Extreme extention??

mp006ltk · 17th December 2004, 08:50 PM

Hi, I am building a pair of superspeakers and instead of trying to build a 4 way design to pick up the absolute botom end, i am going to build a matched subwoofer. It will be digitally crossed over to match the speakers and I think I am going to use a crown or crest Pro Audio amp. I don't so much need bass as I really need extention. The main speakers will have dual 8" Eton 8/800 so I just need something for the rock bottom. I am in debate on which sub to use. The options I am looking at are the peerless xls 12" with a passive radiator, the Dayton 12" in a roughly 2.5 cu. ft. box or maybe some type of car audio driver. I have looked at the Diamond TDX but they dont' really extend that well. If I'm going to be using an active crossover here does the f3 of the system really matter anymore?????? any other drivers I may have overlooked are also welcome.... Thanks!!

Real_Macgyver · 17th December 2004, 09:00 PM

I would go for the TC Sounds 12" driver with 3" linear travel voicecoil.

With active crossover you can compensate for almost any parameter of the driver.

BAM · 17th December 2004, 10:43 PM

Use a BIG driver, like the Adire Maelstrom, and tune LOW. It will be a closet-sized box, but it should match okay with a main speaker with good extension and output potential.

Paradise_Ice · 18th December 2004, 03:45 AM

Eleborate on the cross over range of each drive unit,

The peerless xls is a very good unit, my choice over the other two.

BAM · 18th December 2004, 03:58 AM

Cross over to the big sub at about 50 Hz, or below. Your mains should have plenty of output to there. Or, if you don't want to high-pass the mains, then you'll need to make sure that where you cross over is sufficiently below the cutoff of the main speakers that between the slope of the mains' rolloff and the slope of the low pass on the subwoofer, you get a flat response.

simon5 · 18th December 2004, 09:38 AM

Just use a line array of Tumult...

mp006ltk · 18th December 2004, 09:53 AM

I am thinking either an xls or an xxls with the passive rasiator, and a digital crossover that has a 24 db/octave low pass and another high pass at 17hz Since the crossover is digital I can manipulate it to be a custom fit to the natural bottom end of my mains. I don't want to contaminate the signal path with an additional crossover for the main speakers. The sub, I don't mind a little creative manipulation to get things to fall into place.

17th December 2004, 08:50 PM	#1
mp006ltk diyAudio Member Join Date: Oct 2004	Extreme extention?? Hi, I am building a pair of superspeakers and instead of trying to build a 4 way design to pick up the absolute botom end, i am going to build a matched subwoofer. It will be digitally crossed over to match the speakers and I think I am going to use a crown or crest Pro Audio amp. I don't so much need bass as I really need extention. The main speakers will have dual 8" Eton 8/800 so I just need something for the rock bottom. I am in debate on which sub to use. The options I am looking at are the peerless xls 12" with a passive radiator, the Dayton 12" in a roughly 2.5 cu. ft. box or maybe some type of car audio driver. I have looked at the Diamond TDX but they dont' really extend that well. If I'm going to be using an active crossover here does the f3 of the system really matter anymore?????? any other drivers I may have overlooked are also welcome.... Thanks!!

18th December 2004, 09:38 AM	#6
simon5 diyAudio Member Join Date: Nov 2004 Location: Québec, Québec	Just use a line array of Tumult... __________________ DIYaudio for President !

18th December 2004, 09:53 AM	#7
mp006ltk diyAudio Member Join Date: Oct 2004	crossover I am thinking either an xls or an xxls with the passive rasiator, and a digital crossover that has a 24 db/octave low pass and another high pass at 17hz Since the crossover is digital I can manipulate it to be a custom fit to the natural bottom end of my mains. I don't want to contaminate the signal path with an additional crossover for the main speakers. The sub, I don't mind a little creative manipulation to get things to fall into place.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Really, really extreme phono, more extreme than mine	peranders	Analogue Source	34	23rd October 2002 12:59 AM

New To Site?	Need Help?
Register to Participate Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

17th December 2004, 09:00 PM	#2
Real_Macgyver diyAudio Member Join Date: Aug 2004 Location: Sweden	I would go for the TC Sounds 12" driver with 3" linear travel voicecoil. With active crossover you can compensate for almost any parameter of the driver.

17th December 2004, 10:43 PM	#3
BAM diyAudio Member Join Date: Sep 2001 Location: Carmel, IN; West Lafayette, IN	Use a BIG driver, like the Adire Maelstrom, and tune LOW. It will be a closet-sized box, but it should match okay with a main speaker with good extension and output potential.

18th December 2004, 03:45 AM	#4
Paradise_Ice diyAudio Member Join Date: Jun 2004 Location: cosmological consciousness	Eleborate on the cross over range of each drive unit, The peerless xls is a very good unit, my choice over the other two.

18th December 2004, 03:58 AM	#5
BAM diyAudio Member Join Date: Sep 2001 Location: Carmel, IN; West Lafayette, IN	Cross over to the big sub at about 50 Hz, or below. Your mains should have plenty of output to there. Or, if you don't want to high-pass the mains, then you'll need to make sure that where you cross over is sufficiently below the cutoff of the main speakers that between the slope of the mains' rolloff and the slope of the low pass on the subwoofer, you get a flat response.