Originally Posted by R Swerdlow
Thanks. Call me Richard
. I rarely post here on AVS, and usually hang out at Audioholics.
I probably learned more from talking to people at DIY speaker builders' meetings that occasionally happened in the DC/Maryland/Virginia area where I live. I met a few very experienced and friendly designers who were glad to show and explain things to new guys.
When I read Marty's post, I recognized enough of myself to want to respond.
Many thanks to both you, Coctostan, Gbegland, and Djkest! You guys really are very nice for helping me with this.
So let me get this straight..as far as a 2-way monitor goes, I need to find a tweeter that can go low enough to cross to a woofer, before it begins to break up, preferably one with an Fs of three times lower than the crossover point to the woofer. Then I would need to find a woofer that can play up to the intended crossover point of the tweeter, without beaming or loosing off axis responce, right?
Several questions that I was hoping someone like Coctostan, Grag, Richard or whoever, could possibly help answer these questions.
1. How do I know when and where a particular woofer, or mid-range driver, are going to beam? Is there a specific measurement for that?
2. How do I figure out when a tweeter, (be it a ribbon, dome, or CD) is going to break up? Is there a way to measure this?
3. How do I figure out whether the particular driver that I am looking at is going to perform ok off-axis, versus on-axis?
4. With regards to directivity of woofers, does the directivity lower for larger woofers, such as 15's or 18's, versus the directivity or smaller woofers, such as 8's or 10's? What, if any, is the relationship between drivers and their size? Does this same thing apply to both tweeter and mid-range drivers' directivity?
Many thanks for all of your help guys!