I want a subwoofer flat from 10hz-40hz

[Audiophilenoob]

I do love those high performance pro drivers.

I got 6* 18" pro woofers in my system (2 on center, 2 on each mains). But what I like is the effortless they perform, not the vast SPL.

I took my millitary service in an airforce base. Those jet engine tests were really killing me. And those engines are "smallish ones" used on F5E, which is the smallest jetfighter's engine I've known. Even so, their sounds were more than enough to kill me, twice. I can't imagine the later bigger engines on F16 & Mirage2000.

In a normal & quiet environment, I doubt anyone would actully "need" an average SPL more than 100dB.

How do you like baby's crying? Quite annoying huh? That's slightly less then 100dB, around 94~96dB. It's really "more than enough".

If not, maybe the hearing needs check. And, the neighbors probably have already moved out? Or they might be wrapped in their cocoons which they "evolve" to be?

my system reaches reference levels of 116+ db from 40hz-15khz

and the SQ is unbeatable by any speakers period at moderate volumes 105db+

 

[Audiophilenoob]

I'm liking 4 AV15's in 20-25 cubes... I think I can accomplish it if I can find passive radiators

ported down and downfiring of course

 

[justinc]

ok just ran the av15, 8 of them in 40cuft total with 4000 watts is about 123db max -12 @10hz -3 @20hz without room gain.once u figure in room gain thats flat to 10hz or below and u can eq the peaks down to get perfectly flat. however i think i would go wiht 8 of them in 20cuft total with 3000 watts u still get 119db which is more than enough, and u have much much smaller boxes.

 

[bossobass]

Close to 120 dB to 10 Hz, in-room, 13ish feet away. This is, of course, a quick sweep, testing for power compression. I don't know if the Tummies can take this sort of abuse longer term.

What actually caused the power compression in these tests was the amps clipping. During short burst testing, the amp is always the first to go with an L/T (when the drivers are the caliber of Tumult, and the box is sized correctly to limit excursion to allow for some headroom there).

Yes, lower Fs matters in this scenario.

You can apply approx. 2,400 watts per dedicated 20 amp home run. Any larger ampage will not receive enough current to make much difference, so do your modeling thusly. 😎

If you double this (2-2X15", sealed, L/T'd, Tumults, each driven by 2,400 watts, each amp supplied by a 20 amp dedicated home run), you'll have your wish, but...don't expect much in the way of software that delivers this sort of thunderous unleashing of destructive holy hell.

BTW, that is my current low freqs setup, double the graph, or add 6 dB for stacking. And, 4.5 cubes each is tiny relative to the capability of the system, in-room.

Bosso

 

[Audiophilenoob]

ok just ran the av15, 8 of them in 40cuft total with 4000 watts is about 123db max -12 @10hz -3 @20hz without room gain.once u figure in room gain thats flat to 10hz or below and u can eq the peaks down to get perfectly flat. however i think i would go wiht 8 of them in 20cuft total with 3000 watts u still get 119db which is more than enough, and u have much much smaller boxes.

8 av15's??????

room gain is pretty signifcant if I can figure out a corner load

but with 8 speakers I would ahve to do a center channel here

 

[Audiophilenoob]

Close to 120 dB to 10 Hz, in-room, 13ish feet away. This is, of course, a quick sweep, testing for power compression. I don't know if the Tummies can take this sort of abuse longer term.

What actually caused the power compression in these tests was the amps clipping. During short burst testing, the amp is always the first to go with an L/T (when the drivers are the caliber of Tumult, and the box is sized correctly to limit excursion to allow for some headroom there).

Yes, lower Fs matters in this scenario.

You can apply approx. 2,400 watts per dedicated 20 amp home run. Any larger ampage will not receive enough current to make much difference, so do your modeling thusly. 😎

Bosso

simply beautiful!!!

is the av15 a good canidate for this design!

my room is roughly half that size also

and my listening position is roughly 6 feet away

should increase at least 6db given this from your graph correct?

 

[justinc]

actually you could do what i stated above with 4 av15s in the same size box with 2000 watts but you will be at max excursion. with 8 of them you would only be using 10mm of their excursion so it woudl be much cleaner bass

 

[Audiophilenoob]

actually you could do what i stated above with 4 av15s in the same size box with 2000 watts but you will be at max excursion. with 8 of them you would only be using 10mm of their excursion so it woudl be much cleaner bass

maybe his idea with 2 15" tumults is better

if I can find them used and such

 

[justinc]

the new tumults will be out soon however at 750 each thats pretty expensive. almost 2x the excursion of the av15 though.

 

[simon5]

OK, since you put a restriction on the size of the box...

15 cu.ft with 4 Titanic MKIII woofers in two isobaric pairs with 2000W imput. 122 dB at 10 Hz and 126 dB at 40 Hz with room gain included.

I got your 120+ dB but I can't get your 3 dB rolloff.

 

[Audiophilenoob]

the new tumults will be out soon however at 750 each thats pretty expensive. almost 2x the excursion of the av15 though.

no way I would pay that for those speakers... if I have to I will get TC sounds to make me a pair of 15's to my specs or wait for their monster one as I need to save up the $600 anyway 🙂

 

[Audiophilenoob]

OK, since you put a restriction on the size of the box...

15 cu.ft with 4 Titanic MKIII woofers in two isobaric pairs with 2000W imput. 122 dB at 10 Hz and 126 dB at 40 Hz with room gain included.

I got your 120+ dB but I can't get your 3 dB rolloff.

lol what program are you using???

sounds too good to be true

I can go up to 30 cubes if it's WORTH IT!

3db rolloff doesn't matter too much...is this corner loaded BTW?

two seperate boxes can be made...

I'm pretty interested in this AV15... since you've already modeled it it seems to be better than the MKIII for this purpose and it's the same price point

 

[simon5]

Using WinISD Pro. Yes, corner loaded of course.

30 cu.ft? You're serious? That's huge you know hehe!

Found another option using a single pair of Ascendant Audio Avalanche 18 in a isobaric pair driven by 1600W.
15 cu.ft enclosure, 121 dB at 10 Hz and 124 dB at 40 Hz.

No the MKIII model better down to 10 Hz, the AV15 is slightly peaking around that frequency because the Fs is higher.

 

[Audiophilenoob]

Using WinISD Pro. Yes, corner loaded of course.

30 cu.ft? You're serious? That's huge you know hehe!

Found another option using a single pair of Ascendant Audio Avalanche 18 in a isobaric pair driven by 1600W.
15 cu.ft enclosure, 121 dB at 10 Hz and 124 dB at 40 Hz.

No the MKIII model better down to 10 Hz, the AV15 is slightly peaking around that frequency because the Fs is higher.

my midbass cabinets are 10 cubes each!

20 cubes is acceptable...I can LIVE with 30... but would prefer less

I Can't get a pair of ascendants...

I'm not certain I can corner load with so many speakers either

what's the tune of the box that you're getting these levels with?

 

[simon5]

The enclosure with the Titanic is tuned at 10.5 Hz.

Same thing for the Avalanche.

If you can't put these subwoofers corner loaded, will they at least be against a wall?

 

[Madmike2]

You guys are INSANE ! ! 🙄 😀

Send in photo's of the cracked and dropping plaster. Your wifes' back as she is leaving. The dead cat. Your neighbour shotgun in hand.

10 Hz at 120 db, certifiable all of you

 

[Kravchenko_Audio]

One more reality check!

Hey Noob have you any windows in this room? Better keep them open if you are going to try this. And what is the building constructed of? A wood building will go into resonance modes that will be very disconcerting. Maybe you will even find it's true resonace and you will have cracked drywall and such. The kind of SPL that you are trying to produce is just a bit on the wild side.

As for power the amp it may be able to do it. I'd bet that you are on a shared 15 amp circuit that can deliver only ( 15 * 117 = 1755watts less amp losses of say class B @ 72% = 1755 * .72 = 1263 watts being very generous on the efficiency by the way ) Not as much as you would like. And that is absolutely ideal. The electrical code in Canada allows up to 12 fixtures per circuit. That's made up of lights or plugs. I'm pretty sure that it is the same in the U.S.

The other reallity check is that you will not hear this in all or even most places due to room modal points. Dead spots.

to make it a real project you need a DIY annexed concrete bunker about 32' x 14 1/2' x 12' that will rock. But it will be a little hard to get past the landlord or the parents or......... 😀 😀 😀 😀 😀 😀 😀 😀 😀

Mark

 

[justinc]

any particular reasons you suggested those dimensions? or anything larger than that will work?

 

[Audiophilenoob]

Re: One more reality check!

The enclosure with the Titanic is tuned at 10.5 Hz.

Same thing for the Avalanche.

If you can't put these subwoofers corner loaded, will they at least be against a wall?

yes... the will be against the smallest wall.... I'm doing the 4 isodbarik MKIII's btw....

 

[Audiophilenoob]

Re: One more reality check!

Hey Noob have you any windows in this room? Better keep them open if you are going to try this. And what is the building constructed of? A wood building will go into resonance modes that will be very disconcerting. Maybe you will even find it's true resonace and you will have cracked drywall and such. The kind of SPL that you are trying to produce is just a bit on the wild side.

As for power the amp it may be able to do it. I'd bet that you are on a shared 15 amp circuit that can deliver only ( 15 * 117 = 1755watts less amp losses of say class B @ 72% = 1755 * .72 = 1263 watts being very generous on the efficiency by the way ) Not as much as you would like. And that is absolutely ideal. The electrical code in Canada allows up to 12 fixtures per circuit. That's made up of lights or plugs. I'm pretty sure that it is the same in the U.S.

The other reallity check is that you will not hear this in all or even most places due to room modal points. Dead spots.

to make it a real project you need a DIY annexed concrete bunker about 32' x 14 1/2' x 12' that will rock. But it will be a little hard to get past the landlord or the parents or......... 😀 😀 😀 😀 😀 😀 😀 😀 😀

Mark

actually IIRC each room is a seperate 25amp circuit.... the amp is class H or w/e BTW and is 75+% efficent

the room is steel with sheetrock... no plaster or drywall

muhahhahhahah

I will take some pics when it's finished

I've seen this amp give more than 1500 watts RMS in this room... measured