Should I upgrade from REL/510 subwoofer to REL/812 subwoofer?

I agree with @gkelly and others.

I have a stereo pair of REL S/510’s in a room with similar size and can’t imagine needing more. There was a big difference going from one sub to the pair of S/510’s. The stereo pair really pressurizes the room much better. I think you will be very happy with the pair. Mine are placed in each L and R corner, which worked best for my room. 

Agree that 2 subs is the way to go.  I had a similar experience with my SVS subs.  Started with one and I’m now happy with the sound with 2.

I would.

2 subs key

Have had s/510 x 2

2 was magical compared to one

Which was still better than none

1+1=3 

It is!

@ghdprentice 

Well it seems two is the magic number.

Thanks.

Yep... a second sub. While it will be good for explosions on TV... most importantly it will extend the sound stage of your two channel system. I

I have two S/510 as a stereo pair (one on each side of my towers). They work great for two channel, but my room is large and I'm on a concrete floor, so they aren't quite what I want for movies (explosions, etc). 

I had a decent SVS sub on hand, so I've hooked it up in the back of the room with Bluetooth (a decent sender/receiver with little latency). It only runs when watching movies.  It works well.  You might try that if you have room. 

@gdnrbob 

Thanks.  You got right to the point and were very helpful.

@gkelly Thanks.  Others share you suggestion too.

@johnto Thanks.  It seems everyone agrees that two are better than one.

Not familiar with your subs but I went from 1 to 2 and it does make an appreciable difference. I place one on each side behind the main speakers.

Stand firm and kick your wife’s sewing machine out of the room lol. I’m sure you would get some benefit of stacking but nothing close to what you would get if you went stereo. Also noticed the white, are $1000 off. Nothing a $2.99 can of spray paint won’t fix. 

Though I don't know your room layout, I find it hard to believe that you can't add a second sub. Even if they aren't in a symmetrical placement (which, I think would actually be beneficial, as you could eliminate room nodes). 

Some might say stacking, but for me, I wouldn't- once again, you might just aggravate room nodes.

I haven't looked at the differences between the two REL models, but considering that they should only be adding to the lower frequencies, I doubt the newer model will provide any meaningful improvement, especially at the added expense.

Given the fact that you currently enjoy your current system, I wouldn't bother with the sub upgrade. That $1500 could be applied elsewhere to more discernable improvements.

My 2 cents...

Bob

@gkelly 

Thanks for your feedback.  I will seriously consider this option.  If I’m reading between the lines, if a second sub is not practical because of my room layout, I’m inferring that I shouldn’t bother with the S/812 upgrade?

Also, I believe the S/510’s are stackable.  Would you consider stacking two 510’s a worthwhile option.  That might be a more practical option for me giving space limitations.

Thanks!

🎶

I am sure you have done their speaker pairing on their website. Personally, before upgrading, I would spend that $1500 figuring out how to add a second sub.