Crossover designing help needed. - Page 2

BobEllis · 27th January 2011, 02:16 PM

Glad to hear that you have mains power experience, and hopefully a healthy respect for the damage it can cause. I think Andrew is just expressing concern for your safety. There are a lot of people who come here and seem to know nothing, and we fear for their safety if they work with mains power.

So, are you planning an active crossover or passive? If active, are you interested in DIY analog, DIY DSP or a commercial crossover? Do you have measurement gear (a calibrated microphone and a preamp)? What are your goals for this system?

I just noticed your comment about winding inductors. Google inductor calculator, there are a few references that will help you figure out what you need to do. There are also a couple threads here about DIY inductors, IIRC. Do you have a source for 14 ga. magnet wire? for a couple pieces it will probably be about the same cost to purchase and wind your own.

MJL21193 · 27th January 2011, 02:44 PM

It seems to me that Viki-v2 has too many projects in mind - classic 'eyes too big for stomach' approach.
My advice is to pick one - do it, finish it, then move on to the next project. You will learn a lot and folks here will be happy to help if they see you are actually doing something.

tinitus · 27th January 2011, 03:33 PM

Quote:

Originally Posted by viki_v2

Hello,
I have just completed building my MTM floorstanders

pictures might help, info on drivers, box calculation/tuning, etc

viki_v2 · 27th January 2011, 04:10 PM

Yes , i will soon start the project.

viki_v2 · 28th January 2011, 10:28 AM

hello Everybody,
MJL21193 Can you share the layout of all in one jig for speaker workshop,

MJL21193 · 28th January 2011, 11:44 AM

Quote:

Originally Posted by viki_v2

MJL21193 Can you share the layout of all in one jig for speaker workshop,

Re-Jigging the jig: Speaker testing device for Arta, Speaker Workshop & HOLMImpulse

More than 250 posts worth of 'sharing'

Alex Copeland · 4th February 2011, 06:33 PM

Check this link for proper way to implement active (or passive) crossover :

http://www.auratronsystems.com

Then click "3PX8" "Design Philosophy".

This is a user-friendly explanation of factors you should consider.

BobEllis · 4th February 2011, 07:44 PM

Alex, you are starting to sound like you are shilling for auratron. As discussed in Charlie's thread there's a bunch of options and all engineering involves tradeoffs. That is one design philosophy but there are other equally valid philosophies. Each designer will choose his or her own priorities and design accordingly.

Viki - are those your measurements? I would have expected to see a larger bobble in the impedance curve at 2KHz where that response glitch is. How does your tweeter do down low? With woofer response like that, I'd try to cross as close to 1Khz as your tweeter will allow. You'll probably want a high order filter - like a Cauer with at least an 8th order initial roll off to protect the tweeter crossing low. That would also work well on the low pass to push down the woofer anomalies above 1500 Hz. Realistically, that woofer is begging to be part of a three way system.

adason · 4th February 2011, 07:47 PM

Quote:

Originally Posted by BobEllis

Realistically, that woofer is begging to be part of a three way system.

Exactly. Nice 2" dome midrange should rescue this to a nice 3-way.

Alex Copeland · 4th February 2011, 08:25 PM

Quote:

Originally Posted by BobEllis

Alex, you are starting to sound like you are shilling for auratron.

No more than you are for Linkwitz-Riley. I chose Auratron (there are others) because I have first-hand experience with their product and have found that their succinct analysis might be easier for non-technical people the understand. Also, citing a maufacturer that has adopted my philosophy adds credibility to my opinions. I hope to continue promoting the advantages of my philosophy in discussions where it has been overlooked or ignored because no one else is, but will henceforth not mention any established business. (I understand the sense of impropriety it portrays.)
What is the point of a person's fruitfull experiences if they cannot be shared with others?

4th February 2011, 06:33 PM	#17
Alex Copeland diyAudio Member Join Date: Jan 2011	To viki_v2: optimum crossover design Check this link for proper way to implement active (or passive) crossover : http://www.auratronsystems.com Then click "3PX8" "Design Philosophy". This is a user-friendly explanation of factors you should consider.

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27th January 2011, 02:16 PM	#11
BobEllis diyAudio Member Join Date: Sep 2003 Location: Upstate NY	Glad to hear that you have mains power experience, and hopefully a healthy respect for the damage it can cause. I think Andrew is just expressing concern for your safety. There are a lot of people who come here and seem to know nothing, and we fear for their safety if they work with mains power. So, are you planning an active crossover or passive? If active, are you interested in DIY analog, DIY DSP or a commercial crossover? Do you have measurement gear (a calibrated microphone and a preamp)? What are your goals for this system? I just noticed your comment about winding inductors. Google inductor calculator, there are a few references that will help you figure out what you need to do. There are also a couple threads here about DIY inductors, IIRC. Do you have a source for 14 ga. magnet wire? for a couple pieces it will probably be about the same cost to purchase and wind your own.

27th January 2011, 02:44 PM	#12
MJL21193 Account disabled at member's request Join Date: Mar 2007	It seems to me that Viki-v2 has too many projects in mind - classic 'eyes too big for stomach' approach. My advice is to pick one - do it, finish it, then move on to the next project. You will learn a lot and folks here will be happy to help if they see you are actually doing something.

28th January 2011, 10:28 AM	#15
viki_v2 diyAudio Member Join Date: Feb 2009 Location: India (Mumbai)	hello Everybody, MJL21193 Can you share the layout of all in one jig for speaker workshop,

4th February 2011, 07:44 PM	#18
BobEllis diyAudio Member Join Date: Sep 2003 Location: Upstate NY	Alex, you are starting to sound like you are shilling for auratron. As discussed in Charlie's thread there's a bunch of options and all engineering involves tradeoffs. That is one design philosophy but there are other equally valid philosophies. Each designer will choose his or her own priorities and design accordingly. Viki - are those your measurements? I would have expected to see a larger bobble in the impedance curve at 2KHz where that response glitch is. How does your tweeter do down low? With woofer response like that, I'd try to cross as close to 1Khz as your tweeter will allow. You'll probably want a high order filter - like a Cauer with at least an 8th order initial roll off to protect the tweeter crossing low. That would also work well on the low pass to push down the woofer anomalies above 1500 Hz. Realistically, that woofer is begging to be part of a three way system.