Active Crossover - diyAudio
Go Back   Home > Forums > Amplifiers > Chip Amps

Chip Amps Amplifiers based on integrated circuits

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 20th September 2003, 02:22 AM   #1
diyAudio Member
 
Join Date: Sep 2003
Location: Illinois
Default Active Crossover

I need a low pass active X-over that crosses over @ about 150hz. I would like to use the LM324, because I have many of them, plus I don't need to worry about split supplies. What resistor and cap values would I need, and how would I assemble it? This is for the other project I posted, the stereo system for the sub output plug. Thanks for the help.

-Mike
  Reply With Quote
Old 21st September 2003, 10:55 AM   #2
diyAudio Member
 
Hybrid fourdoor's Avatar
 
Join Date: May 2003
Location: Ft. Worth, TX
If you go to Linear Team's WinISD webpage and download the ISD program it has a active crossover tool in it. When it says which cap to use (says start will like 0.01uf or something), just enter a capacitor value and enter the crossover frequency and it will tell you which resistor values to use and it shows the schematic in a simplified manner. Its dirty, quick and cheap!

The capacitor part confused me for a while, cause I didn't knwo you had to enter that, and I didn't know that the capacitor could be constant.
  Reply With Quote
Old 21st September 2003, 05:33 PM   #3
zobsky is offline zobsky  India
diyAudio Member
 
zobsky's Avatar
 
Join Date: Mar 2002
Location: Dallas, Tx, USA
Quote:
Originally posted by Hybrid fourdoor
If you go to Linear Team's WinISD webpage and download the ISD program it has a active crossover tool in it. When it says which cap to use (says start will like 0.01uf or something), just enter a capacitor value and enter the crossover frequency and it will tell you which resistor values to use and it shows the schematic in a simplified manner. Its dirty, quick and cheap!

The capacitor part confused me for a while, cause I didn't knwo you had to enter that, and I didn't know that the capacitor could be constant.


ignorant question , ...but do you need a power supply for the WinISD active crossovers, ...didn't seem like it from using the software???
  Reply With Quote
Old 21st September 2003, 06:05 PM   #4
JoeBob is offline JoeBob  Canada
diyAudio Member
 
JoeBob's Avatar
 
Join Date: Nov 2001
Location: Montreal, Canada
Yup, the opamps need to be powered, usually from +/- 15V or +/- 12V. In chematics the power suply pin sonnections are often omitted because it is just a given that they must be powered.

Hope that helps.
  Reply With Quote
Old 23rd September 2003, 01:55 AM   #5
diyAudio Member
 
Join Date: Sep 2003
Location: Illinois
I would like to use the LM325. Will that work? Also, it is connecting between the selector switch logic and the 3886 amps on the amp I am using in the amplifier I am building. It connects to the subwoofer out plug. I need to combine the left and right inputs also. How would I do it?

Thanks, Mike
  Reply With Quote
Old 24th September 2003, 01:39 AM   #6
diyAudio Member
 
Join Date: Sep 2003
Location: Illinois
Sorry, I meant LM324, not 325.
  Reply With Quote

Reply


Hide 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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
active crossover: fir vs iir netchris Everything Else 3 29th July 2008 09:14 AM
Passive crossover into active crossover hahfran Multi-Way 16 10th February 2008 06:16 PM
PA vs DIY active crossover paulspencer Multi-Way 46 27th November 2004 01:25 AM
active crossover aaronboumans Analogue Source 4 31st May 2003 04:59 PM
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 01:15 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2