[OZAPRS] DC connectors

[Shaun]

Off topic?

My sub woofer is tracked by APRS Mic-E.  If you are in Sydney and can 
access the Terrey Hills Repeater, (Manly Wahringah Radio Society 
146.875) it has Mic-E capability.

http://aprs.fi/#!mt=roadmap&z=11&call=a%2FVK2XPP-9&timerange=3600&tail=3600

This guy is pretty insane if you are into subwoofers: 
http://www.subwoofer-builder.com/projects.htm

Yes, the DC clipping kills voice coils quite quickly, although to the 
contrary I have lightly toasted a pair of DSE voice coils rated at 15 
watts, probably peak, with a 90 watt RMS amp.

  Happy Easter!

Shaun
On 18/04/2014 9:15 AM, Ray Wells wrote:
> Ah yes! The magic smoke accompanied by the sinking feeling it causes 
> as one sees dollar signs etched on the eyeballs.
>
> This is way OT but you're more likely to see the magic smoke from 
> driving high power speakers with a low power amp than lower power 
> speakers and a high power amp because the former is more likely to 
> flat-top and put DC on the speakers.
>
> In my case the magic smoke came courtesy of 35V appearing across the 
> speaker when the amp module failed.
>
> Ray vk2tv
>
>
> On 18/04/14 09:00, Shaun wrote:
>> I had an earlier home brewed model that went to DC when I failed at 
>> an attempt to bridge 4 channels of an amplifier together.  Then the 
>> smoke came out of the speakers.  :-(
>>
>> From memory this one is probably 33hz for -3db and 20 something hz 
>> for -10db.
>>
>> Unlike true Doof Doof boxed, mine is linear in its response, so no 
>> nasty booming, just lots off bass!
>>
>> Shaun
>>
>
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