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<blockquote data-quote="Bear80" data-source="post: 3160870" data-attributes="member: 578529">Ok, I got some things sorted out on the setup.The crackle at power on isn&#039;t an issue.&nbsp; I had the remote power jumpered from the main power on the amp for testing.&nbsp; Duh, that pretty much by-passes the soft power on of the amp and so it&#039;s no wonder I got a bad crackle from the head unit.&nbsp; Properly tapped on to the head units remote turn on, I no longer have a power on issue.However, the excessive pop with power off is what I&#039;ve really been after.&nbsp; Toyota seems to like the use of the mute signal from the deck to the amp, it&#039;s on pretty much all early 90-current units with external amps.&nbsp; This mute signals at power on, off and FM scanning.&nbsp; Of course with the use of an aftermarket amp this mute feature is not possible, so I&#039;ve found out.&nbsp; Mute is usally a feature built right into the power transitor chipset.Well playing around with my bass link&#039;s remote level control I notice something.&nbsp; If I turned the gain down on the sub prior to turning off the headunit, no thump.&nbsp; Another DUH!&nbsp; If the gain is adjusted down, it will not amplify the signal as much.&nbsp; SO I adjustted the gain on my new amp to the minimum setting.&nbsp; This made a HUGE improvement in the power off pop, now it&#039;s still there but nothing like it was when the gain was set midway.&nbsp; This also caused the adjustment in the deck volume to increase.&nbsp; Meaning I will have to turn it up more by the nob but still having enough adjustment to reach a level beyond my ear comfort.&nbsp; In doing so it also gives me more variable control with the volume.&nbsp; Win-Win.I would like to delete the power off pop all together since this is a &quot;luxury&quot; suv but I can live with the minor pop now.Thanks guys for all the ideas and input, hopefuly what I have to add helps someone else.PS.&nbsp; I assumed since factory decks are becomming more intergrated with the dash what I&#039;ve tried would be more common and that a possible mute solution would be out there, guess not.&nbsp; Either way, turing the gain on the amp down makes for a world of difference.</blockquote>

[QUOTE="Bear80, post: 3160870, member: 578529"] Ok, I got some things sorted out on the setup. The crackle at power on isn't an issue. I had the remote power jumpered from the main power on the amp for testing. Duh, that pretty much by-passes the soft power on of the amp and so it's no wonder I got a bad crackle from the head unit. Properly tapped on to the head units remote turn on, I no longer have a power on issue. However, the excessive pop with power off is what I've really been after. Toyota seems to like the use of the mute signal from the deck to the amp, it's on pretty much all early 90-current units with external amps. This mute signals at power on, off and FM scanning. Of course with the use of an aftermarket amp this mute feature is not possible, so I've found out. Mute is usally a feature built right into the power transitor chipset. Well playing around with my bass link's remote level control I notice something. If I turned the gain down on the sub prior to turning off the headunit, no thump. Another DUH! If the gain is adjusted down, it will not amplify the signal as much. SO I adjustted the gain on my new amp to the minimum setting. This made a HUGE improvement in the power off pop, now it's still there but nothing like it was when the gain was set midway. This also caused the adjustment in the deck volume to increase. Meaning I will have to turn it up more by the nob but still having enough adjustment to reach a level beyond my ear comfort. In doing so it also gives me more variable control with the volume. Win-Win. I would like to delete the power off pop all together since this is a "luxury" suv but I can live with the minor pop now. Thanks guys for all the ideas and input, hopefuly what I have to add helps someone else. PS. I assumed since factory decks are becomming more intergrated with the dash what I've tried would be more common and that a possible mute solution would be out there, guess not. Either way, turing the gain on the amp down makes for a world of difference. [/QUOTE]

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