[OZAPRS] DC connectors
vk2xpp at optusnet.com.au
Fri Apr 18 09:27:46 EST 2014
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.
This guy is pretty insane if you are into subwoofers:
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.
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!
> OZAPRS mailing list
> OZAPRS at aprs.net.au
More information about the OZAPRS