DIY active x-over for 2.1 application

peter_m · 13th December 2007, 06:05 PM

Hi everyone,

I am looking for an active crossover, like the ones you find in the average HT amp. With a variable frequency from 40 to 200hz. I need it to have both high-pass and low-pass outputs. This way I can re-use existing amps I have lying around for a 2.1 project.

Any chance of you guys seeing an inexpensive DIY design floating out there?

Peter

pedroskova · 13th December 2007, 06:30 PM

You could pick and choose from Linkwitz. Everything is there, just add psu.

Daveis · 14th December 2007, 12:46 AM

It doesn't appear that you can order PCB's from Linkwitz anymore.

The link for ordering instructions is dead.

There's an active crossover group buy. It's over now, but may start up again.

Active filter board GB

Marchand Electronics has some boards for 24db crossovers.

HiFiNutNut · 14th December 2007, 01:01 AM

Rod Elliot has PCB to sell.

http://sound.westhost.com

pedroskova · 14th December 2007, 01:17 AM

Quote:

Originally posted by Daveis
It doesn't appear that you can order PCB's from Linkwitz anymore.

The link for ordering instructions is dead.

There's an active crossover group buy. It's over now, but may start up again.

Active filter board GB

Marchand Electronics has some boards for 24db crossovers.

I wasn't thinking PCB's, just schematics. Linkwitz's PCB's would be overkill for what peter_m is proposing.

Davey · 14th December 2007, 01:30 AM

I'm sure Siegfried still has all of his PCB boards available.

Here's a better link:

http://www.linkwitzlab.com/pcb.htm#MT1

Dave.

ocool_15 · 14th December 2007, 02:09 AM

This isn't diy but is pretty good value.
creative sound reckhorn B-1 $88 shipped

ttan98 · 14th December 2007, 02:57 AM

easier get second-hand Behringer, Marchand, etc, at a cheap price.

I bought my Behringer 3-way x-over, 2nd hand at Ebay for AUD$80. you can convert to 3-way active x-over at later stage or sell it later if you want and you won't lose much money.

peter_m · 14th December 2007, 03:10 AM

Quote:

Originally posted by pedroskova
You could pick and choose from Linkwitz. Everything is there, just add psu.

Looks like what I am looking for... Ready made PCB are for cheaters!

Ok, what I want is this: http://www.linkwitzlab.com/filters.htm#3 I got the spreadsheet to calculate the R and C values. Now what about the OP amps? What are the IC modes numbers that I need? It doesn't specify anywhere. In a different forum someone mentioned the "NE5532".

Also does it require a special power supply or anything relatively clean will do?

Peter

Daveis · 14th December 2007, 03:14 AM

Quote:

Originally posted by peter_m

Looks like what I am looking for... Ready made PCB are for cheaters!

Aren't there issues with some of the modern fast opamps and board layout?

For instance, you couldn't just wire perf board or bread board could you?

13th December 2007, 06:05 PM	#1
peter_m diyAudio Member Join Date: May 2007	DIY active x-over for 2.1 application Hi everyone, I am looking for an active crossover, like the ones you find in the average HT amp. With a variable frequency from 40 to 200hz. I need it to have both high-pass and low-pass outputs. This way I can re-use existing amps I have lying around for a 2.1 project. Any chance of you guys seeing an inexpensive DIY design floating out there? Peter

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
irfp250 application	sakis	Solid State	9	11th April 2009 11:47 PM
CD4047 application	kct	Digital Source	0	23rd November 2008 06:19 PM
In Active crossover application, OPA2134 and OPA2604, which is better?	visualwang	Solid State	12	9th November 2006 07:32 PM
Old RCA application notes....where?	jez	Solid State	9	19th October 2006 11:04 AM
AGC for PA / SR application	AudioFreak	Solid State	4	13th February 2004 09:13 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

13th December 2007, 06:30 PM	#2
pedroskova RIP Join Date: Dec 2002 Location: C'ville VA, USA	You could pick and choose from Linkwitz. Everything is there, just add psu.

14th December 2007, 12:46 AM	#3
Daveis diyAudio Member Join Date: Dec 2003 Location: Des Moines, IA	It doesn't appear that you can order PCB's from Linkwitz anymore. The link for ordering instructions is dead. There's an active crossover group buy. It's over now, but may start up again. Active filter board GB Marchand Electronics has some boards for 24db crossovers.

14th December 2007, 01:01 AM	#4
HiFiNutNut diyAudio Member Join Date: May 2004 Location: Sydney	Rod Elliot has PCB to sell. http://sound.westhost.com

14th December 2007, 01:30 AM	#6
Davey diyAudio Member Join Date: Dec 2001 Location: Bremerton, WA.	I'm sure Siegfried still has all of his PCB boards available. Here's a better link: http://www.linkwitzlab.com/pcb.htm#MT1 Dave.

14th December 2007, 02:09 AM	#7
ocool_15 diyAudio Member Join Date: Nov 2004 Location: sk	This isn't diy but is pretty good value. creative sound reckhorn B-1 $88 shipped

14th December 2007, 02:57 AM	#8
ttan98 diyAudio Member Join Date: Apr 2006 Location: Melb	easier get second-hand Behringer, Marchand, etc, at a cheap price. I bought my Behringer 3-way x-over, 2nd hand at Ebay for AUD$80. you can convert to 3-way active x-over at later stage or sell it later if you want and you won't lose much money.

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