I can’t hear the Difference in the change the low pass filter or the volume on my SVS subs



sorry for the typo in my headline. I don’t know how to fix it.

I have to make major adjustments to notice the difference. Is that because of me or is that the nature of the beast? I suppose It could be my room as well. It’s not a problem so much as a curiosity.

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I only have one sub, SB-2000 Pro, and I keep the volume up as high as it will go, 0db.  I can clearly hear a difference on the low pass filter, especially between 40Hz to 60Hz.  I leave it around 50Hz and it fills in nicely.  You can adjust the filter in real-time with music playing.

How are you feeding it, line level inputs? 

Yes. Line level. 2 SVS SB3000s.

I settled on 60hz and 24 for volume, but as I said, I can adjust and don’t notice much difference, so it feels somewhat arbitrary that I have it set where it is.

Hey,

You need measurements badly.  The volume especially should be pretty obvious.

I think it's more a matter of VERY attentive listening, and after really learning what you are listening for. I run one SB-3000 and two SB-2000 subs and subtle setting differences can also be very subtle to discern by ear as well, especially when buried under other music, usually louder.

I'll sometimes run just the SB-3000 and go between pre-sets to A-B the differences and learn a bit more while critically listening (which is not too often these days...  :-)

I use measurements and feel they are very important in getting the best clean match and overall sound. A DSPeaker Anti-Mode 2.0 tames the room and speaker bass and the subs are dialed in later for a flat, measured in-room response.

I'm not sure if my positioning is unique or not but I'll describe it:

I'm set up in my living room.  My couch and love seat are in an 'L' configuration and the couch is the focal point.

An end table sits between the couch and the love seat.  I have the sub under the end table and it points away from the listening area making it a source for background and filling in.  There's a caveat however.

For the sub to sound its best and to 'disappear', you have to be at the focal point of my listening area.  I have the speakers tilted a slight amount.  If you leave the listening area, then the sub no longer disappears.  As a matter of fact, its presence  is very evident.

I mentioned the sub points away from the listening area so behind the love seat, you have a birds eye view of the sub's grill and it is very noisy back there.  The only one that does not seem to mind is my dog lol

Let me start by saying I've incorporated a SVS Pro2000 sealed box sub into my system. My Raven integrated has a sub out which allows an 80 db filter to keep my Klipsch Lascalas from trying to do what they do poorly anyway. Plus my amp no longer needs to send signal to mains saving the amp the strain of those lower frequencies. The SVS sub has a low pass filter which on the phone amp is extremely convenient to use from my sweet spot allowing setting switching from my chair as music plays. I've attempted to adhere to the detailed instructions which are hard to misunderstand. But after considerable experimentation, there is no doubt that the "low pass filter" HINDERS the sound quality profoundly! With this  feature OFF, the music reproduction has filled in a perceived hole in the sound stage. I've switched it OFF and back ON dozens of times and despite various CD's of all kinds the effect is always more natural and full without the "low passs filter." The one glaring downside is that at higher volumes the bass seems too boomy but a simple adjustment to lower the bass volume cures the problem. Maybe someone can benefit from this too!

Assuming your sub is functioning properly, it sounds like your listening position may be in a bass null in your room, which would explain why you can’t hear changes in bass levels because the null will just cancel it out.  I’d highly recommend doing the proven “crawl method” below to find the best spots in your room to place the sub for optimal bass performance at the listening position.  Then once you find the right spot you can use the second link to easily and accurately set the crossover, volume, and phase on the sub (you really need someone help with adjusting the settings unless you can adjust them with software from your listening chair).  Hope this helps, and best of luck  

https://www.audioholics.com/home-theater-connection/crawling-for-bass-subwoofer-placement

https://lifehacker.com/how-to-properly-set-your-subwoofers-volume-without-sh-1506136549

If you are not highpassing your mains every chosen lowpass with make different nulls. You might just be hearing your mains. Run the subs by themselves and see what you think of the different settings. Pull your speaker wires out if needed to run the subs alone.

 

i find even 5hz changes noticeable but i am highpassing too.