Corrugate speakers...aka cardboard

Wardsweb · 10th March 2011, 03:52 AM

Here are some budget project speakers I built this week. The pyramid speakers are made from 500 pound test triple wall corrugate (aka cardboard). I fitted them with Vifa A10CC-07 (made for M&K and $5 from deepsurplus.com) two way drivers and Eminence Alpha 8 ($45 from Parts Express) woofers. Simple 3-way crossovers from Parts Express and it is amazing how good they sound.

dhieber · 10th March 2011, 04:20 AM

A very innovative build. Some questions. How did you join the edges of the cardboard? Is the woofer box closed or ported? What are the crossover frequencies and slopes? Thanks.

Wardsweb · 10th March 2011, 11:58 AM

Quote:

Originally Posted by dhieber

A very innovative build. Some questions. How did you join the edges of the cardboard? Is the woofer box closed or ported? What are the crossover frequencies and slopes? Thanks.

They are hot glued but on a industrial level

There are no ports and they are not totally sealed at this point. The bottoms are open. Whatever they are sitting on acts like the bottom of the speaker. On carpet a bit of air flow, more like polyfill, but I don't see much difference in sound. They still have nice bass for such a small woofer.

Crossover frequencies of 800 Hz and 5,000 Hz with 12 dB per octave roll-off.

Wardsweb · 10th March 2011, 02:30 PM

A picture to show what triple wall is.

Arty · 10th March 2011, 06:23 PM

Wardsweb, do you have some kind of mind reading ability?
You have just answered my question before i was able to post it, lol.

Thank you for the info.

speakerdoctor · 10th March 2011, 07:36 PM

Okay, now we need to see some box resonance tests....

PeteMcK · 11th March 2011, 12:07 AM

Nice work, I've got a heap of heavy double wall available for free, must try it soon...

TerryO · 11th March 2011, 12:27 AM

I think, based on a bit of experience, that cardboard is a wonderful material to use with speakers. Just to state my position, I'm in the "Pulp is Pulp" camp, although I certainly believe that different glues, adhesive materials or finish can affect the sound.

Best Regards,
TerryO

planet10 · 11th March 2011, 01:46 AM

I've built more than a few cardboard boxes.

After building my last pair of cardboard speakers (Mets with a set of TB unobtainium 3"), i realized that Chris could have thrown a pair of plywood boxes in half the time it took me.

dave

Wardsweb · 11th March 2011, 02:41 AM

I have the advantage of working at a corrugators. I built the boxes in about 20 minutes in our design room. Any job is easier when you have all the correct tools at hand. Add another 30 for cutting the holes, adding drivers and crossovers. So in round numbers, it took about an hour.

10th March 2011, 03:52 AM	#1
Wardsweb diyAudio Member Join Date: Feb 2003 Location: San Antonio, Texas	Corrugate speakers...aka cardboard Here are some budget project speakers I built this week. The pyramid speakers are made from 500 pound test triple wall corrugate (aka cardboard). I fitted them with Vifa A10CC-07 (made for M&K and $5 from deepsurplus.com) two way drivers and Eminence Alpha 8 ($45 from Parts Express) woofers. Simple 3-way crossovers from Parts Express and it is amazing how good they sound.

11th March 2011, 12:07 AM	#7
PeteMcK diyAudio Member Join Date: Feb 2002 Location: Sydney	Nice work, I've got a heap of heavy double wall available for free, must try it soon... __________________ ‘today… there lives alongside the twentieth century the tenth or thirteenth. A hundred million people use electricity and still believe in the magic power of signs and exorcisms” Trotsky

11th March 2011, 12:27 AM	#8
TerryO diyAudio Member Join Date: Nov 2002 Location: Seattle,Wash.	I think, based on a bit of experience, that cardboard is a wonderful material to use with speakers. Just to state my position, I'm in the "Pulp is Pulp" camp, although I certainly believe that different glues, adhesive materials or finish can affect the sound. Best Regards, TerryO __________________ "If you have to ask why, then you're probably on the right track." quote from Terry Olson's DIYaudio Forum application

11th March 2011, 01:46 AM	#9
planet10 frugal-phile(tm) diyAudio Moderator Join Date: Oct 2001 Location: Victoria, BC, NA, Sol III Blog Entries: 4	I've built more than a few cardboard boxes. After building my last pair of cardboard speakers (Mets with a set of TB unobtainium 3"), i realized that Chris could have thrown a pair of plywood boxes in half the time it took me. dave __________________ community sites t-linespeakers.org, frugal-horn.com ........ commercial site planet10-HiFi p10-hifi forum here at diyA

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10th March 2011, 04:20 AM	#2
dhieber diyAudio Member Join Date: Sep 2004 Location: Illinois	A very innovative build. Some questions. How did you join the edges of the cardboard? Is the woofer box closed or ported? What are the crossover frequencies and slopes? Thanks.

10th March 2011, 02:30 PM	#4
Wardsweb diyAudio Member Join Date: Feb 2003 Location: San Antonio, Texas	A picture to show what triple wall is.

10th March 2011, 06:23 PM	#5
Arty diyAudio Member Join Date: Feb 2011	Wardsweb, do you have some kind of mind reading ability? You have just answered my question before i was able to post it, lol. Thank you for the info.

10th March 2011, 07:36 PM	#6
speakerdoctor diyAudio Member Join Date: Sep 2006 Location: New England	Okay, now we need to see some box resonance tests....

11th March 2011, 02:41 AM	#10
Wardsweb diyAudio Member Join Date: Feb 2003 Location: San Antonio, Texas	I have the advantage of working at a corrugators. I built the boxes in about 20 minutes in our design room. Any job is easier when you have all the correct tools at hand. Add another 30 for cutting the holes, adding drivers and crossovers. So in round numbers, it took about an hour.

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