🚀 go-pugleaf

Carl Smith writes:
> Jason Reiser... Asleep writes:
>> Carl Smith writes:

(Stuff deleted)
 
> Well, again, the original poster mentioned "multi-kilowatt" amps.  I
> assume that if you have a 1000 watt amp that you don't run it at
> 30 watts all the time.  If you run it at 1/3 or half volume, you
> still have to be drawing a few hundred watts average, which the 
> average cars electrical system can't supply indefinitely without
> battery discharge...

No, remember we are talking about a log function. 3dB increase is 
double the power, and 10dB is 10 times the power. If you assume
that full volume is 0dB attenuation, and produces full output,
and half volume is 20dB attenuation, then assuming 1kW at full output,
you get 10W at half volume.

(Stuff Deleted)
  
>>That's fine, but
>>as I said, it's not going to be opertaing at full output at all times
>>(I hope for your ears sake). 
 
> Yeah, that's another thing that makes me wonder about the people with
> massive amps.  A kilowatt of sound, even at 1/3 volume, should be
> !@#@!$ loud.  Not to mention the fact that when you crank it up
> you probably won't have windows in your car for long.  My 200W
> home stereo makes the glass in my bedroom window rattle at about 
> half volume...

I would assume that most amps for the car market would have about the same 
voltage gain, in which case a quarter turn of the volume knob would 
produce the same results with any power amp. I don't know if this is the
case, though. Most "pro" amps have about the same voltage gain, within a 
dB or so.

(More stuff Deleted) 
> Well, like you said yourself above, you need some headroom for
> loud transients, so buy one twice as loud as you plan to use it,
> and keep it at half volume or less.  :)

Better yet, allow for 8 to 15dB of headroom above average output.


						Mur
						Cullen@ac.dal.ca
						Cullen@ug.cs.dal.ca