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Old 17th May 2014, 05:24 AM   #1
xrk971 is online now xrk971  United States
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Default The Quick, Cheap and Dirty Speaker Challenge

Over in the Cornu and Foamcore threads, I was throwing around an idea to build speakers with nothing but materials obtainable from a dollar store, some members suggested that it would be better to have a challenge where the restriction would be that speaker be built from low cost alternative materials whether purchased or repurposed from dumpsters, etc. There needs to be some limitations: total cost of each speaker in materials is $20 or less, no power tools except for a hot melt glue gun, it needs to be buildable on a typical kitchen table or living room floor (no shop), it must be buildable in one evening not including glue drying time, and it should use materials not ordinarily thought of as speaker enclosure materials (no plywood, no MDF, no solid wood boards - you would need power tools to cut those anyway).

Other than these restrictions, one is free to be creative and think out of the box to produce a good sounding speaker. If you are lucky enough to find expensive drivers in the trash then good for you - it doesn't count against the $20 limit. If you want to buy a new driver then it counts against the limit. So you see some luck is involved here if one finds a pair of RS 40-1354's in the trash.

Examples of materials to use include: construction site discards of ceiling tile, Pergo floorboards, fiberglass, OSB, old kitchen cabinets, cardboard, PVC piping, etc.

I hope folks think of this as a way to free yourself from the traditional rectangular prism box. Go wild! Please post pics and sound clips if possible.

Good luck!

If you feel that the rules need to be amended let me know.

I know some of you are asking why the no power tools and no shop restriction? Think of this as an exercise in McGyverism.

Edit (May 12, 2014): Soldering irons are allowed; plywood or chipboard is allowed if 1/4 inch thick or under and IFF you cut it by hand; One evening is equivalent to 8 hrs total time and can be done over multiple actual "evenings" or during the day - we are not vampires here ; old drivers you bought over 5 years ago that are collecting dust are allowed (someone is going to have a Fostex FX200 that they took out - just watch out for guys like this ).

Last edited by xrk971; 17th May 2014 at 11:55 AM.
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Old 17th May 2014, 05:41 AM   #2
xrk971 is online now xrk971  United States
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Default Cardboard open baffle

I submit my cardboard OB as an entry - details in this thread: Cheap and FAST OB, Literally

Click the image to open in full size.

Click the image to open in full size.

Cost $10 (TC9FD) + $5 (6.5 in woofer) + $5 (two sets of binding posts) = $20.

Listen to it here: http://www.diyaudio.com/forums/attac...ob-clip-03.zip
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Old 17th May 2014, 06:42 AM   #3
freddi is offline freddi  United States
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here's an old one - maybe it'll inspire paper mache work for this contest - it would have measured better with some damping - the driver was a MCM 5 "monitor" - its eyes were the vent. oops - its not quick ...

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Last edited by freddi; 17th May 2014 at 06:44 AM.
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Old 17th May 2014, 06:55 AM   #4
CLS is offline CLS  Taiwan
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Hey, done something similar

Even Cheaper and Faster OB Trial

Oops, didn't count the cost. Old unused drivers & free carboard anyway

Last edited by CLS; 17th May 2014 at 07:02 AM.
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Old 17th May 2014, 07:27 AM   #5
freddi is offline freddi  United States
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almost finished other than never being able to find bolts - I'm sure this will measure poor but sound very good - $10.50 for the speaker - just sitting up without a baffle, it sounded excellent on a variety of Youtube videos including slapped bass and classical cello - the real shame comes when something like this sounds better than an effort involving money, materials and time -lol - in other words the cheap effort with enjoyable music may be good enough to convey whats important.

Boss 6x9 poly speaker

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Click the image to open in full size.
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Old 17th May 2014, 09:08 AM   #6
freddi is offline freddi  United States
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didn't sound right on Satie piano - I first tried to de-Q the baffle and wings with holes poked in a lot of places - finally, an added chamber helped the presentation

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Old 17th May 2014, 11:09 AM   #7
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no plywood well that scraps some of my entries as a few where made with thin plywood or paneling (hand cut)
and i guess it leaves out all the found boxes that are re loaded with components unless the "box"is non traditonal perhaps...
sidebar question does a soldering iron represent a "power" tool?
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Old 17th May 2014, 11:43 AM   #8
xrk971 is online now xrk971  United States
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Nice submissions there Freddi. That mask entry so far takes the cake but just is plain scary to look at. How long did it take you to make? I never thought of paper mâché before. It opens up a lot of rounded smooth speakers and even waveguides and horns! What did you use to form the shape prior to laying the wet newspapers on top? Chicken coop wire screen?
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Old 17th May 2014, 11:47 AM   #9
xrk971 is online now xrk971  United States
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Quote:
Originally Posted by CLS View Post
Hey, done something similar

Even Cheaper and Faster OB Trial

Oops, didn't count the cost. Old unused drivers & free carboard anyway
Nice OB's there CLS. Maybe I can allow old used drivers if you have had them longer than 5 years and were just collecting dust otherwise.
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Old 17th May 2014, 06:27 PM   #10
freddi is offline freddi  United States
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years ago = that head took too long - a couple of days and one trip to the oven - may have used a balloon but something went flat so the result looks like a ham. The hair from my head never aged like the hair on my head. Blue came from printer ink mixed with damar, a melted candle for mouth

that rough K-slot chamber mess is an improvement over the bare open baffle so give that a try.

Click the image to open in full size.

Last edited by freddi; 17th May 2014 at 06:29 PM.
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