The Uluwatu - another new Curt C design?!

[BBLV]

Re: The Uluwatu - another new Curt C design?!

Looking at these for a HT LRC build. You mention on your site to move one of the woofers to above the MTM for a center. Is there anyway to shorten the brace and potentially place the port facing down for the center? I'm effectively trying to make it symmetrical by shortening the box and relocating the port. Will those completely screw with the voicing and timbre of this set?

FYI this will be used for 40% HT, 40% general TV & 20% music. I built your Statement center a few years back and loved it, but like this for its relative simplicity.

[kiteflyer]

Re: The Uluwatu - another new Curt C design?!

Looking at these for a HT LRC build. You mention on your site to move one of the woofers to above the MTM for a center. Is there anyway to shorten the brace and potentially place the port facing down for the center? I'm effectively trying to make it symmetrical by shortening the box and relocating the port. Will those completely screw with the voicing and timbre of this set?

FYI this will be used for 40% HT, 40% general TV & 20% music. I built your Statement center a few years back and loved it, but like this for its relative simplicity.

Did you ever find out if that would work?

[BBLV]

Re: The Uluwatu - another new Curt C design?!

Did you ever find out if that would work?

Nope. Decided to go with an LRC set of the Statement II's instead..

[curt_c]

Re: The Uluwatu - another new Curt C design?!

Did you ever find out if that would work?

The Uluwatu is a MLTL, so the port position on the line is pretty important. I'm not sure how the bass would respond if you moved the port location and made it a vented design.

C

[sugercube]

Re: The Uluwatu - another new Curt C design?!

Hello, this is my first port. I have built a pair of Uluwatus and they are sounding a bit harsh and lacking bass. I mos probably have wiring issues and would appriciate any assistance with correcting it. Please have a look a the crude (but accurate) wiring of crossover and drivers.

I did try to check the measurements of the individual components on the crossover network with an LCR meter without connecting the drivers and found some weird results. I tried to measure the 6.8 uF cap and the 5.6 uF cap and they both measured at around 12.2 to 12.3 uF which is the combined capacitance of them if they were being connected in parallel. The thing is, they are connecting in parallel (the tweeter and the woofer network) but without the drivers connected the circuit should be open and should not produce weird results unless there is a loop. I removed one link and (highlighted in orange) and the individual components measure OK after that. I guess one way I could check if i went wrong is to compare the DC resistance of (completed crossover with drivers plugged in) your crossover against what I measured.

P.S. I sent Curt an email/essay regarding the issue already

[ggetzoff]

Re: The Uluwatu - another new Curt C design?!

I just ordered 18 of these drivers to do the Uluwatu as L-C-R :D They'll be BB with Makore veneer, and a black satin front baffle. I'll keep everyone posted but I wont start until later this year (building a house right now).

[ggetzoff]

Re: The Uluwatu - another new Curt C design?!

Yes, it needs a rim for the port as well as being pocketed on the back side of the front for the sides to meet. And of course I need to toolpath the other panels. Call me cheap, but I think I'll just use the 4 inch pvc pipe as a port and the vifa BC25SC06-04 tweeter which I already have...

Note the crossover schematic. Are the two resistors I have circled simply typos as they don't seem to be represented anywhere?

Did you ever get your drawings to a tool path?

[Exarch]

Re: The Uluwatu - another new Curt C design?!

Even though I still haven't finished my Speedster TMM's that I bought the parts for almost two years ago, I just ordered all the drivers from Solen for the Uluwatu, due to both the tweeter and woofers being greatly discounted there. I urge any Canadians to check them out if they are looking for these or other SB drivers.

I'm sure when I get to attempting to recess the pincushion frame twelve times, I will regret this.

[kenny_k]

Re: The Uluwatu - another new Curt C design?!

And you will have a big grin when your sitting and listening.

[djkest]

Re: The Uluwatu - another new Curt C design?!

Hello, this is my first port. I have built a pair of Uluwatus and they are sounding a bit harsh and lacking bass. I mos probably have wiring issues and would appriciate any assistance with correcting it. Please have a look a the crude (but accurate) wiring of crossover and drivers.

Did you get this figured out yet?

[knowledgebass]

Re: The Uluwatu - another new Curt C design?!

I just ordered all the drivers from Solen for the Uluwatu, due to both the tweeter and woofers being greatly discounted there. I urge any Canadians to check them out if they are looking for these or other SB drivers.

Knock another 20% off at Solen for your American dollar. So tempting although I have no place for them...

[mason_wy]

Good day, does anyone have a CNC files for the Uluwatu build?

I just ordered my speakers and cross over and am excited to get started. Hoping someone has a file on this forum, id like to build on all your experience and hard work.

[drumcircle]

Can anyone help me understand the acoustic costs/benefits of flush mounting these woofers? Regardless, how would it actually be done with a router?

[billfitzmaurice]

Flush mounting woofers has little to no effect on their response, as the frame is too thin compared to the wavelengths being radiated to create diffraction or boundary reflection issues. It may have some affect on the tweeter output. You use a jig to rout the recesses, there are on-line videos that show how it's done.

[Geoff Millar]

Don Radick on this Forum built his "Galleon" MTMs with this driver and made a router jig from poly-carbonate or similar to enable flush mounting:

http://techtalk.parts-express.com/forum/speaker-project-gallery/57057-galeons-sb13-mtm

I've worked with the SB16pfc (same frame shape) and gave up trying to flush mount them! They still sounded fine.

The new versions of the SB13 have a round frame, anyway, the weird shape has been discontinued. The old ones must have been inspired by the Austin Allegro, an awful 1970s British car with a "quartic" steering wheel, exactly the same shape.

Geoff

[djg]

https://www.avsforum.com/threads/curved-uluwatu-build.2673585/