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Ocuriel 
Copper - Posts: 141
Copper spacespace
Joined: December 01, 2004
Location: United States
Posted: May 13, 2005 at 5:20 PM / IP Logged  
Another sub to consider is a soundsplinter rl-p sub. I've never heard one play, but only hear positive things about these subs. very good sound quality, get pretty loud & are very reasonably priced. check them out at sound www.splinter.com. they are part of tc sounds which i hear is another reputable high end audio company.
Steven Kephart 
Platinum - Posts: 1,737
Platinum spaceThis member has been recognized as an authority in Mobile Audio and Video. Click here for more info.spaceThis member consistently provides reliable informationspace
Joined: November 06, 2003
Location: Oregon, United States
Posted: May 13, 2005 at 5:26 PM / IP Logged  

Notice on the graph above the shallower roll-off of the Braha's low end.  Now increase the power on the Brahma to about 1200-1500 watts and see what happens.  Keep in mind that the linear excursion limits on the Brahma are up over 2" peak to peak. 

Also try graphing each sub in the same alignment instead of the same size enclosure. 

Is that the old Brahma, or new Brahma you are graphing?  One thing to be aware of is that WinISD is assuming that the parameters don't change with excursion.  In reality each subwoofer will be effected by BL compression, the Brahma quite a bit less so due to the XBL^2 motor.  Sure a sub might have a better 1 watt sensitivity, but that will quickly be reduced with excursion.  The Brahma will have the same efficiency throughout most of it's excursion due to the flat BL curve.  This has thrown people off in the past when they were expecting a lower efficency out of one of our speakers compared to another due to the lower rating.

Steven Kephart

Adire Audio

kfr01 
Gold - Posts: 2,121
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Joined: April 30, 2003
Posted: May 13, 2005 at 6:10 PM / IP Logged  
I have to back Steven up here by saying this is 100% my experience with the Extremis driver (the only XBL driver I've played with at any length so far). While originally concerned with efficiency, my concern was quickly alleviated as I turned up the volume knob. The driver just keeps getting louder without problem.
XBL2 is the real deal. I'll be upgrading to a new Brahma as soon as they're released.
New Project: 2003 Pathfinder
Steven Kephart 
Platinum - Posts: 1,737
Platinum spaceThis member has been recognized as an authority in Mobile Audio and Video. Click here for more info.spaceThis member consistently provides reliable informationspace
Joined: November 06, 2003
Location: Oregon, United States
Posted: May 13, 2005 at 6:48 PM / IP Logged  

Ok, I had our sales manager model the old Brahma compared to the Perfect in LspCad which is much more accurate than WinISD.  It shows the Perfect running out of excursion at less than 400 watts input in that enclosure.  With that limited power to the perfect and 600 watts on the Brahma, the output level is pretty much the same in the upper frequencies, with more extention on the low end going to the Brahma.  However the Perfect is at it's peak, while the Brahma can still go further yet if you have the power available.  This shows that although we are less efficient, we do have better low end extention in the same size enclosure.

Steven Kephart

Adire Audio

Master Asylum 
Silver - Posts: 400
Silver spacespace
Joined: November 05, 2004
Location: United States
Posted: May 14, 2005 at 12:21 PM / IP Logged  
Don't mind the jacking at all, as long as I learn something worth while, which I don't think anyone can highly contest this information isn't worthwhile. :)
1998 Monte Carlo w/
Eclipse CD8454
2xRockford 5.25" Power 2-way T152C
2xRockford 6"x9" Punch 3-way FRC4369
1xMemphis 16-MCH1300 5-channel
2xKicker 12" L5 Solobaric-2 Ohm
Francious70 
Silver - Posts: 629
Silver spacespace
Joined: July 26, 2004
Location: United States
Posted: May 15, 2005 at 11:31 PM / IP Logged  
Steven,
Could you get a pic of that graph?? What you're saying is that in the 1 cubic ft box, the Brahama will produce the same SPL with 600 watts than the Kappa will with 400 in the upper frequencies, but the Brahama will have more in SPL in the lower frequencies, all the while with lower distortion figures??
Paul
Steven Kephart 
Platinum - Posts: 1,737
Platinum spaceThis member has been recognized as an authority in Mobile Audio and Video. Click here for more info.spaceThis member consistently provides reliable informationspace
Joined: November 06, 2003
Location: Oregon, United States
Posted: May 16, 2005 at 2:42 AM / IP Logged  

Unfortunately I don't have a copy of LspCad on my work computer otherwise I could.  And yes, your conclusions look right. 

Steven Kephart

Adire Audio

Francious70 
Silver - Posts: 629
Silver spacespace
Joined: July 26, 2004
Location: United States
Posted: May 16, 2005 at 9:45 AM / IP Logged  
Well.. fantabulous. Is it going to be the same with the new Brahamas??
Paul
uthinkuknoaudio 
Silver - Posts: 760
Silver spacespace
Joined: October 08, 2004
Location: United States
Posted: May 16, 2005 at 4:10 PM / IP Logged  
Kappa Perfect is the choice... JL drivers are way to inefficient and Adire treated me like a booger when i tried to order one damn woofer for over 9 months and still haven't got it. Go with someone who knows what they are doing, Infinity.
"I don't play games. I play Nakamichi and that for real yo" - Probably some japanese kid said this in the early 80's trying to sell stereo out of his trunk lol.
uthinkuknoaudio 
Silver - Posts: 760
Silver spacespace
Joined: October 08, 2004
Location: United States
Posted: May 16, 2005 at 4:11 PM / IP Logged  
Oh yeah, throw it up for the Sound Splinter RLP series.
"I don't play games. I play Nakamichi and that for real yo" - Probably some japanese kid said this in the early 80's trying to sell stereo out of his trunk lol.
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