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<blockquote data-quote="qkassidyw" data-source="post: 4897869" data-attributes="member: 598965">I posted this under another thread but here it is again:1. Turn off all EQ settings on the deck (Flat, no crossovers on)2. Turn the volume on the deck up to 3/4 volume.3. Get a good quality CD or song off your iPod and play4. Adjust gain slowly until you start hearing distortion (you should be able to tell with it at 3/4 volume)5. Once distortion is reached, turn down slightly until it goes away. (Slowly turn each side of the gain when you are bridging.)Another way to tune is to use a DMM and using the same steps listed above (except you should be playing a 60 Hz tone) but actually disconnect the sub from the amp and measure the voltage on the output using the Volts AC setting. Example: If your sub is 4 ohms and needs 175 RMS then you would adjust the gain until the voltage hit 26.4 Volts ACAlso type of deck, type of sub, and type of vehicle would help.</blockquote>

[QUOTE="qkassidyw, post: 4897869, member: 598965"] I posted this under another thread but here it is again: 1. Turn off all EQ settings on the deck (Flat, no crossovers on) 2. Turn the volume on the deck up to 3/4 volume. 3. Get a good quality CD or song off your iPod and play 4. Adjust gain slowly until you start hearing distortion (you should be able to tell with it at 3/4 volume) 5. Once distortion is reached, turn down slightly until it goes away. (Slowly turn each side of the gain when you are bridging.) Another way to tune is to use a DMM and using the same steps listed above (except you should be playing a 60 Hz tone) but actually disconnect the sub from the amp and measure the voltage on the output using the Volts AC setting. Example: If your sub is 4 ohms and needs 175 RMS then you would adjust the gain until the voltage hit 26.4 Volts AC Also type of deck, type of sub, and type of vehicle would help. [/QUOTE]

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