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Old 28th September 2010, 08:43 PM   #1
Taye1 is offline Taye1  South Africa
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Default 1st project!!!!

Check out my intro on my profile

Well this my 1st project, but a lil' info first.

Many of you may know of those portable external speakers that people use for their Ipods and stuff. Well I wanna make my own but more powerful!!!
and well there's these guys at school that like to show off with their speakers so I wanna shut em up.

Well this is what I've done and got so far:

Click the image to open in full size.Click the image to open in full size.Click the image to open in full size.Click the image to open in full size.A

TEH SHOX EATER!!!!(Not done yet.)

  • A 6x9 speaker from a car (4 ohms, 30-70watts)
  • RCA cable
  • Speaker wire
  • A tiny tweeter (Also from a car.)
  • RCA conversion to a 3.5mm male jack.
  • Kenwood split system component.
  • Will make the enclosure later.
(No amp!!!)
^^^ There's the problem. I did a test run using my cellphone as the music player and it's really quiet..... I wanna make an amp but I don't know how and what components I need and where to get em.

The End..... For now

Any ideas,comments, and changes are welcome
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Old 29th September 2010, 02:54 AM   #2
star882 is offline star882  United States
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You can just buy a cheap amp from Goodwill if you want something that just works, or you can do a modern design using a chip from TI or some other semiconductor company.
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Old 29th September 2010, 09:35 AM   #3
Taye1 is offline Taye1  South Africa
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^^^ The thing is that I wanna build it.

Can I use a chipset from an old RC Car?
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Old 29th September 2010, 02:55 PM   #4
star882 is offline star882  United States
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Motor drives operate at too low a carrier frequency for audio. They're typically in the few kHz range while TI's Hybrid Digital chips operate at 250kHz and above.
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Old 29th September 2010, 05:56 PM   #5
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Hmmm...

If you wanna really shut them up, a small switching amplifier (there's some decent kits on 41Hz.com/shop), powered by a 12v battery would work. There's some really really small amplifiers, but they use small SMDs, so a compromise could be the amp6-basic.

Apart from that, I'm sure the guys here can recommend you some other amplifiers.

You're also going to need a cabinet for that driver.
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Old 1st November 2010, 06:52 PM   #6
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You can have a weak puny amp as long as you find speakers with really high efficiency. I rock my room with one watt and 95dB / watt speakers.
I second finding a small chip amp. There are plenty on ebay.
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