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Introduction
Here is the design for what I'll call the Vx2C. Vx2C simply stands for "Vifa times two Center". This speaker is actually just a variation of John K's P17/D25 design. As the intent was to use it as a matching center channel for the Vx2T, the baffle has a different size and layout, and I used the sheilded versions of the Vifa P17 and D25 drivers.



The Design
I decided to build a center channel speaker as an MT design because that would allow me to use the same components as the Vx2T. I didn't want to get into an MTM as it would require a whole new crossover design, and a much bigger cabinet.

Its pretty rare to see an MT design on its side being used as a center channel. PMC is one of the few companies I know that offer one, see their TB2 speakers. Based on the reviews this company gets I figured what the heck, these guys must know what they are doing. Besides, the fourth order L/R crossver should help minimize any dispersion problems.

The cabinet is sealed, and the plans call for 3/4" mdf in order to yeild an internal volume of 10.4 Litres. Running the driver's TS parameters through winISD shows a QTC of .71 and an F3 of approximately 80Hz. This is ideal for a center channel speaker as it lends to easy integration with a sub-woofer.

As can be seen by the cabinet dimensions, this box is relatively small and can easily be placed on top of a 27" or larger TV set. Depending on how deep the top of the TV is, the cabinet may overhang the back a few inches, but this is not a concern as most of the weight is in the front.


Click on driver for specs Click on driver for specs The drivers used are the Vifa P17SJ-00-08 mid-bass , and the Vifa D25ASG-05-06 tweeter. These are the shielded versions of the drivers used in the Vx2T.

The Vifa D25ASG is no longer listed on Vifa's web site so it may be discontinued. Check with your Vifa distributors for stock. As I write this most of the Vifa distributors have this tweeter. If you can't get the D25ASG, you may have to sheild a D25AG using a bucking magnet. I never used a bucking magnet to sheild a driver before, but I'm sure you can get some advice on one of the discussion boards. If you have a rear projection TV, you don't need the sheilded drivers, you can use the same drivers as in the Vx2T.

Click on the driver for specs.


Visit John K's P17/D25 Design for more information including system measurements.

Pictures will be posted shortly...



Wrap-up
Feel free to e-mail me any questions you may have about this design. I don't check this e-mail account that frequently so it may be easier to reach me at the MAD board. If you decide to build this design, I hope you will send me a review and pictures so I can post it here to others to see.

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