Axiom Home Page Forums General Discussion Stereo Out with the new and in with the newer

Cork, I know your joking (Maxwell Man)

But as insane as all those subs are ... if placed correctly and levels set such that when combined they blend with the LFRs the results would be smoother base thought the room rather than overwhelm it. But you knew that ...

As far as Mojo's "innards" go ... think he's attempting to create a new sonic weapon ... just needs some sort of lens to focus that energy. Actually, there's a TED talk about just that sort of thing ...

Rich (I see now we have two of you), I will never again share my secrets with you.

Trevor, thanks for posting that link. I wish I had a rectangular room.

I've tried four corners and mids although one corner wasn't really a corner and two of the mids were displaced from the wall boundaries. Both resulted in very flat bass at my MLP and well away. I found though I lost a lot below 25Hz. This is all by ear and with subs fed from the Onk's sub out.

The towers of power I posted started off as a joke to maximize the sound pressure at my MLP. Each tower is fed from each LFR DSP. While the sound pressure was a thing to behold, it wasn't flat at my MLP. I engaged the 800 in the back fed from the Onk's sub out. With a combination of tweaked crossovers, gains and phases, I've achieved deep, loud and flat enough bass at my MLP. It's hard to explain but I hear articulation in the bass that was hinted at with a single sub. I started noticing that articulation more as I added subs. This topology has amped that articulation up.

The problem is, there's a threshold volume which over-excites the room below 25Hz and that creates a reverberation because the room is under-damped. This isn't as much a problem with music as with movies. I can now listen to music at a very low volume and feel and hear every growl and groan in the bass. When I say low volume, it's at -30 and recall I'm sitting 14 feet away (15 usually because I lean back). This is a very comfortable level for me and with the active LFRs, I still get envelopment and a wide and deep stage. Very, very satisfying.

My buddy who stole my M100s and set up twin subs with them was over last night. He was completely floored when he listened to tunes he was familiar with. He had no idea how much bass articulation is missing in his system. One can listen to his system and be very satisfied but listening to the same stuff at my place is a different thing altogether. Of course it's not just the bass but also the clarity and spatial presentation.

I want everyone to know I was very happy with a single 800v4. All this is nothing more than an attempt to satisfy my curiosity.

If you treat an L shaped rooms like 2 adjoining rooms you can set up subs in a way that will do the same thing as they model in a rectangular room. Nearfield subs will load that area so long as you oppose them. They use this same strategy in outdoor concerts with no walls at all. Worth a try. I've done it before. Works well.

More economical perhaps. Totally guessing on your dimensions based on pics over time.

You can build a false panel to mirror the fireplace. Other acoustical benefits there too by deleting the corners. Then your right and left channels are each boundary loaded identically too.

ie.

Page 13 outlines what i was referring to in another thread re: adding more speakers to a room. The more coverage (in the extreme) the more reality it is. In this case, adding 5000 subwoofers smooths the room modes to the point of flatness hence accuracy less influenced by speaker location within a room.

Love that Harmon research. Really cool stuff.

Thanks for the analysis, Trevor. I can't mirror the fireplace because the stairs going up are on the right where you've placed the false corner. To equally load the room and get a proper soundstage and imaging, I've had to place the LFRs at unequal distances from the side walls. I've had to do that with every speaker actually. The actives are amazing because they acoustically disappear with anything thrown at them.

The experiments with the subs continue until my back or something else like nads or sphincter gives out.

After sleeping on this I think I have some clarity...
If you can shake your house hard enough and at the right frequency there might be a good chance at bring it down. Then you can rebuild it for sonic perfection. I’d bet your policy has no exclusion for sonic implosion. Simply brilliant!!

By chance did you happen to increase your home owners coverage recently?

Why yes, I did! I even took lots of videos.

I'll bet there's a specific frequency that matches the resonant frequency of the house and with 1 milliWatt, the whole mess will shake apart into dust.

BTW I'll be moving in 5 years and the new place won't have a cursed A/V room. By then though I may be crapping my drawers and babbling (more) incoherently so A/V may be the last thing I need.

Smart subs get bored after sitting in one place for a while and start wondering if there might be a better location.

If you want them to sit their butts down in mutually agreed upon locations you need moderately intelligent but well trained subs