New Project Build Thread

ryoung · 18th April 2008, 10:37 PM

After building my first 2 way bookshelf, I was looking for something a bit more "hi-fi" and have been working on this design for a while. At this point my drivers of choice are the Scan-Speak D3004/6600 for the tweeter and the Revelator 22W/4851T. I'm still working on the crossover, but any suggestions would be great.

ryoung · 18th April 2008, 10:41 PM

heres an exploded view

Jay_WJ · 19th April 2008, 12:34 AM

Considering this 8" driver's beaming, I'd cross it at 1.5 to 1.6 kHz LR4. 2 kHz LR4 will be the highest possible. If you want to try LR2 with a delay network, you need to consider 7" or smaller driver.

If you want to cross low, the 7100 is a better choice than the 6600. The Peerless 810921 or the Dayton RS28A-4 is a low cost alternative for low crossover freq.

What's the cabinet volume? You will need at least 1 cu ft for this 8".

ryoung · 19th April 2008, 12:47 AM

Cabinet volume is 1.25cu ft, port is 3"x8". My initial thoughts on the crossover was a 1500kHz crossover point for the drivers...I'd looked at the 7100 and havent been able to decide between that one and the 6600. Maybe i'll buy both and try them out!

Jay_WJ · 19th April 2008, 12:53 AM

According to Zaph's measurements, the 7100 has lower distortions below 1.5 kHz than the 6600.

http://www.zaphaudio.com/tweetermishmash/compare.html

ryoung · 19th April 2008, 01:15 AM

7100 it is then.

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19th April 2008, 12:34 AM	#3
Jay_WJ diyAudio Member Join Date: Mar 2006 Location: Indiana	Considering this 8" driver's beaming, I'd cross it at 1.5 to 1.6 kHz LR4. 2 kHz LR4 will be the highest possible. If you want to try LR2 with a delay network, you need to consider 7" or smaller driver. If you want to cross low, the 7100 is a better choice than the 6600. The Peerless 810921 or the Dayton RS28A-4 is a low cost alternative for low crossover freq. What's the cabinet volume? You will need at least 1 cu ft for this 8".

19th April 2008, 12:47 AM	#4
ryoung diyAudio Member Join Date: Sep 2007	Cabinet volume is 1.25cu ft, port is 3"x8". My initial thoughts on the crossover was a 1500kHz crossover point for the drivers...I'd looked at the 7100 and havent been able to decide between that one and the 6600. Maybe i'll buy both and try them out!

19th April 2008, 12:53 AM	#5
Jay_WJ diyAudio Member Join Date: Mar 2006 Location: Indiana	According to Zaph's measurements, the 7100 has lower distortions below 1.5 kHz than the 6600. http://www.zaphaudio.com/tweetermishmash/compare.html

19th April 2008, 01:15 AM	#6
ryoung diyAudio Member Join Date: Sep 2007	7100 it is then.

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