The Chorales - An Usher / Vifa Project

[hongrn]

Well, I promised my wife - and myself - that I wouldn't buy another pair of drivers until I started using what I have in the closet. So, in order to buy more drivers, I have to put together a couple of projects. Having just finished the crossover for the Renditions, I was itching to breathe some more saw dust. I had a pair of Usher 8945A woofers and XT25 tweeters that I acquired a while back from a couple of the members here, so here we are. This combo has been done many times in the DIY community, but who cares? I'm going to build myself another pair of speakers because I don't have enough. Hehe.

Day 1.
Broke the woofers in overnight and determined T/S parameters, then loaded them in BassBox Pro to model the box, which volume turns out to be 0.6 cu.ft (17" H X 8" W X 13" D), tuned at 40Hz, with a F3 of 45Hz. The vent is 2" X 7".

3/4" MDF is used, and the pieces are ready to be glued.

[hongrn]

Re: The Chorales - An Usher / Vifa Project

Day 2.

Just gluing away. In the mean time, I went to Zaph Audio to look at the measurements of the Ushers and the Vifas to find the best crossover point.

[Kevin K.]

Re: The Chorales - An Usher / Vifa Project

Well, I promised my wife - and myself - that I wouldn't buy another pair of drivers until I started using what I have in the closet. So, in order to buy more drivers, I have to put together a couple of projects. Having just finished the crossover for the Renditions, I was itching to breathe some more saw dust. I had a pair of Usher 8945A woofers and XT25 tweeters that I acquired a while back from a couple of the members here, so here we are. This combo has been done many times in the DIY community, but who cares? I'm going to build myself another pair of speakers because I don't have enough. Hehe.

Day 1.
Broke the woofers in overnight and determined T/S parameters, then loaded them in BassBox Pro to model the box, which volume turns out to be 0.6 cu.ft, tuned at 40Hz, with a F3 of 45Hz. The vent is 2" X 6".

3/4" MDF is used, and the pieces are ready to be glued.

What else do you have sitting around in the closet not being used? Nice!

[Beau]

Re: The Chorales - An Usher / Vifa Project

Wow

[hongrn]

Re: The Chorales - An Usher / Vifa Project

Day 3.

Boxes completed. Interior lined with acoustic foam. Vent installed using Home Depot PVC pipe (2-3/8" OD), and glued in place with epoxy. The hole was cut with a Milwaukee 2-3/8" hole saw, so the fit was perfect.

[hongrn]

Re: The Chorales - An Usher / Vifa Project

Day 4.

Baffles routed to countersink woofers and tweeters. Woofer holes chamfered and screw holes reinforced with birch plywood. Additional bracing added to baffles. Finally, baffles glued to boxes.

[hongrn]

Re: The Chorales - An Usher / Vifa Project

Day 5.

3/4" roundover applied to top of box and to vent hole. This is what the project will look like before being finished. This weekend, I will mount the drivers and proceed with near field and far field measurements, then model the crossover.

[craigk]

Re: The Chorales - An Usher / Vifa Project

Day 5.

3/4" roundover applied to top of box and to vent hole. This is what the project will look like before being finished. This weekend, I will mount the drivers and proceed with near field and far field measurements, then model the crossover.

Nice box design.

[Navy Guy]

Re: The Chorales - An Usher / Vifa Project

I like the look. Looking forward to seeing more

[Paul K.]

Re: The Chorales - An Usher / Vifa Project

I really like the way you dressed up the box with the added sides. I, however, would have considered a floor-standing mass-loaded or tapered TL for these woofers (I used an 8945A in my TL Cavatinas).
Paul

[kbzx35]

Re: The Chorales - An Usher / Vifa Project

Nice Hong! What's the plan for the finish?

[donradick]

Re: The Chorales - An Usher / Vifa Project

I made the same promise to my wife, but I find that I can distract her for a minute when the UPS driver
shows up, then the new drivers are safely in the basement.

Nice work!

[Ray Tremblay]

Re: The Chorales - An Usher / Vifa Project

Ooooh! Nice! Please keep us updated with pics.

[hongrn]

Re: The Chorales - An Usher / Vifa Project

Thanks everyone. The cab will probably have a black satin finish, and the sides will be real wood, but I don't know which kind yet.

Paul, good idea, that will give me an excuse to buy more drivers to try out a TL. Can I see a pic of the Cavatinas? Thanks.

[Paul K.]

Re: The Chorales - An Usher / Vifa Project

Sure, here it is:

And, here's a cabinet drawing:

Paul

Thanks everyone. The cab will probably have a black satin finish, and the sides will be real wood, but I don't know which kind yet.

Paul, good idea, that will give me an excuse to buy more drivers to try out a TL. Can I see a pic of the Cavatinas? Thanks.