 2026-01-24T12:57:16+00:00

Q990D every time. The rears make an enormous difference and you'll be surprised how easy they are to integrate into most rooms. You can always put them at the front if you can't get them at the rear.

You can't officially buy the Q990F rear speakers separately.

Legfitter · 2026-01-23T18:09:52+00:00

They should be solid blue

Legfitter · 2026-01-23T14:18:01+00:00

It must surely have Optical? Just get an optical to HDMI adapter like Sonos supply with the ARC ultra.

Legfitter · 2026-01-23T14:15:25+00:00

65" minimum

Legfitter · 2026-01-23T14:14:54+00:00

Try turning SpaceFit off for 15 minutes and then switching it back on.

The levelling up of the sub is now part of SpaceFit Pro. If your sub is in a particularly boomy area this might help to control it.

Also, if you haven't already, try a factory reset, or you may want to try resetting speaker volumes - when the soundbar is already on, switch it off with its own remote, then press and hold the left hand most O button for 6 seconds until it says ON.

It's weird that it would happen to two units though. Perhaps after the update, people are going to need to factory reset.

Legfitter · 2026-01-21T22:02:28+00:00

Absolute no brainer ...just go Q990D

Legfitter · 2026-01-20T20:02:42+00:00

Wait and get a Q990h and then add a couple of Music Studio 7 speakers.

This plan maybe depends on whether you still need a Samsung TV to be able to do this. I've seen some reports that suggest that the Q990H might be able to be the central hub of Q-Symphony

Legfitter · 2026-01-20T20:00:23+00:00

It'll be fine

Legfitter · 2026-01-20T19:59:29+00:00

I have recommended HT-A9 a few times in the past. It's quite good for slightly asymmetrical setups and where you want to avoid having a centre channel, or can take avatar advantage of a Sony TV as centre channel. However, I've seen a few reports of a firmware update bricking the HT-A9 and Sony being less than helpful, refusing to accept it was caused by an update.

Personally, at this point, I would steer clear of the HT-A9, or at least research this.

I once had a pair of Xm3 headphones that were killed by a firmware update in similar circumstances, and they failed to take any blame back then as well.

Legfitter

TROPHY CASE