Fe107e offset driver TL

Dave Jones · 5th May 2004, 07:31 PM

Hey guys, would you be kind enough to criticize a proposed design? Check out the thread below.
The design is in message #8. By the way, I used 4.5 for BL, and 16*pi cm^2 for the effective cone area.

Calculate BL

Bob Brines · 6th May 2004, 12:21 AM

Looking at the plot, assuming that the input parameters are correct, something is very wrong here. My gut feeling without running sims is that the pipe is way to big for the driver. It is also way over stuffed, as can be seen by the gradual fall-off at the low end. But, it needs the stuffing to smooth out the higher harmonics, and it's not doing that well.

I don't like small drivers in pipes. There is too much temptation to make the driver go too low. The FE107E is a mid-tweet, not a mid-bass. It deserves to be used as such in a horn or OB, or even a sealed box, but not in a pipe.

Just my opinion. Sorry.

Dave Jones · 6th May 2004, 02:20 AM

Yep. It's junk. Everyone please disregard. :-(

5th May 2004, 07:31 PM	#1
Dave Jones diyAudio Member Join Date: Jul 2003 Location: Silicon Valley	Fe107e offset driver TL Hey guys, would you be kind enough to criticize a proposed design? Check out the thread below. The design is in message #8. By the way, I used 4.5 for BL, and 16*pi cm^2 for the effective cone area. Calculate BL __________________ Davy Jones

6th May 2004, 02:20 AM	#3
Dave Jones diyAudio Member Join Date: Jul 2003 Location: Silicon Valley	Yep. It's junk. Everyone please disregard. :-( __________________ Davy Jones

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6th May 2004, 12:21 AM	#2
Bob Brines diyAudio Member Join Date: Jan 2003 Location: Hot Spring Village AR	Looking at the plot, assuming that the input parameters are correct, something is very wrong here. My gut feeling without running sims is that the pipe is way to big for the driver. It is also way over stuffed, as can be seen by the gradual fall-off at the low end. But, it needs the stuffing to smooth out the higher harmonics, and it's not doing that well. I don't like small drivers in pipes. There is too much temptation to make the driver go too low. The FE107E is a mid-tweet, not a mid-bass. It deserves to be used as such in a horn or OB, or even a sealed box, but not in a pipe. Just my opinion. Sorry.