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13.The Pioneer TS-C160R speaker's passive crossover has two areas for attaching the positive lead for the tweeters. As you can see, the positive lead is marked -3 dB. This means that if the positive lead is attached to this connection, the tweeter will be reduced by 3 decibels over the other speakers. In some cases, as the volume is turned up, the tweeter will progressively overrun the other speaker's volume. Remember, we used the stock speaker wire to run the tweeter, reducing its efficiency, therefore preventing it from getting the same amount of power. For this reason, we connected the positive lead to the second connection, preventing the tweeter from performing at the standard level.