to some of you, this will be porn.

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noisenyc said:


braces are made of some alder lath i had lying around, 1.5" x .5", i glued 2 pieces to each inside face with silicone II adhesive/sealer.

drivers are bolted directly to the cardboard, which is super-thick 600lb/sq inch 2 ply corrugated.

600lb/sq in cardboard? where do you find such stuff at? I make stuff out of cardboard myself.. and while i found its possible to have decent cabinets, the walls ended up being 1.25 in thick. Your stuff sounds like it would be fun to try and work with.

IMO pp driver cones were invented by someone who kept cats... paper and other materials make you afraid to squirt the cat when he puts claws in the wrong place for fear of damaging your drivers.
 
Kittle said:


600lb/sq in cardboard? where do you find such stuff at? I make stuff out of cardboard myself.. and while i found its possible to have decent cabinets, the walls ended up being 1.25 in thick. Your stuff sounds like it would be fun to try and work with.

mmm sorry kittle, seems my memory was faulty about that cardboard test strength. been a while...this was the thickest i could find at the time that was easy to source. 275lb

i reinforced top and bottom of the box with another ply...used my router and circle jig to cut the holes.

top and bottom are around 3/4" thick.

probably not news for you.

http://www.uline.com/Browse_Listing_418.asp
 
noisenyc said:


mmm sorry kittle, seems my memory was faulty about that cardboard test strength. been a while...this was the thickest i could find at the time that was easy to source. 275lb

ok now that makes more sense.

Thanks for the site link though -- now I can get cardboard in bulk w/o having to worry about food stains, or going broke buying stuff at the UPS store.

If yours sound good built like you have.. I may have some successes of my own in a while.
 
Kittle said:


ok now that makes more sense.

Thanks for the site link though -- now I can get cardboard in bulk w/o having to worry about food stains, or going broke buying stuff at the UPS store.

If yours sound good built like you have.. I may have some successes of my own in a while.

yes uline is pretty good but the outside boxes in the bundle will have cosmetic damage...cheap enough though.

all i can say is brace well, laddie, because that stuff is bendy when there's speakers bolted to it making bass. you will find box tuning to be a very approximate art hehe.

i banged 4 X RS1197's into a 20X20X4 box and mounted that right to the wall. not bad. calculated the ports so they are just holes in the box. the usual treatmetns...dammar varnish, hole in dustcap, etc.

that one i'm doing in wood soon i think. because everything sounds like what it's made of...everything.
 
Has anyone looked at honeycomb paper panels for building cabinets?

This stuff can be made extremely rigid and very lightweight. Aluminum and graphite variations are common in aircraft construction.

The stuff is often used in trade show exhibits and folding tables, for low cost, lightweight and durable constriction.

These guys seem to manufacture honeycomb planks in a wide Varity of materials:

http://www.bellcomb.com/index.htm


I’ve often wondered about using craft cell paper plank laminated both sides with luon plywood for cabinet construction. Should be cheap, rigid and non resonant.


(Dave, if we had the space, we might have more too. Yours sound lucky to be well cared fore.)

Watch out for Wolfie when he gets older. Speakers seem to create an unnatural attraction to cats to test their claws on. This often tests their human’s fondness for pets.
 

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adason said:


that one little spot looks like an accident
i suggest make a couple more of them and make it an art

still i wonder how can you have a decent bass out of a smallish fullrange with fs 53 Hz?


well sir they don't make very controlled bass due to the floppyness of the box hehe but i mean in the small rooms you gots here in nyc if you have an f3 much lower than 40hz you get seriously obnoxious boominess...


Da5id4Vz said:
Has anyone looked at honeycomb paper panels for building cabinets?

This stuff can be made extremely rigid and very lightweight. Aluminum and graphite variations are common in aircraft construction.

http://www.bellcomb.com/index.htm

Watch out for Wolfie when he gets older. Speakers seem to create an unnatural attraction to cats to test their claws on. This often tests their human’s fondness for pets.

mmm that honeycomb stuff looks kool...might make a good open baffle

wolfie so far is EXTREMELY well behaved with his scratching behavior. i bought him a nice sisal covered post as soon as i got him, and he lives for that thing! that and his cardboard laying-box i got from crapco i mean costco...and it says PJ PANTS in huge letters on it.

giving birth to yet another nickname. just in time, we were starting to call him "enema bag"
 
adason said:

a while ago technics used to make speaker cones out of it
to approach piston motion mode

i found a set in the trash in jersey. they were sonys and the drivers were square, with a passive radiator. "APM" series..." PM" meaning "pistonic motion", "A" meaning...awful?

i used 'em for a while...but as cheap consumer stuff, they were FAR from an optimal implementation...fun to look at though
 
KT said:
Blackie,

Have you ever considered that you could send your speakers through the mail without having to pack them in anything? Just slap a label on them and they're good to go!:)

Best,
KT

ahhh...thanks for that idea! i was trying to figure out how i was gonna get 'em to LA to their owner (he recently moved and left 'em with me temporarily).

or i could just drag 'em behind my scoot cross country.
 
music soothes the savage beast
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i found a set in the trash in jersey. they were sonys and the drivers were square, with a passive radiator. "APM" series..." PM" meaning "pistonic motion", "A" meaning...awful?

no wonder nobody's using that technology today

i remember long time ago friend of mine had sony mini hifi with colourfull small square-cone speakers
they sucked, just like whole sony

those technics were better though

i have been messing up with open baffles a lot and like it
 
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