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"OMFG, Krypto is getting a mic finally!" - Page 2

post #31 of 464
Jordan,

What you need is 5 off these!

I think they should just about do the job.

http://www.seaton-sound-forum.com/post?id=3044980

Oh or 5 off these.

http://jtrspeakers.com/home-audio/triple-12ht/

But you would have to buy the amps.
post #32 of 464
Thread Starter 
Quote:
Originally Posted by Starkiller4299 View Post
115dB to start!
Funny I was just coming to ask... what is reference, 75dB? 85dB? I don't even know! Do you basically want to be able to do reference as flat as possible, within 3dB, as high and low as possible? Everything on top of that is icing on the cake? I'm going to guess my little cubes aren't going to come close, 10dB short? If this is the case, can I basically make it all as flat as possible -10dB from reference, but then make 20Hz on down reference (10dB hotter than the rest, but at reference) or even more if I can, say 20dB hotter thatn the rest, 10dB above reference?
post #33 of 464
Thread Starter 
Quote:
Originally Posted by gperkins1973 View Post
Jordan,

What you need is 5 off these!

I think they should just about do the job.

http://www.seaton-sound-forum.com/post?id=3044980

Oh or 5 off these.

http://jtrspeakers.com/home-audio/triple-12ht/

But you would have to buy the amps.
that second link, the center sub, no dustcap, looks like you see the coil? Or is that a flared port?
post #34 of 464
From my understanding speakers 105db and sub 115db but for your subs you will want speakers to run atleast 115db. Otherwise you probably would only have needed two single IB3 driver subs.
post #35 of 464
Quote:
Originally Posted by kryptonitewhite View Post
that second link, the center sub, no dustcap, looks like you see the coil? Or is that a flared port?
The JTR Triple 12 is equipped with two 12 woofers in a vented enclosure, combined with a sealed 12 midrange coaxial fitted with a 1 compression driver.
post #36 of 464
Yah, once you dump the towers...woops, did I say that out loud? Heheh. You should build some Econowaves or stock 4pi's. Those little cubes... heh, won't get you far.
post #37 of 464
Thread Starter 
but I keep sayin I am pleased with the cubes... I listen at a very low volume. I think Ill run a full range sweep, settings as they are, 1st thing to do a before/after thing. If I find out that I am 85dB average when i listen "loud" ( master volume -15dB to -20dB) and 75dB "normal" ( -25dB) where I keep it most of the time, and "nite time everyone else is sleepin" (lower than -25dB, duh) 60dB.... can't I leave it there, even if the little cubes are capable of 166dB?

The cubes are louder than I need, BUT I would LOVE to run TMWWT's with two High Xmax 7"ers ( RE XXX component woofers, RE Audio mids that were just like the Adire, Adire Audio Extremis, SDX7s, Mpyer mid woofs, AA poly mids, AA carbon mids... Anarchys........) one CSS FR125S, and two Super dooper tweets...


But I could be more than happy with a CSS FR125SR vented and a super tweet quasi-crossed over just to brighten up the top end and add a tiny touch of midbass.

Fellas, it's one thing to want everything, and another to say I'd settle for this, but what I have now will do... so let me say if i ever upgrade the mains, I'll get 7 channels of this:

http://creativesound.ca/details.php?...125SRPLUSERT26

And call it a day. Prolly never will, prolly stick with my little cubes.
post #38 of 464
Quote:
Originally Posted by gperkins1973 View Post
Jordan,

What you need is 5 off these!

I think they should just about do the job.

http://www.seaton-sound-forum.com/post?id=3044980

Oh or 5 off these.

http://jtrspeakers.com/home-audio/triple-12ht/

But you would have to buy the amps.
I looked at those first. Way overpriced for the performance. The JBL Pro cinema gear kicks their ass around for WAY less money.
post #39 of 464
Have you got some JBL model no's to hand to get and idea on comparison to the seatons and jtr's
post #40 of 464
Quote:
Originally Posted by gperkins1973 View Post
Have you got some JBL model no's to hand to get and idea on comparison to the seatons and jtr's
3677 ($500), 4722n ($1000), 3722n ($?? slightly lower model from 4) bunches of others. Their top of the line new model surround speakers (8350) are only like $345 or so a pop.

http://www.jblpro.com/products/cinema/index.html

The JTR with lower sensitivity, coaxial rubbish with 1" cd, etc are like $1500 each. Not even going to get into the seatons since the have built in amps and that just isn't necessary with speakers like these and any modern receiver.

The 3677 with one 15 and a smaller horn measures at 99db sensitivity, the 4722 measures at 104db. Those specs are also in full space.
post #41 of 464
WOW! I can't believe the 8350's with the specs they have are only $350 a pop. That's like £200 for a speaker which out specs most £1000 speakers over here in the UK. And they only weigh 9kg.

The 3000 series look like great specs too all be it very very ugly. It would be pretty hard getting those past the missus.

Very impressive though.
post #42 of 464
Quote:
Originally Posted by gperkins1973 View Post
WOW! I can't believe the 8350's with the specs they have are only $350 a pop. That's like £200 for a speaker which out specs most £1000 speakers over here in the UK. And they only weigh 9kg.

The 3000 series look like great specs too all be it very very ugly. It would be pretty hard getting those past the missus.

Very impressive though.
That's the only problem. Not pretty.

The 8350s are designed to be augmented with a subwoofer, since they roll off around 80hz. However, 97db sensitivity in full space for a 10" and a horn in such a light package is excellent. They sound amazing. Since they're wall mounted, JBL listed them as 99db in half space as well. Great speakers.

The pro cinema gear is indeed ugly, but it's pro gear. The consumer models of the same stuff costs a lot more, but isn't as ugly. You can always make a grill or something for a lot of those, but there isn't much you can do to hide the large horns These were designed to go behind a screen. Personally, I like the look. My wall of speakers rocks haha.
post #43 of 464
Do you know if they can be sourced in europe or are they just in the states.
post #44 of 464
Quote:
Originally Posted by gperkins1973 View Post
Do you know if they can be sourced in europe or are they just in the states.
Not sure, they have Europe/Russia listed as a region on jblpro.com. You should send them an email asking for a list of authorized dealers.
post #45 of 464
Will do. It would be interesting to see how much better they would be than my monitor Audio RS6 floorstanders. I am only using a onkyo 876 which is chucking out 140 watts per channel (so onkyo say which is probably very unlikely). Being a high sensitivity I guess you could still run them with that kind off power, until I could afford to buy seperate amps.
post #46 of 464
140 wpc will hurt you with those jbls =] 128 watts to a 4722N will output 125db in FULL space.
post #47 of 464
Thread Starter 
Quote:
Originally Posted by notnyt View Post

140 wpc will hurt you with those jbls =] 128 watts to a 4722N will output 125db in FULL space.

how much in-room gain can you get with mains
post #48 of 464
Not a ton but it depends how you use them. There is gain from being near boundaries. Most pro style speakers are rated for 2pi space (half space) which is equivalent to being in an open field. Then there is quarter space which means there is two boundaries nearby (like a floor and a wall) and you get gains for this. Then after that is eighth space which is in a corner. You get even more gain here, upwards of +9dB. Of what the bandwidth is for such gains, I can not explain myself but this why it is almost universal to plop a subwoofer in a corner. You'll see damn near every single brand name subwoofer list this as a 'to do' in their instructions.

Anyway, I believe these gains are mostly in the bass region (250hz and down). These are simply gains from being near the floor and walls inside a room/building. You will get such gains in any kind of building as long as the speaker is near a boundary.

This is different from pressure vessel gain (room gain).
post #49 of 464
Thread Starter 
Glad I asked, now I know there is pressure vessel (room) vs boundary. Cabin gain in a car, is that simply room gain...pressure gain, or a combination... loading off the entire cabin?
Is it all 12dB/oct or something like that?
post #50 of 464
It is theoretical in home to be 12dB/oct but it really depends on the construction of the building. The more realistic scale is about 6-9dB/oct.
post #51 of 464
i just posted on this:

remember winisd models 2 pi space. in a real room, like scott is talking about, you get pressure vessel gain. this kicks in typically around 25hz +/- and provide a theoretical 12db per octave of free boost (but in reality, because of lossy room walls, air leaks, etc., the boost is 6-9db per octave).

the frequency where it starts to kick in is ~= 565 / Sqrt(L^2 + W^2 + H ^2)

numbers in feet.

...

what is actually going on at that point is that the long dimension of the room is less than one half of a wavelength. as a result instead of the sound wave bouncing and reflecting around the room, the pressure in the room just goes up everywhere. the speed of sound is ~1130 feet per second. 1/2 that is 565. that is where the 565 is coming from.

...

this is why cars have so much higher spl than homes, the long dimension is typically only a few feet, so the 12db/octave boost kicks in much, much higher. the smaller the cabin and the more rigid the walls the better for boost.
post #52 of 464
Thanks for explaining that in English and in a way a thick headed monkey like myself can understand!
Now I have a list of about 125 things that maybe you could also explain to me.

Quote:
Originally Posted by Scott Simonian View Post

Not a ton but it depends how you use them. There is gain from being near boundaries. Most pro style speakers are rated for 2pi space (half space) which is equivalent to being in an open field. Then there is quarter space which means there is two boundaries nearby (like a floor and a wall) and you get gains for this. Then after that is eighth space which is in a corner. You get even more gain here, upwards of +9dB. Of what the bandwidth is for such gains, I can not explain myself but this why it is almost universal to plop a subwoofer in a corner. You'll see damn near every single brand name subwoofer list this as a 'to do' in their instructions.

Anyway, I believe these gains are mostly in the bass region (250hz and down). These are simply gains from being near the floor and walls inside a room/building. You will get such gains in any kind of building as long as the speaker is near a boundary.

This is different from pressure vessel gain (room gain).
post #53 of 464
Jordan,

I can't wait to see what kind of numbers you are getting.
This will be an awesome project. I bet plenty of people here have been wondering what kind of numbers you have been putting up since the first day you built those awesome monsters.
I know for one I sure have been wanting to know.

Good luck on this adventure.
post #54 of 464
Hell yeah. Im curious as hell.

You may even prove us all wrong, J. Uh huh.
post #55 of 464
Thread Starter 
well thanks for the encouragement guys, I need it. I'm not out to prove anyone wrong. If something neat comes out of it, say ported IB/SLLTs make it big for a couple of weeks and people that have the room to spare give it a shot, I would wet myself where I stand... but even if we make a pretty good LFE system out of this, 4 18's good not four cheap 18's good, I'll be more than content

I'll need your help the whole way though!
post #56 of 464
Actually, I have had an idea that I have been working with for quite a while based on your giant enclosures, though I was hoping for a few measurements to be sure.
post #57 of 464
Quote:


140 wpc will hurt you with those jbls =] 128 watts to a 4722N will output 125db in FULL space.

So even if the amp is actually running 100 watts that should still give me quite a bit off spl. That's defo food for thought.

What do they sound like with music?
post #58 of 464
Quote:
Originally Posted by gperkins1973 View Post

So even if the amp is actually running 100 watts that should still give me quite a bit off spl. That's defo food for thought.

What do they sound like with music?

superb.
post #59 of 464
Thread Starter 
Quote:
Originally Posted by 3AMRecords View Post

Actually, I have had an idea that I have been working with for quite a while based on your giant enclosures, though I was hoping for a few measurements to be sure.

I just pee'd a little! YEEEEEEEE-AH!
post #60 of 464
Quote:


superb.

That's great to know. Let's see what JBL say about sourcing them.
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