After what seems to be an eternity, I have finally finished a pair of the NeoD CC’s.
I was fortunate enough to get the tweeters before they were hard to get. In fact I like these speakers so much I have 5 extra tweeters for 2 more stereo sets.
As the speakers are destined for my bedroom and there really isn’t any room for a traditional cube sub (may be an IB in the future – who knows), I wanted extended base response, so I took Jon’s advice and built larger boxes.
The boxes (outside) are 33” x 9” x 13.5”. This yields 1.64 cubic ft box. With crossovers, bracing and speaker the volume is estimated to be 1.4 cubic feet. This follows Jon’s recommendation of a bigger box with 46 l gross (1.6 cubic feet) yielding 40 l net volume (1.4 cubic feet).
Following the instructions from other posts, the baffles (per the original design) are 9” wide so as not to mess up the BSC and the drivers are spaced as per the original design so the speakers can either be stood upright or laid flat.
I really liked the looks of the Zaph’s ZDT3.5 center channel with the two forward firing ports.
Using this idea, the NeoD CC’s I built have 2 forward firing ports and the speakers have a definite ZDT 3.5 center channel look.
The two, 2” ports are tuned to 33 Hz. The ports are 9” long and have a combine area of 6.28 sq inches. WinSpeakerz recommends a minimum vent area of 5.25 sq inches to avoid port noise. I have played the speakers quite (very) loud and so far have not heard any port noise.
Here is a picture of the front of the speakers
I used all air core inductors with solid wire (no foil). Most of the larger gauge coils (12 and 14 gauge) came from Solen while the smaller gauge coils from PE. A combination of Dayton and Solen Cap’s were used. I am not sure I can hear the difference between these and more expensive caps, that’s just me, each to their own.
I was very surprised as to just how big and heavy the crossovers are when they are assembled. The 12 and 14 gauge coils are heavy and the 100 uF caps are huge! Solen list the coils on their web site but many of them are wound to order. The Solen coils took about two weeks to get to me. Not a big deal as this was a slow roll project.
The coils were placed on the board following the guidelines as set out here
Thank-you Thomas for posting the link in the following post
The internal wiring is all 14 gauge multi strand copper wire that I got from my local auto supply house. I used 12 gauge wire for the woofers. Probably overkill, but isn’t that what DIY is all about?
I used joint connector bolts to attach the rear panel. Good thing because I had miss wired one of the crossover’s and it was very easy to get access to it to fix it.
Here is the thread that list sources
The boxes are reasonably well braced. Again, I borrowed from Zaph and used a bracing scheme very similar to the ZDT3.5 center channel. The center hole in the side braces is aligned to support the port.
Continued in next post....
I was fortunate enough to get the tweeters before they were hard to get. In fact I like these speakers so much I have 5 extra tweeters for 2 more stereo sets.
As the speakers are destined for my bedroom and there really isn’t any room for a traditional cube sub (may be an IB in the future – who knows), I wanted extended base response, so I took Jon’s advice and built larger boxes.
The boxes (outside) are 33” x 9” x 13.5”. This yields 1.64 cubic ft box. With crossovers, bracing and speaker the volume is estimated to be 1.4 cubic feet. This follows Jon’s recommendation of a bigger box with 46 l gross (1.6 cubic feet) yielding 40 l net volume (1.4 cubic feet).
Following the instructions from other posts, the baffles (per the original design) are 9” wide so as not to mess up the BSC and the drivers are spaced as per the original design so the speakers can either be stood upright or laid flat.
I really liked the looks of the Zaph’s ZDT3.5 center channel with the two forward firing ports.
Using this idea, the NeoD CC’s I built have 2 forward firing ports and the speakers have a definite ZDT 3.5 center channel look.
The two, 2” ports are tuned to 33 Hz. The ports are 9” long and have a combine area of 6.28 sq inches. WinSpeakerz recommends a minimum vent area of 5.25 sq inches to avoid port noise. I have played the speakers quite (very) loud and so far have not heard any port noise.
Here is a picture of the front of the speakers
I used all air core inductors with solid wire (no foil). Most of the larger gauge coils (12 and 14 gauge) came from Solen while the smaller gauge coils from PE. A combination of Dayton and Solen Cap’s were used. I am not sure I can hear the difference between these and more expensive caps, that’s just me, each to their own.
I was very surprised as to just how big and heavy the crossovers are when they are assembled. The 12 and 14 gauge coils are heavy and the 100 uF caps are huge! Solen list the coils on their web site but many of them are wound to order. The Solen coils took about two weeks to get to me. Not a big deal as this was a slow roll project.
The coils were placed on the board following the guidelines as set out here
Thank-you Thomas for posting the link in the following post
The internal wiring is all 14 gauge multi strand copper wire that I got from my local auto supply house. I used 12 gauge wire for the woofers. Probably overkill, but isn’t that what DIY is all about?
I used joint connector bolts to attach the rear panel. Good thing because I had miss wired one of the crossover’s and it was very easy to get access to it to fix it.
Here is the thread that list sources
The boxes are reasonably well braced. Again, I borrowed from Zaph and used a bracing scheme very similar to the ZDT3.5 center channel. The center hole in the side braces is aligned to support the port.
Continued in next post....
Having said that the speakers sound fantastic - clearly a function of the cross over design. The really amazing part about these speakers is the integration of the drivers and low distortion. I previously thought my B&W 802`s were near perfection. After listening to the NeoD CC`s I can now hear the distortion in the 802`s.
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