Edogg's Dual LMS AIY (Assemble It Yourself) Build - Page 18

With the large opening you have on the right side of the room it is more than likely a room gain issue down low.

Your subs are insane and I bet sound better than 90% of the sub systems out there that measure flat to 5hz. It's like the hot girl who now thinks she's ugly because she has a small pimple on her thigh, mmmmmm, hot chicks with low self esteem, ohhhhhhh

Hmm, The only room opening I have is to a very small hallway to an exterior door on the back of my theater, yet I still have the same issue. even room gain related, I wouldnt anticipate that big of a premature rolloff either. But like Edogg said, he can still shake everything a good bit even at 7hz

Psssssst.... Speak for yourself MJ. I used to think Eric had a sexy system until I saw that massive 9Hz crater on it's face.

Hey, so am I reading the SMS point paper right? Sub-sonic filter set @ 5Hz for illustration purposes, but can be totally dis-engaged. Meaning no interference from the SMS, or the hardware limitations effect the signal below 5Hz regardless of the filter?

You have a killer system and the F-ing Irene scene as well as others we listened to convinced me of single digit subsonics. There are a lot of variables as to why the omnimic is showing the results it does, after hearing your system I personally wouldn't worry about it though. I do think a DCX2496 or better yet a minidsp will do a better job boosting down low than the SMS-1, they both have there learning curves though.

Watch out for popalock, he is trying to make a move on your system by telling it it's ugly and fat, I am sure he is telling it right now he can make it feel better though

Whatever the cause/issue may be - I'm willing to bet pretty much NOBODY on here could reliably differentiate between flat to ~10hz vs. flat to ~7hz. At this point we're just talking numbers on paper for bragging rights.

Austin, you are correct. The electronics limitation would be what would end up hindering you on the sms-1, but even then, thecurve rolling off the least on that graph, is still what you would get with everything defeated.

Eh, cept, now I am only flat to close 13hz or so. On paper. I just want flat to 10hz on my graph, and I will STFU

Just for you - maybe we will do some 'blind' testing this weekend at the GTG. We will play a scene containing known ultra low stuff both with and without a 15hz HPF.

In no uncertain terms a 15hz HPF will significantly diminish the impact of the bass. Ignoring the music I made that intentionally contains those freqs, I've got a number of songs from different artists that will also take a hit from a HPF at 15hz. I'm really psyched to hear a few track I know are going to be unreal.

Perhaps at listening position/height those frequencies appear diminished in loudness, but that doesn't mean objects (like a wooden floor, a couch, ..) cannot be affected by them more strongly, as they're at different positions in the room than your LP.. Sorry if that doesn't make much sense, English is not my native language.

+1

eric, you can pick up the dcx anytime. i need a favor to ask you if i can borrow the omnimic for a few hours to measure my sub.

Hey man, how does the system sound and feel? I can say if you are happy with the overall "feel" and headroom, crank it!! Wish I was there to enjoy the ride.

is there any video or pictures of the GTG you are referring to?

When you have the LMS's at full tilt, do the surrounds dimple at excursion. I saw Ricci's LMS at pretty much full excursion and it really swings. It is hard to believe how much they push. I do not seem to push mine as hard. I am afraid to get to those levels, I guess.

Thanks,

Robert

Same here.


What kind of listening position spl do you get during movies. Is it enough to blow you away for a while or are you looking for more?

Sounds wicked. Do you get the kick in the chest bass when watching dvd's of rock concerts or are they crossed very low?

cool. I have mine crossed at 50. I just do not like anything higher, but I have been of the mindset lately to let them do up to 120 on the .1 channel when I get my entire system finished.

Keep cranking,

Robert

Here is my room with my dual Submersives. Currently they are stacked and corner loaded, I like the headroom it gives me at the main LP, I figure the freq response at the other seats be damned since no one cares but me how the bass sounds in my room anyway.

As you can see, mine drop off almost exactly like your guys' do. However, the 7hz note in Bass I love you is ok, but not as impressive as edogg describes it in his room so I have my doubts that I'm really digging as deep as you guys are.





Does the Submersive have some kind of HPF or limiter when you get down close to single digits?

Obviously I have more work to do, but I just bought the Omnimic and played with it and my SMS-1 for a couple hours last week.

The SubMersive appears to have a 7hz filter:


I know there was atleast one case where Auydessy was over boosting the ULF by a good margin and causing the amp to go into protection mode so maybe this is why he chose to use it. When Auydessy was off, there was no issues with the amp.