Pretty Persuasions - InDIY Coax Build Thread

[Millstonemike]

Javad,

On the method for cutting the baffle to fit an odd shaped driver ...

Could you do it with one sacrificial template by starting with 1/2" bit for the template. Then switch to a 1/4" bit for the final cut?

[Derekj]

Good idea with the fishing line and template tape!

[JavadS]

Javad, what kind of finish will these have?

Likely Minwax Natural stain (basically oil) and sprayed spar varnish.

[carlthess40]

Now IÂ’m kicking myself for having to sell off my wood working shop when we moved into this condo. Great job. I used to make my kerf cuts with my router table setup that I had made on the end of my 1970Â’s sears table saw. That way I was able to get the cuts into an angel for the bend. Your skills are top of the line. Will you be marking and selling these?

[marvin]

What kind of router bit would you use to make kerf cuts?

[KEtheredge87]

... Test cuts finalizing OD, ID and recesses

Hey Javad, Love the documentation for the irregular shape flush mount router work! Making test cuts to dial everything in is certainly smart. I was wondering if or how you account for some gasket tape behind each driver? Some drivers come with a thin foam gasket supplied, but I prefer the PE speaker gasket tape. I'd like to get a consistently flush install, but I'm never sure how much extra depth to include for the gasket tape. Do you have experience or thoughts you'd share?

Thanks!
Keith

[Navy Guy]

Those pincushion frames always make me wince. I wish manufacturers would just offer round for everything I need to get a few more router bits so I can try doing this at some point.

[JavadS]

Hey Javad, Love the documentation for the irregular shape flush mount router work! Making test cuts to dial everything in is certainly smart. I was wondering if or how you account for some gasket tape behind each driver? Some drivers come with a thin foam gasket supplied, but I prefer the PE speaker gasket tape. I'd like to get a consistently flush install, but I'm never sure how much extra depth to include for the gasket tape. Do you have experience or thoughts you'd share? Thanks! Keith

[JavadS]

Now I’m kicking myself for having to sell off my wood working shop when we moved into this condo. Great job. I used to make my kerf cuts with my router table setup that I had made on the end of my 1970’s sears table saw. That way I was able to get the cuts into an angel for the bend. Your skills are top of the line. Will you be marking and selling these?

[Paul K.]

If you're interested, I allow an extra 1/64" added to the flange's thickness if the driver comes with its own thin foam gasket. If the driver doesn't come with its own gasket, I use PE's speaker gasket foam tape and add 1/32" to the driver's flange thickness. If I screw up on either and cut the flange recess significantly too deep, I simply add a layer of PE's gasket tape to either type of driver gasket to raise the driver up. I don't fret over a driver's flange being a smidgen above or below a baffle, however, as the acoustical ramifications will not be audible.
Paul

Hey Javad, Love the documentation for the irregular shape flush mount router work! Making test cuts to dial everything in is certainly smart. I was wondering if or how you account for some gasket tape behind each driver? Some drivers come with a thin foam gasket supplied, but I prefer the PE speaker gasket tape. I'd like to get a consistently flush install, but I'm never sure how much extra depth to include for the gasket tape. Do you have experience or thoughts you'd share?

Thanks!
Keith

[joeybutts]

This is why build threads are awesome; definitely using that template technique down the road.

Beautiful work as always, and mad jelly about your space and equipment.

This makes me want to start a serious build soon.....

[JavadS]

Ok time for some ports! Here is where they stood before



First step punch some pilot holes through the center of the back


Now drill with 1.5"” bit




The ports get installed from behind and clamped in place, ready for a 1/2” spiral cut flush bit. They’re a tight fit but if they fell out it would be disasters







Ready for a roundover


I used 3/4” as port velocity wont be an issue on these and it gives some room to the relatively tight fit





Time for some port tuning with WT2, 8” driver installed and open back sealed against the moving blanket



Ports with inner supports and flares installed, driver connected



First sweep with approx 9” long ports, Fm of 32hz



This is the model I’m targeting, about 38hz



1.5”" removed



Another sweep, now Fm 35hz



1” more off, and right at 37Hz, I’m good with that



Next clamping on and locating the back!

Javad

[JavadS]

I’ve made...

[scottvalentin]

Here's a circle cutting question Javad:
I just got the Bosch 1617 plunge router for Christmas, and I noticed that the base is fairly large. How do you go about cutting out smaller circles where the guide pin for the jig would end up under the router base? For instance, the SB19 tweeter rebate that I need to do next is a 44mm radius, this will put the guide pin under the black base. My circle guide is a piece of acrylic that I screw to the bottom. Then I measure from the outside of the cutting bit to circle's centre (44mm) and drill a hole in the acrylic. Like a Jasper jig, but a fair bit cheaper!

[JavadS]

Here's a circle cutting question Javad: I just got the Bosch 1617 plunge router for Christmas, and I noticed that the base is fairly large. How do you go about cutting out smaller circles where the guide pin for the jig would end up under the router base? For instance, the SB19 tweeter rebate that I need to do next is a 44mm radius, this will put the guide pin under the black base. My circle guide is a piece of acrylic that I screw to the bottom. Then I measure from the outside of the cutting bit to circle's centre (44mm) and drill a hole in the acrylic. Like a Jasper jig, but a fair bit cheaper!