136 replies to this topic

[DaBaSSy1]

Antony, on Aug 28 2007, 03:19 AM, said:

How about 2 Cerwin-Vega Stroker Pro 15's running off 2 strapped Audison VRX1.500's (thats 4000 watts at 2 Ohm). I'll let you know how 20Hz sound when I finally fire them up.
Ant

Ouch

[SCorpion]

Antony, on Aug 28 2007, 01:19 PM, said:

How about 2 Cerwin-Vega Stroker Pro 15's running off 2 strapped Audison VRX1.500's (thats 4000 watts at 2 Ohm). I'll let you know how 20Hz sound when I finally fire them up.



Ant

my reference is a 10" sub off 350wrms and down -3db @ 13Hz



but it only plays up to 25Hz aswell

[1point21gigawatts]

SCorpion, on Aug 28 2007, 02:46 PM, said:

my reference is a 10" sub off 350wrms and down -3db @ 13Hz



but it only plays up to 25Hz aswell

Damn thats impressive, what is it? What is an SGR? they must be expensive if you are not considering them, otherwise it could be a nice little add on to the idamx to help your system play lower.

Edited by 1point21gigawatts, 28 August 2007 - 03:30 PM.

[~thematt~]

You talking about a Direct Drive unit Scopion? Like the Velodyne?

Because they can REALLY go low.

[SCorpion]

~thematt~, on Aug 28 2007, 03:16 PM, said:

You talking about a Direct Drive unit Scopion? Like the Velodyne?

Because they can REALLY go low.

very similar design as the XXX, JL and all the others.



but i cant afford them.

[muzzy66]

One interesting thing to consider... it may be worth firing up a CD with some test tones on it.

I wacked one into my car myself and found that pretty much regardless of how loud I turned it, I was unable to actually hear anything below about 25hz.

That said, if I enabled a 25hz (or eve 20hz) HPF on the sub I did notice the change so there is no doubt that it's percievable, just not audiable to my ears.

May be worth considering this

Luke352, on Aug 25 2007, 02:06 PM, said:

Pulse R has made some very good points, what most people think is 20hz is probably closer to 40hz, and if you really want to play down to 20hz with any kind of presence (volume isn't the word because 20hz is basically getting into the inaudible range) you need to be able to move SERIOUS amounts of air, 1x12" really aint gonna cut it for real 20hz output, two 15's is where you really want to be looking or 3 or more 12's.

I wouldn't say that, depends on how much output you are after at 20hz. If you wan't -3dB @ 20hz then that is quite achievable with a number of subs. Bassbox indicates -3dB incar with my Vanadium in 34L (a little bigger then recommended) and it's a great sounding sub (and for sale at the moment!).

The new aluminium cone Peerless XXLS 12" indicates 21.5hz @ 0dB in it's optimal 44L sealed enclosure as well which is extremely low. -3dB is at an indicated 17hz. That said, it also indicates a 4dB peak at 37hz in this sized enclosure, so that could pose a potential problem in terms of linearity.

The XXLS 10" indicates -3dB @ 25hz in it's optimal 17.5L, but this is likely not deep enough for your tastes, for what you suggest - it does however have an amazingly flat response with the response curve indicating +/-2dB from 50hz - 800hz in free air, and bassbox indicating impressive linearity in-car also.

IDMAX shows an indicated -3dB @ 25hz also, in it's optimal 28L sealed - so you are looking at similar depth to the 10" XXLS.

If you are after 0dB @ 20hz, then you are pretty limited. TheMatt mentioned TC sounds, which is a defiante option if you can get the enclosure right. My brother uses an Eclipse model that is based on the TC sounds design (build by TC sounds, if memory serves me correcly). I belive they are around the $500rrp mark, and these things are one of the deepest playing 12" subs on the planet. These subs have over 30mm of one way, linear excursion so which probably helps to bring about the rediculous depth .. something along the lines of -3dB @ 16hz without cabin gain in 34L sealed.

Note on these though - they must be used in sealed enclosures. Eclipse actually declare in their manual that your warranty is void if the woofers are used in a ported enclosure. The other problem? They have rediculously low sensitivity (something around 83 or 84dB for the 12") which means you need an absolutely truckload of power to get them to move. My brother is running his bridged off 600w rms and had to get the gains up to about half way before the sub was even audiable. I'd say don't bother with this sub unless you have some serious power available. They are also single voice coil (LVC technology) which makes wiring up a pair of them pretty easy (8ohm or 2ohm load). In terms of SQ, they are abosolutely brililant, and are one of the lowest distortion subs out there - apparently one of the only subs with lower distortion levels then the previous generation XXLS subs (the new aluminium ones are a different design).

Phew... that leaves me about out of breath, hope that helped

Edited by muzzy66, 28 August 2007 - 05:41 PM.

[heimerich]

I've tested the previous model RE XXX, it is an extremely low bass however I reckon Adire Brahma do a better job than RE XXX... Adire Brahma has a better control on low frequency than RE XXX... I've compare XXX, IDMAX, Brahma, SSX, Matrix Elite and W7 in the same system and in the same car... the amplifier used is Abyss CT2000... I vote for Brahma... the only problem with all those subwoofers, they can't keep up well with the midbass that I use...

When i test Skanning Audio Technology Flex Series subwoofer, Brahma is blown... Freq response 18Hz - 800Hz... Fs 15Hz... I was overwhelmed with this driver... the only problem is 3.5cuft ported box... you can't really listen to freq below 25Hz... you just feel the vibration...

Edited by heimerich, 28 August 2007 - 06:24 PM.

[SCorpion]

heimerich, on Aug 28 2007, 06:19 PM, said:

I've tested the previous model RE XXX, it is an extremely low bass however I reckon Adire Brahma do a better job than RE XXX... Adire Brahma has a better control on low frequency than RE XXX... I've compare XXX, IDMAX, Brahma, SSX, Matrix Elite and W7 in the same system and in the same car... the amplifier used is Abyss CT2000... I vote for Brahma... the only problem with all those subwoofers, they can't keep up well with the midbass that I use...

When i test Skanning Audio Technology Flex Series subwoofer, Brahma is blown... Freq response 18Hz - 800Hz... Fs 15Hz... I was overwhelmed with this driver... the only problem is 3.5cuft ported box... you can't really listen to freq below 25Hz... you just feel the vibration...

i have seriously considered the brahma, but i need to find one to listen to AND find one under 1k



the TC sounds subs sound like a winner, but ill need to hear it first



the hammer has plenty of balls to push just about any sub anyway, so it *shouldn't* be a problem



soooooooooooooooo, anyone here own a TC sounds sub?

OR, maybe run a pair of 10" XXLS subs? they can be had for $300-$400 i think someone in this thread has said

Edited by SCorpion, 28 August 2007 - 06:47 PM.

[Luke352]

Aranmar Acioustics has two Adire Brahma's left I belileve on sale for about $600 each or cheaper for both.

[SCorpion]

Luke352, on Aug 28 2007, 06:57 PM, said:

Aranmar Acioustics has two Adire Brahma's left I belileve on sale for about $600 each or cheaper for both.

really? i thought adire had shut nup shop?

[808]

I believe they have closed but his website says he has 2 left they are 10s though,$850rrp less 30% so like luke said about $600 check em out

Edited by 808, 28 August 2007 - 07:12 PM.

[20Hurtz]

all his price are gst and freight exclusive though and good luck getting recone if they ever need it

Edited by 20Hurtz, 28 August 2007 - 07:37 PM.

[SCorpion]

20Hurtz, on Aug 28 2007, 07:36 PM, said:

all his price are gst and freight exclusive though and good luck getting recone if they ever need it

he's a good bloke, and im pretty sure he could recone it himself if need be.

[Gonadman2]

SCorpion, on Aug 28 2007, 08:02 PM, said:

really? i thought adire had shut nup shop?

Aranmar are still going, its Adire Audio that have shut up shop. I have an email at work that details what happened and what they will be doing with the business - I will add it tomorrow.



They have spoken with Dan (the guru/designer of XBL2) about continuing to supply Tumults/Brahmas, but its just talks as I understand it.



Speaking of these things, the Adire Audio Tumult/Brahma will play that low - the design is quite similar to the RE XXX woofer's I believe...

[Luke352]

You just had your 12" reconed didnt you Gonadman .

Two 10" Brahma should perform nicely for a strong low end.

Edited by Luke352, 28 August 2007 - 07:42 PM.