Looks great, but what is it? I have never heard of midbasshorns before. Sorry. What are you going to cover it with? Lots of speakers out there made of cardboard, but nothing that looks like wood.
There were some pyramid shaped speakers someone made...
They are horns reproducing the frequency range from upper bass to lower mid.
In my case from 150Hz to 600Hz, with an 8 inch driver.
Further information about the original design can be found on John's pages.
135 hz Mid Bass Horn - The Paper Horn by Inlow Sound
Although my version really does have only the horn profile in common with John's design.
Not really of much relevance to your thread other than it being made from cardboard ofcourse.
Or maybe you can make a horn for your driver?
The dustcap of the driver can be seen at the beginning of the horn in the attached picture
In my case from 150Hz to 600Hz, with an 8 inch driver.
Further information about the original design can be found on John's pages.
135 hz Mid Bass Horn - The Paper Horn by Inlow Sound
Although my version really does have only the horn profile in common with John's design.
Not really of much relevance to your thread other than it being made from cardboard ofcourse.
Or maybe you can make a horn for your driver?
The dustcap of the driver can be seen at the beginning of the horn in the attached picture
Attachments
I could not figure out how the horn works: I associate a horn with the awful bullhorn hand held speaker, with its headache - inducing resonances.
Apparently this need not be so, and for a small space, maybe a folding of the horn will work.
Wikipedia explains it quite well here:
So you are creating a sort of an large speaker diaphragm made entirely out of an air column, these seem ideal for the low power amps that I am using and hope to continue using, I can even get a hand built tube amp made for about $100, so all things are considered.
Apparently this need not be so, and for a small space, maybe a folding of the horn will work.
Wikipedia explains it quite well here:
So you are creating a sort of an large speaker diaphragm made entirely out of an air column, these seem ideal for the low power amps that I am using and hope to continue using, I can even get a hand built tube amp made for about $100, so all things are considered.
Yes for low wattage power amps, horns are very useful, this is basically why they were invinted, back when watts were far between.
I am no expert but your conclusions are valid.
Horns can be designed free of annoying resonances and with the right driver can deliver low distortion dynamic sound.
They can increase the drivers coupling to the air and control directivity of the speaker
There are horns that load the front of the driver and there are those who load the rear of the driver, they are quite different, some take advantage of both.
I am no expert but your conclusions are valid.
Horns can be designed free of annoying resonances and with the right driver can deliver low distortion dynamic sound.
They can increase the drivers coupling to the air and control directivity of the speaker
There are horns that load the front of the driver and there are those who load the rear of the driver, they are quite different, some take advantage of both.
Using Cardboard boxes and chemical fumes
Anyone using cardboard boxes experience the odor that comes from these things when they are new? I obtained some the other day and I will have to let them stand for a week or so before they can be used. The chemicals seem to be irritating my throat as well.
I did some searching on the web to find the following:
Bad perfume: Cardboard’s intense scents | Science News
The older boxes I have have lost their odor completely, but have also become sort of soft.
Anyone using cardboard boxes experience the odor that comes from these things when they are new? I obtained some the other day and I will have to let them stand for a week or so before they can be used. The chemicals seem to be irritating my throat as well.
I did some searching on the web to find the following:
Bad perfume: Cardboard’s intense scents | Science News
The older boxes I have have lost their odor completely, but have also become sort of soft.
Cardboard box is not suitable
The thin walled cardboard box, while sounding fine, was simply not strong enough or stiff enough to mount the speaker without the front panel bending as shown in photo.
I will have to use a thicker corrugated cardboard box, testing the mounting of the speaker first since this is a weak point of installations so far.
The thin walled cardboard box, while sounding fine, was simply not strong enough or stiff enough to mount the speaker without the front panel bending as shown in photo.
I will have to use a thicker corrugated cardboard box, testing the mounting of the speaker first since this is a weak point of installations so far.
Attachments
While I am thinking about the enclosure here is a site with the clearest instructions I have seen on building speakers.
Speakers: Cabinets
Time to refer to my Kindle edition of Designing, Building, and Testing Your Own Speaker System with Projects 4th Edition
by David B. Weems (Author)
Speakers: Cabinets
Time to refer to my Kindle edition of Designing, Building, and Testing Your Own Speaker System with Projects 4th Edition
by David B. Weems (Author)
Some Success
I decided to go ahead and complete the speaker enclosure with the originally intended speakers, giving one last chance to adress the lack of bass and presence of distortion,
The top was not glued and sealed yet, however it was tested with my PC speaker sub watt amplifier, and although it sounded fairly clear, it was not simply loud enough.
The second test was with the Sony SS vintage system:
I post pictures of my current systems
The clarity was there, along with some distortion, and since I am into clarity of sound at the moment, this was a big plus. Bass was effected through the usual loudness switch and bass controls which I use in all my listening anyway, and resulted in quite an acceptable little speaker.
I decided to go ahead and complete the speaker enclosure with the originally intended speakers, giving one last chance to adress the lack of bass and presence of distortion,
The top was not glued and sealed yet, however it was tested with my PC speaker sub watt amplifier, and although it sounded fairly clear, it was not simply loud enough.
The second test was with the Sony SS vintage system:
I post pictures of my current systems
The clarity was there, along with some distortion, and since I am into clarity of sound at the moment, this was a big plus. Bass was effected through the usual loudness switch and bass controls which I use in all my listening anyway, and resulted in quite an acceptable little speaker.
Attachments
Latest testing showed some distortion at all levels, 60 -70 dB sound levels. I will be going for a crossover after all, common crossover frequency is 4000 Hz though I remember from earlier testing years ago I settled at a 470 uF capacitor for the best sound. This site suggests
Capacitors
C1 = 9.94 uF
Inductors
L1 = 0.16 mH
Capacitors
C1 = 9.94 uF
Inductors
L1 = 0.16 mH
In order to make a coil with the required inductance as given by this site:
Coil Inductance Calculator - Electrical Engineering & Electronics Tools
Number of turns: 35
Loop Diameter : 40 mm
Wire diameter (26 gauge): 0.254
Relative Permeability (copper) : 1
Permeability
Inductance: 0.000158H
I need about 8 meters of copper wire costing about USD 0.80
I need to strip the insulation off the ends first I had a time figuring why the copper wire was not conducting current!
Coil Inductance Calculator - Electrical Engineering & Electronics Tools
Number of turns: 35
Loop Diameter : 40 mm
Wire diameter (26 gauge): 0.254
Relative Permeability (copper) : 1
Permeability
Inductance: 0.000158H
I need about 8 meters of copper wire costing about USD 0.80
I need to strip the insulation off the ends first I had a time figuring why the copper wire was not conducting current!
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I will be adding a port. This site Car Audio - PORT Size Calculations and Formulas for WOOFER and Subwoofer BOXES gives a port length for a 2 inch wide port to be 3.91 inches for a 77 Hz resonance. Box volume is estimated at 0.266 cubic feet.
77 Hz should land it in the bass and drum range.
77 Hz should land it in the bass and drum range.
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Some listening last night to digital streaming audio (Yonder.com) revealed the speakers were sounding quite pleasant with good quality audio. I really enjoyed "Beneath the Mask" , the clarity was there, possibly due to the crossoverless, full range set up with a port.
Time to complete the other speaker and finish the thing.
Next time I start with an adequate setup for bass.
I leave you with some links to images of cardboard speakers others have built.
Monitor speakers by Mitch Shivers at Coroflot.com
YouTube
YouTube
http://charlest.zenfolio.com/img/v1/p572989259-4.jpg
https://www.juanmatoscapote.net/
http://audiokarma.org/forums/index.php?threads/wanting-to-dable-in-full-range-speakers.563852/page-2
https://randomoverload.org/cardboard-speakers
Time to complete the other speaker and finish the thing.
Next time I start with an adequate setup for bass.
I leave you with some links to images of cardboard speakers others have built.
Monitor speakers by Mitch Shivers at Coroflot.com
YouTube
YouTube
http://charlest.zenfolio.com/img/v1/p572989259-4.jpg
https://www.juanmatoscapote.net/
http://audiokarma.org/forums/index.php?threads/wanting-to-dable-in-full-range-speakers.563852/page-2
https://randomoverload.org/cardboard-speakers
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Completed
The speaker has been completed, painted with black paint on the front panel, and covered with black paper on the sides. Ordinary poster color like paint was used.
It sounds good sometimes, sometimes distorted, which has to do with the speaker wires and tiny USB amplifier. All in all, I have had some very good listening sessions and have heard musical sounds never heard before on tracks I have heard before.
Completing the other side.
The speaker has been completed, painted with black paint on the front panel, and covered with black paper on the sides. Ordinary poster color like paint was used.
It sounds good sometimes, sometimes distorted, which has to do with the speaker wires and tiny USB amplifier. All in all, I have had some very good listening sessions and have heard musical sounds never heard before on tracks I have heard before.
Completing the other side.
Attachments
How do they sound? With streaming audio from a subscription service, (Yonder, iTunes, Wynk..) they sound good. On the Linkwitz scale:
I had a great listening session yesterday, very enjoyable, especially light rock.
I had a great listening session yesterday, very enjoyable, especially light rock.
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One problem with these speakers, not a problem with the speakers themselves actually, is that different recordings require different tone settings to play back with the correct tonal balance, and tone controls I do not have. For example Peter Gabriel's "SO" comes across nicely but Sade's "Promise" (both CDs) even though it is a CD, sounds a little more subdued.
One option then is to make the speakers a little bright to compensate for the varied recordings and to use tone controls.
The other option is to go two-way: testing with a tweeter showed much better reproduction of highs, needs toning down a bit, but two way seems the way to go, at least at my budget levels.
One option then is to make the speakers a little bright to compensate for the varied recordings and to use tone controls.
The other option is to go two-way: testing with a tweeter showed much better reproduction of highs, needs toning down a bit, but two way seems the way to go, at least at my budget levels.
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