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4pi flat pack, Rhino Line [message #92257] Sun, 06 September 2020 13:59 Go to next message
rage889 is currently offline  rage889
Messages: 3
Registered: September 2020
Esquire
Hi Wayne,

I just competed the assembly of my flat packs. The quality is great and the front baffle is very impressive.

I want to have them sprayed at a local Rhinoliner. Do you think I need to prime them first or can I just have it shot straight on to the MDF?

I *believe* it is a two part polyurethane.

I will post pictures when complete!

Sean Richardson
Re: 4pi flat pack, Rhino Line [message #92258 is a reply to message #92257] Sun, 06 September 2020 14:06 Go to previous messageGo to next message
compaddict is currently offline  compaddict
Messages: 77
Registered: April 2014
Location: Auburn, CA USA
Viscount
I did mine with automotive primer and finished with automotive semi-gloss black.
Turned out very nice!
Re: 4pi flat pack, Rhino Line [message #92265 is a reply to message #92258] Mon, 07 September 2020 12:31 Go to previous messageGo to next message
Wayne Parham is currently offline  Wayne Parham
Messages: 17873
Registered: January 2001
Illuminati (33rd Degree)

That's been my experience too. I'm really the guy to ask about electronics and acoustics, but not so much on cabinetry and finishes. I tend to leave the woodworking and finish-coating answers to those more familiar. There are some really good cabinetmakers here.

That said, I have done a lot of speakers with various truck bed liner finishes and they apply great right onto MDF or Baltic Birch, without any special preparation. Some paints really need adhesion modifiers and/or primers applied, but truck bed liner seems to be an exception. It bonds to wood just great. And its texture tends to cover rough spots in the wood and also to hide joints, so you don't have to work as hard in the sanding department either.
Re: 4pi flat pack, Rhino Line [message #92283 is a reply to message #92257] Wed, 09 September 2020 13:43 Go to previous messageGo to next message
jtwrace is currently offline  jtwrace
Messages: 45
Registered: October 2009
Location: FL
Baron
If you would like to save some money you can DIY them using Duratex.

https://www.acrytech.com/product-category/speaker-cabinet-coatings/

It's very simple to use and will provide a very durable great looking minimal finish.
Re: 4pi flat pack, Rhino Line [message #92284 is a reply to message #92257] Wed, 09 September 2020 13:47 Go to previous messageGo to next message
jtwrace is currently offline  jtwrace
Messages: 45
Registered: October 2009
Location: FL
Baron
/forum/index.php?t=getfile&id=2616&private=0
Starting Assembly
Re: 4pi flat pack, Rhino Line [message #92285 is a reply to message #92257] Wed, 09 September 2020 13:48 Go to previous messageGo to next message
jtwrace is currently offline  jtwrace
Messages: 45
Registered: October 2009
Location: FL
Baron
Another
/forum/index.php?t=getfile&id=2617&private=0
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Re: 4pi flat pack, Rhino Line [message #92286 is a reply to message #92257] Wed, 09 September 2020 13:49 Go to previous messageGo to next message
jtwrace is currently offline  jtwrace
Messages: 45
Registered: October 2009
Location: FL
Baron
Had to install the Neutrik connector. Thanks to TomS for the suggestion of the 2" Forstner bit.

/forum/index.php?t=getfile&id=2618&private=0
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Re: 4pi flat pack, Rhino Line [message #92287 is a reply to message #92257] Wed, 09 September 2020 13:49 Go to previous messageGo to next message
jtwrace is currently offline  jtwrace
Messages: 45
Registered: October 2009
Location: FL
Baron
Next was some sanding. I chose to use an orbital sander with 80 grit to knock the overhang of the baffle off and really get the MDF smooth. As my previous painting training has taught me the prep work is the dirtiest and certainly the most important for the final finish. I used BIN Primer that I had tinted as a white base with black Duratex going over didn't make any sense to me. I did one coat of BIN then sanded with 120 grit and repeated.

/forum/index.php?t=getfile&id=2619&private=0
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Re: 4pi flat pack, Rhino Line [message #92288 is a reply to message #92257] Wed, 09 September 2020 13:50 Go to previous messageGo to next message
jtwrace is currently offline  jtwrace
Messages: 45
Registered: October 2009
Location: FL
Baron
I like to finish the inside. If it was ever sold and someone opened it, I like it to look finished. Also, it really cuts down on the possible MDF dust and just makes it so much nicer to me. How crappy is it to open a speaker and see it raw and cheesy inside? Yuck. Doesn't take much more effort to make it look a bit nicer and an advantage of diy since you're not against the Excel Sheet of the bottom line.

/forum/index.php?t=getfile&id=2620&private=0
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Re: 4pi flat pack, Rhino Line [message #92289 is a reply to message #92257] Wed, 09 September 2020 13:51 Go to previous messageGo to previous message
jtwrace is currently offline  jtwrace
Messages: 45
Registered: October 2009
Location: FL
Baron
2-3 coats of Duratex provides an excellent finish. I have found that while you put it on heavy, it really takes rolling it in all directions to smooth it out evenly. Then for the final finish, you slowly roll one direction with no pressure with 50% overlap. No zebra stripes and a consistent texture.

/forum/index.php?t=getfile&id=2622&private=0

/forum/index.php?t=getfile&id=2623&private=0
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