Newbie sub crawl


I typed a whole tome in here and it popped so...poop.

anyway, short version is I bought a Rythmik L12 sub. I wanted to replace the cheap HT sub with something good for music. Deep, tight and fast.

i crawled the room and found my default spot to the right of the couch/sitting position to be good but not great. The front wall by the mains was deep and mushy and surprisingly the far end of the front wall, at the end of the record bins, just inside the dining room was less deep but more articulate.

i have questions though. The more I think of things the more I feel I did this wrong.

1. I turned off the mains so all I was hearing was the sub. It occurred to me later this might be a bad idea as obviously all will be playing during listening.

2. The bass is good here next to the listening position but it seems I can locate it due to the punchiness. I guess that’s the drawback to being close. Anyone else run one or more subs close to the sitting position?

3. As with speakers, my ear coming out 12”-24” from the wall tights everything up. Anyone running subs away from the walls? It’s a living room and there’s no WAF but it’s the living room so it has to make some sense.
Anything else I missed/brainfarted?
Also, my plan was to replace junky sub with good sub. Integrate good sub and add 2nd sub down the road. Just so that’s out there.

I’m incredibly happy with how things have progressed. I’m close to finishing this system and be relieved of expensive and stressful gear buying.

record bins dividing living room (left) from dining room (right)
https://i.imgur.com/qLt99x8.jpg

gratuitous system shot. It’s funny how empty it all looks. Doesn’t look that sparse in real life al though I do live like a peasant.

https://i.imgur.com/j5tvNO4.jpg

subs: new vs old. 42lbs vs 23lbs

gochurchgo
I read someplace (in several places, actually) to place the sub in your listening position and then "crawl the room."

Good luck and enjoy!

Tom
Not sure what your using but your can go here and downlod the Test Tone CD zip file which might be of help.

https://realtraps.com/test-cd.htm



1. I turned off the mains so all I was hearing was the sub. It occurred to me later this might be a bad idea as obviously all will be playing during listening.

Right. You want as many bass source locations as possible. They interact and add together. Locating subs based on how they sound alone, it will be different when the mains are on.
2. The bass is good here next to the listening position but it seems I can locate it due to the punchiness.
Right. And also the frequency. And because there's only one. Subs work much better- go deeper, more articulate, smoother, harder to locate- the more you have. One thing you can try, point the sub at the wall. At bass frequency it makes no difference but the wall will reduce the amount of higher frequencies you hear, and that is what is localizing it.

3. As with speakers, my ear coming out 12”-24” from the wall tights everything up. Anyone running subs away from the walls? It’s a living room and there’s no WAF but it’s the living room so it has to make some sense.

Its always like this. Bass is always strongest by the wall, that's where the pressure wave stops and reflects back. If you want more bass sit by the wall, or put the speaker by the wall. Want less move em out. Want definition do like I do, speakers and seat way out, subs right by the wall. Mine are out about 2" firing into the wall. 
Also, my plan was to replace junky sub with good sub. Integrate good sub and add 2nd sub down the road.

Good idea except don't replace, add. The more subs the better. 
https://systems.audiogon.com/systems/8367
Think 5 is a lot of subs? Ha! Not even! https://systems.audiogon.com/systems/8690#&gid=1&pid=2
Thanks @millercarbon I’ll redo the crawl with the mains on. The mains go down to 48hz and are very punchy but I’ll mess with it more.

As for the junky sub, I donated to my daughter’s music sensory therapy classroom. They run a cheap AVR and little satellites but no sub. They were thrilled and I feel like the class is less helpful without the bass but like all schools here they operate on a penny budget so I was happy to donate.

I’m really hoping to avoid REW and all that as I will get OCD over it. I feel like I did a good job with the junk sub but this one being not-boomy-but-way-punchy makes it localizable. I’ll flip the sub so the driver aims at the wall. Hadn’t thought of that.

thanks