This is the output voltage at which we need to set the gain of the amp. Now, we need to find the target voltage for the amp. Compare this against the ohm resistance of your speaker. Pick up the amplifier’s user manual and find the recommended wattage output. Step 2: Note the amp’s recommended wattage output So, it is safe to note the closest one to the value recorded. Remember, the resistance of maximum loudspeakers is 2, 4, 8, or 16 Ohms. Record the ohm resistance visible in the multimeter. Connect the multimeter’s red probe to the positive terminal and black probe to the negative terminal. Then determine which terminal on the speaker is positive and which is negative. For this, cut off the power supply of the speaker. Test the resistance of the speaker you’ll be connecting to the amp using a digital multimeter. Step 1: Measure the speaker’s resistance using a multimeter Here are the step by step instructions to tune an amp by different methods. To tune the gain controller, all you need is a digital multimeter, speakers, your amplifier’s manual, a calculator, and a CD or pen drive with a test tone. This also prevents the clipping of sound. You can set your amplifier’s gain by matching the head unit’s output A.C. It not only protects your equipment but gives you excellent sound quality too. ![]() Get the most out of your car stereo and sound system by setting your amp’s gains correctly. Music is powerful, and a fantastic sound system makes it even better.
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