new project in works. PaperStone BBMTMBB

[r-carpenter]

3.5 way loudspeaker for a friend. He's actually building it and I am doing crossover and tuning.
Driver compliment.
4 Dayton RS150s-8 per side
2 Dayton RS52 per side
Fountek 3.0
Case work.
Front panel: 1.25 Paper Stone
Sides 1" MDF, possibly CLD but not decided yet. Multiple bracing is a must.
Side panels will probably have Walnut veneer. My friend has a WOW bundle of Walnut with bird's eye/burl graining.

[kmibb]

Re: new project in works. PaperStone BBMTMBB

Will the RS150 not cross well with the Fountek? Just seems like it's a small driver to need to use a dome mid with. Also what's the simulated F3 with an RS150 that's used as a woofer?

Kevin

[r-carpenter]

Re: new project in works. PaperStone BBMTMBB

F3 is 46hz for RS150
RS150 will not cross at all directly to Fountek.
3.0 has energy storage issues at 2.2 khz and high distortions. Respectively RS150 has highish distortions in this area as well and a large cone brake up higher with all artifacts. The idea here is to have very linear FR, low distortions through every driver passband and excellent off axis response.

[Pete Schumacher]

Re: new project in works. PaperStone BBMTMBB

Will the RS150 not cross well with the Fountek? Just seems like it's a small driver to need to use a dome mid with. Also what's the simulated F3 with an RS150 that's used as a woofer?

Kevin

The Fountek likes to cross higher up than the RS150 is really wanting to go. The RS52 will make a nice bridge to fill the gap.

[dwigle]

Re: new project in works. PaperStone BBMTMBB

What is paper stone?

[r-carpenter]

Re: new project in works. PaperStone BBMTMBB

http://www.paperstoneproducts.com/

heavy as hell. non resonant. physically it's layered paper impregnated with phenolic resign. hard to machine but not impossible with carbide tools.

[Wolf]

Re: new project in works. PaperStone BBMTMBB

http://www.paperstoneproducts.com/
heavy as hell. non resonant. physically it's layered paper impregnated with phenolic resign. hard to machine but not impossible with carbide tools.

Just my 2c, but if he's going to all that trouble with the baffle, I would use a better mid.
Later,
Wolf

[Pete00t]

Re: new project in works. PaperStone BBMTMBB

Did you also consider soap stone in your choice of materials? Before choosing paper stone?

[charlielaub]

Re: new project in works. PaperStone BBMTMBB

I would definitely check to see if you can route a clean edge in to the Paperstone material before dropping any $$$ on it. Some of these counter top type high-recycled-content materials don't cut cleanly. If you were planning to flush-mount your drivers, this could be an issue.

-Charlie

[r-carpenter]

Re: new project in works. PaperStone BBMTMBB

Machining paper Stone is tough but we already made countertops out of it. All the materials including drivers are leftovers from the job. I did a commercial sound system for a restaurant and my friend did fabrications in paperstone. I've helped to unload a 700 pound panel for fabrication so :D I know whats involved.
It's not for faint hearted and good dust collection is a must. Phenolic dust is a pure poison. Materials are free at this point. The only thing I paid for were Founteks. I'd never dreamed of just buying paperstone for a speaker project. 1.25 5x10 panel was around $2000.

Soap stone, not sure how to work it. Paperstone cuts clean with carbide.

Wofl, common man, rs52 is a great midrange if used in it's passband. Especially a pair with less excursion required. :rolleyes:

[donparsons]

Re: new project in works. PaperStone BBMTMBB

I was looking into soapstone for a project at one point. The claim is you can work it with woodworking tools.

Could be interesting for someone with your talents.

Machining paper Stone is tough but we already made countertops out of it. All the materials including drivers are leftovers from the job. I did a commercial sound system for a restaurant and my friend did fabrications in paperstone. I've helped to unload a 700 pound panel for fabrication so :D I know whats involved.
It's not for faint hearted and good dust collection is a must. Phenolic dust is a pure poison. Materials are free at this point. The only thing I paid for were Founteks. I'd never dreamed of just buying paperstone for a speaker project. 1.25 5x10 panel was around $2000.

Soap stone, not sure how to work it. Paperstone cuts clean with carbide.

Wofl, common man, rs52 is a great midrange if used in it's passband. Especially a pair with less extrusion required. :rolleyes:

[Wolf]

Re: new project in works. PaperStone BBMTMBB

Wofl, common man, rs52 is a great midrange if used in it's passband. Especially a pair with less excursion required. :rolleyes:

Never heard a pair in the same speaker, but I've never heard an RS52 I liked either.
Later,
Wolf

[r-carpenter]

Re: new project in works. PaperStone BBMTMBB

work started

[r-carpenter]

Re: new project in works. PaperStone BBMTMBB

Mark is cutting Paper Stone on the table saw. Lots of [email protected]@@
Clean cut though.

[r-carpenter]

Re: new project in works. PaperStone BBMTMBB

I have also decided to add rear mounted horizontal ribbon with level adjustment. Wanted to experiment with that for a long time.