In article QYxTf.6169$wD1.5289@trnddc02,
"Phonedude" wrote:

"Kevin McMurtrie" wrote in message
...
In article ,
"MOSFET" wrote:

It's loud, but not as loud as a 300
lb sub should be.

Are you sure you heard it driven with enough power? I just reread the
specifications on this thing and it says 6,000 watts RMS, 12,000 watts
peak.
The amount of current required to achieve this kind of wattage (ON A
CONTINUOUS BASIS!) would be massive. A couple of 1500 watt class D amps
just wouldn't cut it. Sure, SPL vehicles routinely spit-out this much
power, but it is always for very brief bursts. I have to imagine that if
you COULD find an amp or amps to provide this much power (and then a way
to
supply these amps with a CONTINUOUS supply of the 1000's of amperes
needed),
it probably would be pretty damn impressive!

But, of course, what I just said really defines the problem with a
subwoofer
like this. It is certainly a technological marvel, but it seems nearly
impossible to fully utilize it in an autosound environment.

MOSFET

You'd need over 150VDC to get 6KW RMS (12KW peak) into 2 Ohms bridged.
A custom class D amp wired to a hybrid's battery pack is the only way I
can think of to get so much power. Even a hybrid would be running at
high regeneration to maintain 6KW. Forget about using a normal
alternator or a single car battery.

I make it to be 110 volts which, into the 2 ohm load, will produce 55 amps.
As power in watts is current times voltage, this will produce 6050 watts of
energy.

However, when you add in continuous power through a less than perfectly
efficient amplifier, I would suspect your 150 volt figure might be somewhat
low. Maybe 200 or more volts would be required.

Power, when measured the nice way, is from a sine wave. A sine wave has
an average voltage of sqrt(2)/2 and, into a resistive load, an average
power half of the peak power.

150V into 2 Ohms is 75A, 150V @ 75A is 11250W.
For a sine wave you'd have 5625W RMS.


What kind of energy with what quality of signal and what quality of physical
sound produced is very questionable.

So, can we use 16 gauge wire for this speaker?

You bet, as long as it's 16 gauge Monster Cable. It won't burst into
flames, honest. Let me get my camera...

PD