Pointy speaker started

ugly_woofer

Hey guys I thought I would post in a new thread so as not to hijack dcibels shape thread.
The woofers are Hivi f8's courtesy of JR, thanks JR, and the mid is a Hivi Dmna dome.  I turned a piece of aluminum into a shallow wave guide and used it to replace the stock flange.  I have to admit that the reason for the wave guide has less to do with performance and more of a means for me to move the dome backward and have a grill that can stay on without affecting the sound.  I'll snap a better picture of the dome/waveguide when I get a chance.

ani_101

Oooo nice.... rear mounted woofers too...

4thtry

Cool.   Is that a 1.5" radius roundover? 

PWRRYD

I like them Nick!  That's a lot of speaker.

squamishdroc

Fun project! How tall are they?

ugly_woofer

Ani, the woofers aren't rear mounted, the front is actually going to become the grill.  
Bill the radius is 3/4".  I originally had planned on a 1-1/4" radius, but went with the 3/4" for ease, as this is just a proof of concept at this point.  I may go larger, but I'm not sure at this point. No pun intended.
The wave guide is cut with  a 3" radius, and the speaker with be between 51 and 52 inches tall, depending on the base, which is necessary due to the 4" port on the bottom.

dcibel

I like the "grill" idea, does that mean you're covering it in fabric?

ugly_woofer

yes, the bare mdf will be painted black and covered with grill cloth.

ani_101

I like the grill idea. I assume you will be measuring with the MDF grill frame in place?

ugly_woofer

I will measure with the grill on, as it is meant to be listened to that way.  Hey Ani how is the new tube amp? do you like it better than the hypex amp.

PWRRYD

Are you going to paint those aluminum guides black?

6thplanet

That's a definite candidate for some anodizing....
Looking good Nick!

PWRRYD

Any progress you'd like to share on these Nick?

ugly_woofer

I originally only built one cabinet as a trial run, so I have been constructing the second one...it still needs the driver openings cut.  I really didn't think that anyone would  be that interested in one of my designs as they aren't that easy to duplicate.  
To be completely honest, I have lacked focus lately, too many ideas and not enough time.  My wife convinced me to finish the Carl and Stuart minion build for MWAF, so I have been trying to make progress with that build, it has changed direction again.  Oh yeah I also came into some vinyl, eight tubs to be exact.  Here is a picture of the backside mounting of one of the domes, and one tub of records.

ugly_woofer

ugly_woofer

Made a little progress, did some bracing.

ugly_woofer

After much debate I have decided to paint these guy's. I am currently soaking the end grain with epoxy, and I think that I have come up with viable feet/outriggers.

hifiside

That’s a nice chunk of aluminum!

6thplanet

Wood tip at the end of the aluminum? Nice👍🏻

ugly_woofer

I did some preliminary crossover work on these today. The dip between 4k & 5k is inherent to the dome itself.

ugly_woofer

The cabinets have a coat of polyester primer and a coat of 2k. My wife wanted to learn how to shoot paint, so I let her spray the polyester after showing her how. I walked away to clean a mixing cup and came back to find that she had hung curtains, well we fixed that and she did much better with the 2k.

ugly_woofer

PWRRYD

hung curtains = runs ????

ugly_woofer

Yeah Craig, it's slang for huge runs that are like sheets of paint that are sagging. Sorry, I wasn't trying to be confusing.

PWRRYD

Makes sense.

Tom_S

Those are looking great even in the primer! I'm betting they'll sound as good as they look.

Wolf

Towers in the back- Is that a TB MTM (W4-1337/25-17XX) atop of a pair of RSS265?

I don't think we've seen those at an event....

ugly_woofer

Thanks Tom, they are actually sounding better than I had anticipated.

ugly_woofer

@Wolf said:
Towers in the back- Is that a TB MTM (W4-1337/25-17XX) atop of a pair of RSS265?

I don't think we've seen those at an event....

Ben, you got the divers spot on, the tweeters are 1742's and no they have not been to a diy event, They are not travel friendly..... almost 200 lbs each.

Wolf

I was not certain on the last 2 digits of the tweeter, but knew the sibling was the 25-1743S; and I still really enjoy those myself. Wow- 200# is seriously stout!

4thtry

Excellent. Horizontals appear very consistent. The continuous, long baffle slope looks like a very good idea. This should also help to smooth out internal cabinet resonances. Have you taken any NF port measurements yet?