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Showing content with the highest reputation on 08/19/2010 in all areas

  1. What would cause you to think this? It sounds like you need a lesson on the basics. The impedance isn't "created" by the source as you seem to be implying. You can't just increase the current output and expect impedance to decrease. By just randomly plugging numbers into Ohms Law it may appear this is possible; but it's not. Certain values in the actual circuit must be known before you can attempt to incorporate Ohms Law. The voltage and amperage you are measuring don't create an impedance. You may calculate the impedance, by using Ohms Law, because of the known variables at your disposal (the measured voltage and amperage). But the only reason you are calculating for impedance is because you are measuring the voltage and current, so you need to calculate the missing variable; impedance. To keep things simple, lets assume we are playing a test tone through the system. The load (the speaker in our case) has an impedance. This is a physical property of the loudspeaker, not a theoretical figure calculated by Ohms Law (even if calculating it is how you are able to determine what value the impedance is). The amplifier is operating at a certain level of voltage output. These two properties are going to determine the power output of the amplifier and as a result the amount of current drawn by the load. If the voltage output is 50V and the load is 4ohm, the power output would be 625w and the current output would be 12.5A. If the voltage output is 50V and the load is 2ohm, the power output would be 1250w and the current output would be 25A. The impedance of the speaker is a result of multiple different factors. The design of the enclosure, the frequency being played and the amount of heat in the coil are all going to affect impedance rise. The impedance of a 1ohm speaker at resonance may be 20ohm or more, and there's nothing you can do about it. The only way to increase the amperage output in the above example is to decrease the impedance of the speaker or increase the voltage output of the amplifier. You can not increase the amperage to decrease the impedance. It simply doesn't work that way. I assume your ultimate goal here is to get more power into the subwoofer. If you want to increase the power the subwoofer is receiving, you either need to decrease the impedance of the load (which is NOT going to happen by "creating more AC Amps") or increase the voltage output of the amplifier (which may not be possible without changing amplifiers). Just an FYI, what's going to happen when you push more power into the speaker is that the coil is going to heat up more, causing it's resistance to rise higher, creating a higher impedance, not lower. Are you aiming for an SPL fart cannon or a daily driver system? If your goal is a daily driver system, forget about impedance rise. Forget about measuring voltage and current. Just forget about it, they are ultimately unimportant to your goal. You won't have enough control over any of it to make any difference, so just stop worrying about it.
  2. Nothing wrong with the product, my beef is with Steve Jobs Sorry OP for thread jacking. I'd do the transfer program that Julian suggested, he knows his stuff.
  3. if u do have voltage problems... Take a set of jumper cables and connect ground clamps only, one side to front battery, other side to rear battery ground if there is a battery back there or where the amp is grounded at. If voltage goes up.. u need a better ground or a whole run of ground. No change?, connect the power side and test. Remember- jumper cables more than likely not fused so when connecting power side, do NOT ground any end of those clamps!
  4. yep normal cable. Just use a typical rca cable, just one of the two ends and run from Master BR Out to Slave BR in. Remember, whatever amp that has the headunits rcas going into it, that's the Master and that's the amp that will use BR Out
  5. Optima publicly states that the red top is not meant for use in audio applications, and will not be warrantied. For the 07 Suzuki Reno, we would recommend our D3400 or S3400 Group 34 battery. It is a bit of a tight squeeze, but is the most power you can fit in that space without major modifications. Thanks!

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