Sub design - need a little advice

Glen1 · 15th February 2006, 10:52 AM

Hi Guys,
I took the plunge a little while ago and built a sub using a Peerless 12" XLS 830500 driver in 47 litre ported box with a 90 mm port 75 cm in length ported to the front. The box is made from 32 ml mdf and I have a 14" square room. I'm using a 180 wrms plate amp to run the sub. I have found that this design allows the response to go really low but at times doesn't have the 'punch' I desire. The amount of bass produced is fine and the low end response seems pretty good but I'd like the sub to have a bit more dynamic 'punch'. I have tried it in a smaller 38 litre box with a 90 mm port 50 cm in length and this seemed to have a little more 'punch' but the bottom end just wasn't there. I've poured over Winpro for hours but as this is my first attempt I'm looking for a little advice.

Ta,
Glen

richie00boy · 15th February 2006, 11:06 AM

It would seem you like to hear a peaky bass. Stick with your bigger box and tuning (although I feel the vent diameter is too small) and play with the upper cutoff frequency and level to see if that helps. Failing that, build a parametric EQ, just one will do.

JRace · 15th February 2006, 11:35 PM

Punch is most often Mid bass (100-500Hz approx).

What is your x-over settings, and what speakers are you using to suplement the sub?

Glen1 · 16th February 2006, 05:06 AM

Cross over is 80 hz and I'm using Epos M22 for mains and M8 for centre. Mains and centre run as 'small'. HT amp is HK AVR 635.

David Gatti · 16th February 2006, 05:59 AM

Have you tried stuffing the port for a sealed enclosure response?
It may be a group delay or room-integration issue that could be helped with 12dB rolloff. An easy experiment worth trying.

15th February 2006, 10:52 AM	#1
Glen1 diyAudio Member Join Date: Oct 2005	Sub design - need a little advice Hi Guys, I took the plunge a little while ago and built a sub using a Peerless 12" XLS 830500 driver in 47 litre ported box with a 90 mm port 75 cm in length ported to the front. The box is made from 32 ml mdf and I have a 14" square room. I'm using a 180 wrms plate amp to run the sub. I have found that this design allows the response to go really low but at times doesn't have the 'punch' I desire. The amount of bass produced is fine and the low end response seems pretty good but I'd like the sub to have a bit more dynamic 'punch'. I have tried it in a smaller 38 litre box with a 90 mm port 50 cm in length and this seemed to have a little more 'punch' but the bottom end just wasn't there. I've poured over Winpro for hours but as this is my first attempt I'm looking for a little advice. Ta, Glen

15th February 2006, 11:06 AM	#2
richie00boy Did it Himself diyAudio Member Join Date: Nov 2003 Location: Gloucestershire, England, UK	It would seem you like to hear a peaky bass. Stick with your bigger box and tuning (although I feel the vent diameter is too small) and play with the upper cutoff frequency and level to see if that helps. Failing that, build a parametric EQ, just one will do. __________________ www.readresearch.co.uk my website for UK diy audio people - designs, PCBs, kits and more

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Class D Design needs your Advice	alijoorabchi	Class D	6	29th April 2007 10:09 PM
Advice needed for amp design	gpond	Chip Amps	3	29th August 2006 05:30 PM
Advice needed for amp design	ifrythings	Solid State	26	13th May 2006 01:17 PM
PCB Design problem.. Pls advice	xitronics	Everything Else	5	29th October 2005 05:19 PM

New To Site?	Need Help?
Register to Participate Search 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

15th February 2006, 11:35 PM	#3
JRace diyAudio Member Join Date: Jan 2006 Location: Vernon, BC	Punch is most often Mid bass (100-500Hz approx). What is your x-over settings, and what speakers are you using to suplement the sub?

16th February 2006, 05:06 AM	#4
Glen1 diyAudio Member Join Date: Oct 2005	Cross over is 80 hz and I'm using Epos M22 for mains and M8 for centre. Mains and centre run as 'small'. HT amp is HK AVR 635.

16th February 2006, 05:59 AM	#5
David Gatti diyAudio Member Join Date: Mar 2004 Location: Melbourne, Australia	Have you tried stuffing the port for a sealed enclosure response? It may be a group delay or room-integration issue that could be helped with 12dB rolloff. An easy experiment worth trying.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)