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Author Topic: Loud speaker under 1 inch in diameter  (Read 632 times)
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I'm working on a fun Halloween project for which I need a very small diameter (about an inch) yet loud speaker (3 or more ohm, preferably 1 or more Watt).
Can someone recommend where can I source something like this in US?
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Lacey, Washington, USA
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http://www.mcmelectronics.com/

However, that is a rather tall order. A 1 inch speaker is either a small tweeter, or a headphone. It is difficult to put much sound out, because the smaller a speaker, the larger the excursion and the less bass you can get from it.

Are you really unable to use a speaker larger than 1 inch? Do you know that you must separate the front and back of a speaker with a baffle of some kind? Even a 300W speaker not placed in a box or baffle will not put out much sound, and will be damaged at relatively low power levels.

Here are some 2 inch diameter speakers:

2 inch 5W full range:
http://www.mcmelectronics.com/product/55-4566&green=11458509902

50mm x 90mm 15W full range:
http://www.mcmelectronics.com/product/55-4622

2.5 inch 1W full range:
http://www.mcmelectronics.com/product/55-4572

Here is a 1.4 inch 1W 8 ohm speaker, however it isn't going to be as loud as larger speakers for the same wattage input and with even less low frequency:
http://www.mcmelectronics.com/product/55-4518

Finally, here is a 1 inch 1W 8 ohm speaker. Careful, many 1 inch speakers have an impedance considerably higher than 8 ohms:
http://www.mcmelectronics.com/product/55-4514

The size of the space inside the speaker box, or the size of the baffle will affect how loud they are, and the frequency response.
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This one's a little bigger than 1", but it has really good sound.
http://www.mpja.com/4-Ohm-Mini-Speaker/productinfo/14618%20SP/
I use them in my fencing machines, here is one in a Staples pencil case:
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However, that is a rather tall order. A 1 inch speaker is either a small tweeter, or a headphone. It is difficult to put much sound out, because the smaller a speaker, the larger the excursion and the less bass you can get from it.

Are you really unable to use a speaker larger than 1 inch? Do you know that you must separate the front and back of a speaker with a baffle of some kind? Even a 300W speaker not placed in a box or baffle will not put out much sound, and will be damaged at relatively low power levels.

Here are some 2 inch diameter speakers:

2 inch 5W full range:
http://www.mcmelectronics.com/product/55-4566&green=11458509902

50mm x 90mm 15W full range:
http://www.mcmelectronics.com/product/55-4622

2.5 inch 1W full range:
http://www.mcmelectronics.com/product/55-4572

Here is a 1.4 inch 1W 8 ohm speaker, however it isn't going to be as loud as larger speakers for the same wattage input and with even less low frequency:
http://www.mcmelectronics.com/product/55-4518

Finally, here is a 1 inch 1W 8 ohm speaker. Careful, many 1 inch speakers have an impedance considerably higher than 8 ohms:
http://www.mcmelectronics.com/product/55-4514

The size of the space inside the speaker box, or the size of the baffle will affect how loud they are, and the frequency response.
Thanks! Didn't know about baffle, good info!  Yeah I can probably fit 1.5" inch but definitely not 2". It needs to fit into something like handle from large flashlight... It's a bummer about bass, I didn't think about it, bass is kind of important, but at that size I guess you can't really get sub-woofer...
That last one looks like what I need!  I'll give it a try smiley
This one's a little bigger than 1", but it has really good sound.
http://www.mpja.com/4-Ohm-Mini-Speaker/productinfo/14618%20SP/
Wow, that looks like a really great speaker for the size, I'll be definable using it for my other projects! Looks like speakers in my JBLs, those are really loud!  Thanks a lot for the link.
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The case has bunch of holes drilled in front of the speaker like a protective baffle, they weren't drilled yet when I took the picture.
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Those look great and the price is amazing. If only I could find something equivalent here in the UK.
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I've no need for a speaker at the moment, but the pencil case is a great idea. I'll be checking the local (UK) Staples next time I'm passing to see if they stock anything similar over here. Thanks for that tip.
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I have to chime in as well and talk about RESONANCE ...

it makes a WORLD of difference.  Having the speaking SECURE (tight) into/onto something... as a nice 'tube/chamber' to amplify the sound (resonance chamber) will greatly increase your volume..

as for speakers..

I have used these for many of my props/projects..

nice and loud for small hobby speaker:
http://www.thecustomsabershop.com/Premium-Speaker-P77.aspx

one with more bass..
http://www.thecustomsabershop.com/2W-Bass-Speaker-P662.aspx

they both sound good depending on the board/amp..etc.
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Lacey, Washington, USA
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I found that speakers glued onto mousse bottle tops sound surprisingly loud in a very small package.

If the flashlight is hollow (sorry, no batteries) and you seal around the edges of the speaker, that can help bass response.
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Steve Greenfield AE7HD
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I was playing with magnet wire sometime ago and placing them on the floorboards in certsin places i was able to get the whole house to become the base speaker....

But how about a low pass filter on a resonance speaker (magnet coil rolled up against object with magnet below or above providing it all made good contact.  And a 2nd high pass to feed to  tiny tweeter even a piezo?
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You might consider one of the small solid surface transducers designed to sit on a a table top or mount on a window etc... the tabletop or the window pane effectively replaces the speaker come! You can get a very big sound using a smal transducer that way. I can think of lots of good hallowe'en applications for one (or more) or those...  smiley-twist
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Tear apart a dead laptop (for the speakers) or cellphone (for the ringtone speaker.)
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Lacey, Washington, USA
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Smaller computer speakers have (obviously) rather small speakers in them.

Laptops are like Pinhead's Puzzle Box. Shudder...
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