Newb question about impedence curve and crossovers?

JohnnyP00 · 10th January 2009, 03:59 PM

Hi,
I have a question about making crossovers on an impedence curve of a driver.

Say I want to make a crossover at around 3000hz on a woofer thats 8 ohms and a tweeter thats 4 ohms. Lets just say 12db LR. If I measure the impedence of the woofer at 3000hz it measures the impedence at 10.9 ohms for the woofer and 3.23 for the tweeter.

Would it be better to choose my crossover components at the measured impedence or the marked impedence...

Thanks for your help JohnnyP.

tinitus · 10th January 2009, 04:35 PM

Problem is that impedance changes all the way through
RC is a way to make a steady and predictable impedance
That each driver have different impedance doesnt matter, as each driver should be handled individually, as well as together

But still difficult to calculate
If you dont use measurement it might be better to use your ears carefully, rather than rely on simple calculations...but still very difficult

Fore a start the best you can do is to study as many well reputed speaker designers as possible

http://www.zaphaudio.com/index.html

http://www.humblehomemadehifi.com/

http://home.versatel.nl/chiararomee/diy/indexeng.htm

http://www.troelsgravesen.dk/Diy_Lou...r_Projects.htm

10th January 2009, 03:59 PM	#1
JohnnyP00 diyAudio Member Join Date: Nov 2007	Newb question about impedence curve and crossovers? Hi, I have a question about making crossovers on an impedence curve of a driver. Say I want to make a crossover at around 3000hz on a woofer thats 8 ohms and a tweeter thats 4 ohms. Lets just say 12db LR. If I measure the impedence of the woofer at 3000hz it measures the impedence at 10.9 ohms for the woofer and 3.23 for the tweeter. Would it be better to choose my crossover components at the measured impedence or the marked impedence... Thanks for your help JohnnyP.

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
LP & HP Filters & Crossovers, a few newb questions...	Lab_Rodent	Parts	3	16th February 2008 07:50 AM
What happens to sub impedence curve when a board is placed close to front?	eRiCdWoNg	Multi-Way	2	26th April 2004 06:17 PM
crossover and impedence question	dvd_diyer	Multi-Way	2	12th April 2004 11:31 PM
Impedence question	nnewton123	Multi-Way	3	5th February 2004 06:03 PM
Impedence question	squidbait	Multi-Way	4	9th January 2004 03:32 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

10th January 2009, 04:35 PM	#2
tinitus diyAudio Moderator Join Date: Nov 2005	Problem is that impedance changes all the way through RC is a way to make a steady and predictable impedance That each driver have different impedance doesnt matter, as each driver should be handled individually, as well as together But still difficult to calculate If you dont use measurement it might be better to use your ears carefully, rather than rely on simple calculations...but still very difficult Fore a start the best you can do is to study as many well reputed speaker designers as possible http://www.zaphaudio.com/index.html http://www.humblehomemadehifi.com/ http://home.versatel.nl/chiararomee/diy/indexeng.htm http://www.troelsgravesen.dk/Diy_Lou...r_Projects.htm

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