[dorkbotnyc-blabber] mono powered speakers

[Jascha Narveson]

Ah, that was it - i just called myself and heard the burst of noise.

thanks,

j


On Jan 25, 2008, at 2:40 PM, Kevin Balktick wrote:

> Is it near something that would create radio/magnetic interference,  
> such as your cell phone?
>
>
>
> Kevin.
>
> On Jan 25, 2008, at 2:27 PM, Jascha Narveson wrote:
>
>>
>> Hi, Brent -
>>
>> Hm, this is interesting.  I've purchased a $20 pair of computer  
>> speakers and have cut one off.  Right now I'm playing a CD walkman  
>> through the other one, and I do notice occasionally the speaker  
>> will cough up little bursts of noise - not super frequent, but  
>> once or twice every few minutes or so.  Is this the kind of  
>> behavior which I can expect from having chopped the other speaker  
>> off?
>>
>> thanks,
>>
>> jascha
>>
>> On Jan 23, 2008, at 9:29 AM, Brent Buescher wrote:
>>
>>> You won't get cheaper than half a normal computer speaker set; in  
>>> fact
>>> you should be able to find computer speaker sets with one dead  
>>> speaker
>>> for free.
>>>
>>> The only problem with that approach is that computer speaker
>>> amplifiers (and similar things for mp3 players and such) have fairly
>>> low-impedance inputs.  This means they put a load on your circuit  
>>> when
>>> you hook them up to it, which can make it behave differently than  
>>> when
>>> they're not hooked up.  May or may not matter for your application.
>>>
>>> The little Radio Shack speaker has a high-impedance input, or at  
>>> least
>>> older models did.  I have one in my toolbox for tracing out audio
>>> signals and so on.  It is a little expensive for what you get and
>>> adding a wall wart doesn't make it any cheaper.
>>>
>>> If you want something bigger with high-impedance inputs, watch
>>> discount stores like Wal-Mart and Target for when they put their  
>>> cheap
>>> little guitar amps on sale.
>>>
>>> Another approach: if you trace out radios you can usually find the
>>> input to the audio amplifier and add an auxiliary input.  Wal- 
>>> Mart has
>>> $5 clock radios that would be easy to convert into little mono
>>> amplifiers.
>>>
>>> Brent
>>> .................................................................... 
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