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maemo.org - Talk (https://talk.maemo.org/index.php)
-   Multimedia (https://talk.maemo.org/forumdisplay.php?f=32)
-   -   DIY Audio thread, show you DIY audio 'equipment' (Amps, BT etc...) (https://talk.maemo.org/showthread.php?t=74341)

sixwheeledbeast 2012-10-29 12:02
Re: DIY Audio thread, show you DIY audio 'equipment' (Amps, BT etc...)
 
Quote:
Originally Posted by Addison (Post 1286938)
No batteries required
Passive, so it's never going to be louder.
You need something active, batteries or mains fed.

Addison 2012-10-29 12:03
Re: DIY Audio thread, show you DIY audio 'equipment' (Amps, BT etc...)
 
Okay. Thanks.

I didn't know that.

electroaudio 2012-10-29 12:22
Re: DIY Audio thread, show you DIY audio 'equipment' (Amps, BT etc...)
 
Quote:
Originally Posted by sixwheeledbeast (Post 1287036)
Passive, so it's never going to be louder.
Homespeakers have a sensitivity that are less than 0.1 percent, smaller speakers usually a couple of magnitudes lower.
So there is plenty to be gained from an efficient speakerconstruction.

Estel 2012-10-29 19:33
Re: DIY Audio thread, show you DIY audio 'equipment' (Amps, BT etc...)
 
Quote:
Originally Posted by Addison (Post 1286938)
Frequency Response: 200Hz - 12KHz
Pretty awkard frequency response - enough for telephone (landline)-like quality of sound, but not much else. You should aim for >= 20 KHz upper frequency response, for quality music reproduction.

Sure, manufacturers tend to lie about upper limit, so true 20 KHz reproduction is rarity - but, it's at least something around, and frankly, frequencies around 20 KHz hardly matters, unless you're preparing sound system for your cat/dog. But, if producer actually *states* only 1w KHz response, you maybe sure, that it's else this or lower, no chances for better.

/Estel

electroaudio 2012-10-29 20:49
Re: DIY Audio thread, show you DIY audio 'equipment' (Amps, BT etc...)
 
1 Attachment(s)
Not so useful for a N900, but still... here are my homemade speakers ;)

Win7Mac 2012-10-29 23:49
Re: DIY Audio thread, show you DIY audio 'equipment' (Amps, BT etc...)
 
Guess I was looking for something like this:
http://www.musicman.eu/images/storie...tter_klein.jpg
Claims to have 2x 3 Watt and 150 – 18000 Hz (±3 dB) and has good reviews.
Haven't heard it, but looks not too bad for less than 23 Euros?

Estel 2012-10-30 00:03
Re: DIY Audio thread, show you DIY audio 'equipment' (Amps, BT etc...)
 
It seem, that it have build-in decoders =pretty limited to decoding what was put there by manufacturer.

Why would you need it, having N900? it can decode whatever you want (and do it better), so just plug speakers (or connect them via bluetooth), for 1/4 of that price, or do like dr_frost_dk and build high quality ones, equally cheaply.

/Estel

Ps.

As for building, I would suggest wooden resonance boxes, even for very small speakers - sound quality difference from plastic (any kind) ones is exorbitant, no matter of speakers. Of course, better speakers gain even more thanks to wood (plastic won't let them unlease full potential).

/Estel

Win7Mac 2012-10-30 00:22
Re: DIY Audio thread, show you DIY audio 'equipment' (Amps, BT etc...)
 
Quote:
Originally Posted by Estel (Post 1287352)
It seem, that it have build-in decoders =pretty limited to decoding what was put there by manufacturer.

Why would you need it, having N900? it can decode whatever you want (and do it better), so just plug speakers (or connect them via bluetooth), for 1/4 of that price, or do like dr_frost_dk and build high quality ones, equally cheaply.
/Estel
Have a look at my signature and you'll see I don't have a N900.
I would need it primarily as... stereo speaker! Connected via 3,5mm.
Nice to have possibility to connect other sources too. It's bonus, that's it.
Not as smart as a polished DIY but saves hours of time.
And I doubt you'd build something similar out of wood with given budget.

azkay 2012-10-30 02:12
Re: DIY Audio thread, show you DIY audio 'equipment' (Amps, BT etc...)
 
Quote:
Originally Posted by Win7Mac (Post 1287353)
Have a look at my signature and you'll see I don't have a N900.
I would need it primarily as... stereo speaker! Connected via 3,5mm.
Nice to have possibility to connect other sources too. It's bonus, that's it.
Not as smart as a polished DIY but saves hours of time.
And I doubt you'd build something similar out of wood with given budget.
Wood is cheap, I'm sure you can find a broken desk or something for $1.

dr_frost_dk 2012-11-27 22:40
Re: DIY Audio thread, show you DIY audio 'equipment' (Amps, BT etc...)
 
Made a new dock, well i remade a new dock, got this dock to fix and could not fix it, it had failed after some time and audio stopped working, but since i could not fix it i could keep it since owner could not use it.

So i threw in 2x VMA2012 to get the light working, well not a problem to make it work but why not go "all" out and make it go to the music, so one amp drives the speakers and the other drives the LED's

It is not done yet thou, need to put battery inside, im thinking about throwing in a 18650 since i have some left and i have the sockets so they can easily be changed if they go bad, charging can be done by the power socket that is used now with a battery attached to the wire, battery is 650mAh from a EGO-T cigarette, contacts to turn on light and AMP needs to be fitted properly.

Light could be brighter, this can be achieved with DIY led "controller" or using more powerfull amps but that will require more volts so more battery's etc..

https://dl.dropbox.com/u/29047266/ip...121127_007.jpg
https://dl.dropbox.com/u/29047266/ip...121127_010.jpg
https://dl.dropbox.com/u/29047266/ip...121127_011.jpg

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Video demo of the light's
https://www.youtube.com/watch?v=DKFx30eGZBc

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