Corner loading PA sub test and OMG

Guys,

Yesterday I DJied in a club
That I use to play sometimes

Humble old system below
2 Yorkies LS608's driven by a bridged XLS 2500 and a pair of yammies DSR12's

Although the Yorkies run out of gas before the yammies I balance the system so it sound even.

Anyway ...
I followed the place subs on center of the floor

Yeah normal sound
Coming from the system config.

So it occured to me recalling many reads that says if you face the subs to a corner it will "amplify" the sound ....

I just tested that that I have seen many years ... Never tried , I don't know , is just something that you think will not do much.

OMG!!
It sounded like 4 or even 8 ...cabs
(Never tested multiples next to each other)
So can't tell really but for sure sounded double or triple the volume.

Same cab count ..same single amp
The owner jAW dropped , he thought I bring more stuff and he can't locate the subs as they were not in the center !! Lol

I know that can't be done on some places
But if you can do it..DO it!!!

I will post some pics with some length measurements.
The ceiling is pretty high.

The bass covered the whole dance floor and even another section were another DJ was playing lol.

It was effin incredible....really
How it never occurred to me to actually do it
It was like ....nahh not noticeable or very little gains....nope...totally wrong
It was hugeeee.. improvement !!

And the clients were amazed
They told me ..wow new system sound incredible. Lol!!

Women never have nuff shuz...
Men never have nuff bazz!!
 
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I remember about 20 years ago…one miserable lab horn in the corner and it produced mind blowing bass in a 30x40 dance floor. By the end of the night, however, the bartender in the opposite corner of the room, behind the dance floor was ready to KILL me. She probably couldn’t hear anything below 80 Hz for a week after….. The amplification effect (ie, directivity) works both ways.
 
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I guess it is something about your car's extended warranty... 🤭

But the mental image of looking around nervously, waiting what will crack and fall on your head is a thing you gotta do in your life.

I would recommend the stories of that nature told/written by mr.Danley. when shiz goes down, you better bounce. 😄
 
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I will delay the tops now , I guess between 4 to 10ms will do , I did not have time to align last nite.

But does it really make a difference??,I'm crossing at 125hz, subs to tops, if I align at the dance floors place, does it will make sound more punchier or less mushy, or both ! Lol.

Just saying cause sometimes our OCD creeps in and being that detail oriented did not make a customer in the dance floor to notice.

Unless he is armed with an EMM6 and REW 🤣
 
It is system and frequency dependent. In bad system, tuning delay to taste can push you as far as 30-40ms. Not likely, I am betting on. 8-10ms at 125Hz.

Funnnyly enough, for best outcome, you count the crossover wavelength time, start adding time to a point it sounds most hollow and off, and then reverse polarity (set delay time half wave in opposite) for best result. Then you EQ out the excess that might bother you as the natural room ringing.

Do a frequency sweep in the room, pinpoint the loudest one or two resonances, and then cut it sharply out at -6 to -10dB. It usually leads to better more balanced sound.
 
I knew that you reverse polarity the subs , then play a tone at the XO freq, then move the delay until you get the best cancellation , the point where the signal is the lowest ,that's your best delay time right there, then you flip back polarity to normal and now the XO point sum well.

I need to delay the subs as the subs are around 4 feet forward but also are around 10 feet to the left of the tops , so maybe we get even 🤔
 
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Getting the sub to top delay correct can be night and day difference. Unfortunately, it can’t be right everywhere in the room, especially with a sub in the corner. In that setup I ended up with almost 25 ms of delay - 11 ms in the horn and the rest time of flight difference to the center of the floor. A lot of easier to make it more even with a center (or slightly off center) cluster. You’ll know it’s right when “Money For Nothing” just clicks. The kick and bass sounds like it about to knock you over, even if it’s not turned up that loud (yet).
 
What i think it must be best , will be at the dance floor, the better the sound quality there the better the dancers experience
so i will align in the middle of the dance floor and see.

🙂

Last saturday i did not aligned anything, just tops to sub balance by ear
and i had the XLS2500 in sight cause sometime i clipped the amp and i backed up a little so to not trigger the clip lights
also all nite was correcting a little the bass on the the little board as old songs do not have nuff bass ,... new songs jump with bass

wish there was a device like a dynamic EQ that can output your target curve, regardless of the material
if old or new
 
I guess the best setting would be when you have lowest bass amplitude in the toilets. No wonder these are always shitted and puked all over, because the bass is especially punishing in these small rooms. :-D Dance floor? Nothing! Toilets? Gut wrecking bass. Always!
 
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I remember about 20 years ago…one miserable lab horn in the corner and it produced mind blowing bass in a 30x40 dance floor. By the end of the night, however, the bartender in the opposite corner of the room, behind the dance floor was ready to KILL me. She probably couldn’t hear anything below 80 Hz for a week after….. The amplification effect (ie, directivity) works both ways.

Did you have the Labhorn pointing into the corner, where the corner helped the horn mouth continue? Probably so, I guess.
I had two Labhorns corner stacked that way in a 39x23 ft room.....literally vision blurring 😀

And yep, back wall and especially far corners were deadly. Back wall had built in bookcases for helping dispersion / room acoustics.
I had to get all the shelves sloping upwards into the room, or everything on every one of them would quickly vibrate onto floor.
 
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I guess the best setting would be when you have lowest bass amplitude in the toilets. No wonder these are always shitted and puked all over, because the bass is especially punishing in these small rooms. :-D Dance floor? Nothing! Toilets? Gut wrecking bass. Always!
🤣
with the corner placement yeah you can hear the bass in the bathroom loud and even in the kitchen lol

imagine what 4 FT30's loaded with 18SW115-4 driven with one of these will do
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Even for a basshead like me, corner loading was too much.
I went from corner firing to center firing to flatten out the frequency response.

Even tho' I built the least efficient TH, I was still able to crack walls on multiple floors with a Yamaha HTR-5730 5.1 receiver running in 2 channel mode. The Sony STR-DE915 was running in 2 channel mode too, but it died a couple days after the TH build. Bought it brand new in 1997. The TH was built in 2012.

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