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<blockquote data-quote="fubada" data-source="post: 7963205" data-attributes="member: 647494">Hi, this is question/post about some mistakes that I&#039;ve made setting gain on my JL monoamp. This is my first aftermarket car audio system, which means I&#039;m a complete newb, so please bare with my ignorance while I catch up to speed. I&#039;m using a Pioneer headunit, JL XD600/1 monoamp, JL 10w3v3-4ohm subwoofer, everything was self-installed.I followed JL&#039;s input sensitivity procedure to set the desired output of 40v at 4ohm. I turned OFF all processing/eq/bassboost/loudness, set HU volume to 30 (range 0-40), set HU subwoofer level to 4 (range -15-6), played the 50hz tone, while adjusting the gain screw until my DMM read 40v AC. I was happy with the results and put the cover back on my amp.Then I turned on EQ, set Loudness to MID, but did not realize that I will need to readjust (downward) the gain.&nbsp; I listened to my system this way for about 2 days, and then decided to check the voltage while playing a 50hz tone at my highest listening volume of 22, (range 0-40). The output voltage was 51v, the recommended is 40v. What is the likelihood that this caused damage to my amp/sub?Since then I&#039;ve decided to disable loudness, and repeated JL&#039;s procedure with EQ on, so now my gain is set correctly.Thank you</blockquote>

[QUOTE="fubada, post: 7963205, member: 647494"] Hi, this is question/post about some mistakes that I've made setting gain on my JL monoamp. This is my first aftermarket car audio system, which means I'm a complete newb, so please bare with my ignorance while I catch up to speed. I'm using a Pioneer headunit, JL XD600/1 monoamp, JL 10w3v3-4ohm subwoofer, everything was self-installed. I followed JL's input sensitivity procedure to set the desired output of 40v at 4ohm. I turned OFF all processing/eq/bassboost/loudness, set HU volume to 30 (range 0-40), set HU subwoofer level to 4 (range -15-6), played the 50hz tone, while adjusting the gain screw until my DMM read 40v AC. I was happy with the results and put the cover back on my amp. Then I turned on EQ, set Loudness to MID, but did not realize that I will need to readjust (downward) the gain. I listened to my system this way for about 2 days, and then decided to check the voltage while playing a 50hz tone at my highest listening volume of 22, (range 0-40). The output voltage was 51v, the recommended is 40v. What is the likelihood that this caused damage to my amp/sub? Since then I've decided to disable loudness, and repeated JL's procedure with EQ on, so now my gain is set correctly. Thank you [/QUOTE]

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