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Showing content with the highest reputation on 02/06/2011 in all areas

  1. 1 point
  2. 1 point
    Never gets this cold in phoenix.. LOL but the install still went on... HMMMM
  3. 1 point
  4. 1 point
    Take a pencil ,eraser first, and push the dent out from through the pole vent.
  5. 1 point
    Sawzall! That's a easy fix lol. Not going to cut up the car, I actually had to disassemble the box to take it out though. lol I love it sealed. I'd like to see how this ends up.
  6. 1 point
    Well, I'm bored, so we're going to go through the math anyways. Let's say you have a 1000w amp and two dual 2ohm subwoofers wired to a final 2ohm load. First, let's find out the total voltage and current output of the amplifier. Using basic ohm's law, we find: Voltage = sqrt(voltage * resistance) = sqrt(1000*2) = 44.72V Current = Watts/Volts = 1000/44.72 = 22.36A And, to verify we are right, 44.72 * 22.36 = 1000w. Cool, step 1 complete. Now let's find out out much voltage and current each speaker is receiving. Let's just look at the two drivers on the "whole", forget about individual coils right now. Each driver is 4ohm (since the individual coils are wired in series) and the two drivers are wired in parallel. One thing we know about parallel circuits is that the voltage is the same across the resistors, so we know each driver is going to be seeing 44.72V. To figure out how much current each driver is going to see, we divide the voltage by their resistance; Current = Volt/Resistance = 44.72/4 = 11.18A So how much power is each driver receiving? Simply multiple voltage and current; 44.72V * 11.18A = 500w. Cool, so we know each driver is going to see 500w. Now, how much power is each coil going to receive? Well, in a series circuit, the voltage is "split" between the resistors and current stays the same. So current to each coil is 11.18A. Voltage = Amps * Resistance = 11.18 * 2 = 22.36V And power to each coil is voltage multiplied by current; 22.36 * 11.18 = 250w to each individual coil. So, there it is. Basic Ohms Law. Each coil will receive 250w. Or, since all of the "resistors" (coils) are the same resistance......we can skip all of that headache and just divide the power by the number of coils; 1000/4 = 250w. You would really only need to bust out Ohms Law to figure this out if you had drivers that were different impedances. And then it gets a little more hairy.
  7. 1 point
    Going to disagree with that. When I have time or when Scott has time we'll make a graph with what we found. Power is power..but what isn't being considered is your time value of a 'square' or 'clipped' wave over the cycle period. You are at the extremes of the wave form MUCH longer which induces a significant amount of more heat to build up...which..kills the sub. Seen there...and below in the following 3 images. Yes the 'power' is 'power' and 'watts' is 'watts'...but you are not considering it over a given period of time where the coil is literally standing still burning and then immediately slamming in reverse and standing there and burning until it gets slammed forward by the fets. It is like trying to change gears without pushing in the clutch while traveling 70mph forward and 70mph rearword. Clipping...induces a SHIT ton more heat over this period of time..the heat and the coil bouncing off of the switching frequency of the output transistors..causes it to melt.
  8. 1 point
    Any update on this? If it's not going to be covered or anything I'd like to go ahead and pay and get it shipped out.... I'm having to push everything back now since my equipment failure. Thanks!
  9. 1 point
    Stupid question: If his alts are done and have been forever, and you're just waiting to complete the brackets......why not ship the guy his alts (more than likely the most costly part of this transaction), and DC Power contract and pay for someone like tejcurrent, another manufacturer right here on this forum, to build the brackets? It seems like this would go a long way towards completing the transaction on a pretty timely basis. At the very least, this would put the biggest chunk of change back into the OP's hands by having a tangible product in his possession. Then the only thing left is the bracket, which if another manufacturer such as tejcurrent can't produce on a timely basis, it's less of a refund that would need to be made by DC. And the OP can be on his merry way finding someone who can build a bracket for him. With all of the machine shops in the US, and another manufacturer right here on this forum whose explicit business is building alt brackets, I can't believe this isn't something that could have been completed at least since the start of this thread.....much less nearly 2 years.
  10. -1 points
    I never did like the look of those new N2's...
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