Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

adding a crossover to an active subwoofer
adding a crossover to an active subwoofer
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
Reply
 
Thread Tools Search this Thread
Old 18th January 2006, 12:43 AM   #1
Saltuk is offline Saltuk  Turkey
diyAudio Member
 
Join Date: Jan 2006
Location: Home
Default adding a crossover to an active subwoofer

Hi , I got an active subwoofer from a friend and I am willing to use it in my second system , the sub is a part of a Sony 5.1 package "Sony SA-VE155/S" http://www.zigzag.am/productinfo.html?id=172156&l=am
as you can see in the link the satellites are very small and has no bass so the sub starts to take role from 150hz down to 28hz(actually the sub has a 6.5" driver it peaks around 50hz and barely audible lower than that )
What I am planning to do is build a proper cabinet , get a high efficiency driver ( at least 12" ) and use the amp of the sony's to build a new sub , because in my second system ( it is a stereo ) I am using Sonic impact T-amp and for speakers a 25x30x30 cm cabinet made of 30mm mdf with JVC CS-XV620 car audio fullrange drivers ( 6.5" 35-25000hz ) , so I want the subwoofer to work under 80hz or lower , I came across cheap low pass filters for subs on ebay like :http://cgi.ebay.com/PYRAMID-CR66-SUB...QQcmdZViewItem
The subwoofer has no lowpass settings just an analogue input , power button and a volume knob , can I add the lowpass elektronic crossover between the sub amp and the driver , any suggestions?
Regards Saltuk
  Reply With Quote
Old 18th January 2006, 05:19 AM   #2
Destroyer OS is offline Destroyer OS
diyAudio Member
 
Destroyer OS's Avatar
 
Join Date: Nov 2005
Well if you are using the same sony amplifier then it should still have the lowpass in it....
  Reply With Quote
Old 18th January 2006, 10:48 AM   #3
Saltuk is offline Saltuk  Turkey
diyAudio Member
 
Join Date: Jan 2006
Location: Home
I am afraid you have mis understood me.
  Reply With Quote
Old 18th January 2006, 11:11 AM   #4
richie00boy is offline richie00boy  United Kingdom
Did it Himself
diyAudio Member
 
richie00boy's Avatar
 
Join Date: Nov 2003
Location: Gloucestershire, England, UK
adding a crossover to an active subwoofer
No, you have misunderstood him

There must already be a low-pass filter on the amp somewhere as you say it cust off about 150Hz. Therefore, find the bit that does this then replace resistors and/or capacitors to change the frequency to what you desire.

Unless of course the Sony is a bandpass box design.
__________________
www.readresearch.co.uk my website for UK diy audio people - designs, PCBs, modules and more.
  Reply With Quote
Old 18th January 2006, 11:54 AM   #5
Saltuk is offline Saltuk  Turkey
diyAudio Member
 
Join Date: Jan 2006
Location: Home
Sorry , I think I should have mentioned that I have no idea about
resistors and/or capacitors and modifying them , ofcourse there is a lowpass filter in the sony but the point is that it is not low enough and not adjustable ( at least from the control panel ) as I have no idea how to modify the resistors and/or capacitors I am willing to add another lowpass filter between the sony's amp and the driver to have the roll of starting from atleast 80hz or below ,
  Reply With Quote
Old 18th January 2006, 12:52 PM   #6
pinkmouse is offline pinkmouse  Europe
diyAudio Moderator
 
pinkmouse's Avatar
 
Join Date: Apr 2002
Location: Rotherham, England
adding a crossover to an active subwoofer
I'd sell the Sony, and start from scratch with the new driver and get a plate amp with the required crossover if I were you. You have much more chance of a successful result.
__________________
Rick: Oh Cliff / Sometimes it must be difficult not to feel as if / You really are a cliff / when fascists keep trying to push you over it! / Are they the lemmings / Or are you, Cliff? / Or are you Cliff?
  Reply With Quote
Old 18th January 2006, 01:40 PM   #7
richie00boy is offline richie00boy  United Kingdom
Did it Himself
diyAudio Member
 
richie00boy's Avatar
 
Join Date: Nov 2003
Location: Gloucestershire, England, UK
adding a crossover to an active subwoofer
Modding the Sony is no harder than adding (building) an additional filter.

I agree with Pinkmouse though, a plate amp will be a better result all round.
__________________
www.readresearch.co.uk my website for UK diy audio people - designs, PCBs, modules and more.
  Reply With Quote
Old 19th January 2006, 05:08 PM   #8
Saltuk is offline Saltuk  Turkey
diyAudio Member
 
Join Date: Jan 2006
Location: Home
Thanks for your answers but I didnt have my question answered still , can I add the "passive subwoofer low pass filter(the link to the item is at the first post of my thread)" to the sony by connecting the two cables that come out from the sony amp( which feeds the driver with 45 watts of power with the signal of 150hz to 28 hz) to the extra lowpass filter and from that filter to the subwoofer driver ? I just wish to know that ,
Regards,
Saltuk.
  Reply With Quote
Old 19th January 2006, 05:34 PM   #9
richie00boy is offline richie00boy  United Kingdom
Did it Himself
diyAudio Member
 
richie00boy's Avatar
 
Join Date: Nov 2003
Location: Gloucestershire, England, UK
adding a crossover to an active subwoofer
The eBay item is not a passive filter, you cannot connect it between the amp and drive unit. However, you can connect it between the source and the amp.
__________________
www.readresearch.co.uk my website for UK diy audio people - designs, PCBs, modules and more.
  Reply With Quote
Old 20th January 2006, 03:37 PM   #10
Saltuk is offline Saltuk  Turkey
diyAudio Member
 
Join Date: Jan 2006
Location: Home
Thanks alot , that was what I needed to know.
  Reply With Quote

Reply


adding a crossover to an active subwooferHide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Active subwoofer crossover question? goldyrathore Subwoofers 4 1st January 2014 09:48 AM
adding tone control to active crossover Dan2 Solid State 5 5th December 2008 02:35 PM
subwoofer crossover passive and active yikchean Subwoofers 3 3rd December 2006 02:18 PM
adding active xo to the mix Jean Multi-Way 2 13th March 2003 05:38 AM
XVR1 active crossover, discrete active stage promitheus Pass Labs 18 22nd July 2002 01:29 AM


New To Site? Need Help?

All times are GMT. The time now is 09:13 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright ©1999-2017 diyAudio
Wiki