Mike P.

I phoned Dale about a Havoc 18 a couple of days ago, super nice guy. For as much as a Havoc 18 weighs, shipping prices were great too!

Delete.

That amp has been tested and only puts out 580 watts. http://www.avsforum.com/avs-vb/showthread....49#post13714349

Is this for home audio?

Click on the last pic at the bottom of the page, all the measuremets are there. http://www.mach5audio.com/zen/index.php?ma...products_id=186

WinISD Pro. Free and excellent help files.

Same width and depth, double the height for 2 subs.

There is a design for that sub in the E.D. HT forum. Build this plan in double height and put both ports on the bottom. http://www.icixsound.com/vb/showthread.php...hlight=cheapest

"New Products For Semptember" shows the RL-i 8 Dual 4ohm. So we'll be seeing them in the store soon, correct?

That shouldn't happen. That's false information leading people to believe products are going to be available when they're not. Just my opinion.

RL-i 8 Dual 4ohm is showing in the SSA shop as "New Products For Septmenber". Hopefully soon.

I've been torturing mine in a home theater sub and that hasn't been a problem.

They're not posted yet. Should be coming soon.

It was a halloween costume. http://www.foxnews.com/story/0,2933,406101,00.html

http://incriminatoraudio.com/update/index....age=3&cat=2 Wow. I don't know how I missed that. Thanks though I'm pretty sure those recommendations are for car audio. Tuning a HT sub to 32-37 Hz makes no sense.

If you really want the low end output for HT, take a look at what people are building. How well a sub will perform depends on its parameters. Lots of examples here to give you an idea: http://www.hometheatershack.com/forums/diy...r-database.html

That is Josh's sub. 25 cubic feet, if I remeber correctly. Built by FunkyWaves. http://www.funkywaves.net/custom.cfm

Description of wiring options for the Atlas 12 and 15. http://web.archive.org/web/20050307070748/...dard+wiring.htm

Pro audio and home audio horns. http://www.billfitzmaurice.com/

It would help for people to know what year and model you're looking for.

The wife has a pair of Braxton Audio tower speakers in her work out room. These speakers are lacking in low end output and the wife asked if I could add a sub woofer to her system. She uses her system for watching movies, TV, and listening to music. I have a retired pair of 12" Shiva sonotubes that haven't been used since I built my pair of IXL-18's. Long story short, both Shiva tubes have a "clicking" sound when demands are put on them. I modeled the IXL-12 in 3.5 cu.ft., the net volume of the Shiva tube, and it looks good. IXL-12 arrives. Original Shiva sonotubes. IXL-12 and 3.5 cu. ft. tube. Removal of 12" Shiva. Comparison of Shiva and IXL-12. I remember paying $180 a piece for the Shiva's years ago, which is the same price as the IXL-12 today. It just goes to show how far subs have come in the last few years! Inside the sono tube. Got lucky! The sub cut out and bolt holes lined up perfectly! I had to add 10 inches on to the port length to lower the tuning to 18hz. The Shiva was tuned to 22hz. I moved an Atlas 15" aside and hooked up the IXL-12 to do some testing. I powered the IXL-12 with a 360 watt plate amp and turned off all other subs. No break in period, put in a test tone CD and cranked it up. I'm amazed with what this sub can do. I was not expecting this kind of output from a 12 inch sub. The sound was excellent, no mudiness or boominess, just loud clean bass. Test tones in the 16hz to 20hz region made the walls vibrate and shake, the same as my larger subs do. With 360 watts input, this sub is no where near it's maximum excursion and port noise was a non issue. To get the most from this sub, 800 watts input would be about right in this net volume and a 18 hz subsonic filter should be applied. Port diameter would have to be increased to avoid port chuffing. Now I have to install this sub in a 12' x 8' work out room. I can't wait to see the expression on my wife's face when she hears it for the first time!

The sonotube I used for this "retrofit" was from a Shiva build and the net volume of this tube (height) is not ideal for the IXL-12. The problem is with the vent airspeed being too high with only one 4 inch port. With a single 4 inch flared port with an input power of 360 watts, the port airspeed is way past the point of compression. A proper designed HT cabinet for this sub should be 4 cubic feet net volume tuned to 20 hz with two 4 inch flared ports 39 inches long, or a slot port the same length with an area of 25 square inches. With this porting airspeed would be 21 m/s at 20 hz with 500 watts of input power. If input power were to be increased to 800 watts, the Xmax would still be within limits and the airspeed would be 26 m/s, just below the point of compression. A subsonic filter would be needed at 18 hz with this design. A sonotube build is not out of the question, but incorporating two 4 inch flared ports 39 inches long would be a challenge. The use of elbows would probably be required. As for finishing the sonotube, I did it the easy way. Both endcaps were primed with a latex primer and then I applied two coats of latex semi gloss black paint. The tube was also primed and painted black, and then covered in grill cloth. The cloth is wrapped around the tube, overlapped an inch or so, and fastened with velcro.

Ask him and find out. http://www.affordabledrivers.com.au/index....page=contact_us

Canada is like your virgin sister, still clean and pure.

With 600 watts input the air speed is 36 m/s with a single 6 inch port. With two 6 inch ports the air speed is 18 m/s. If you're going for SPL then go with the dual ports.