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I want to deprogram my rear speakers' EQ

SWallace

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I bought a GT Vert without the Shaker Pro so I added a JL Microsub and tapped the front speakers. After I was really disappointed. I usually only drive with the top down but this week noticed that when I would unlatch the top the audio cuts out for a second and then the bass drops off significantly. So, clearly Ford is playing games with the audio. I thought that I read that they purposely drop the bass with the top down. Need to fix that! Thanks!
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Spart

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SWallace said:
I bought a GT Vert without the Shaker Pro so I added a JL Microsub and tapped the front speakers. After I was really disappointed. I usually only drive with the top down but this week noticed that when I would unlatch the top the audio cuts out for a second and then the bass drops off significantly. So, clearly Ford is playing games with the audio. I thought that I read that they purposely drop the bass with the top down. Need to fix that! Thanks!
Click to expand...
My guess would be you need to follow the instructions for 727-01-02 in the post I linked to: http://www.mustang6g.com/forums/showpost.php?p=1745122&postcount=1299
 

SWallace

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Thank, I saw that but I'm not looking for lineout for all of the speakers. I am still using the factory amp for the speakers in the cabin. Just tapped the fronts for the sub. I just want to kill what I assume is the EQ that kicks in when the top gets dropped.
 
Spart

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That's what I'm getting at. The first two digits of 727-01-02 control the EQ. 727-01-01 controls the type of output.
 

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OK got ya, so setting it to 0 turns it off? I just got my scanner so it will probably be a bit more clear when I plug in.

Thanks!
 

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Spart

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Set only the first two digits of 727-01-02 to zeroes, leave everything else alone.
 
Boggus

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FORSCAN is not showing the ACM module. I can't access the 727 blocks.

I have:
PCM
OBDII
APIM
ICM
PAM
BdyCM
 
Spart

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Boggus said:
FORSCAN is not showing the ACM module. I can't access the 727 blocks.

I have:
PCM
OBDII
APIM
ICM
PAM
BdyCM
Click to expand...
Sounds like you're using an adapter of some sort that can't read MS-CAN - or you need to flip the switch on your adapter from HS-CAN to MS-CAN if it's been modified.

I always recommend the ODBLink MX Bluetooth because it just works for everyone. No switch to flip. Downside is cost.
 

SWallace

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Yeah, I bought the cheap one initially too and that is all that I saw. The one that Spart recommended just came today so I'm going to try it tonight.
 

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Boggus

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Yes, I ordered the same one also. It should show up tomorrow.
 
Spart

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I wish there was a consistent source for modified USB units, but so many of the eBay sellers are fly by night and you can't trust anything listed on Amazon half the time because it might be a different seller every time you look at the listing.
 

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Well, made the changes and no dice. Bass still falls off a cliff when you unlatch the top. Went back in and verified that the change took and the value is still 00 for 727-01-02 in the first two positions. It was 727-01-02 0700 38. I changed it to 727-01-02 0000 38.

I was using the F-150 spreadsheet, is there a Mustang specific one? Any other ideas?
 
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SWallace said:
Well, made the changes and no dice. Bass still falls off a cliff when you unlatch the top. Went back in and verified that the change took and the value is still 00 for 727-01-02 in the first two positions. It was 727-01-02 0700 38. I changed it to 727-01-02 0000 38.

I was using the F-150 spreadsheet, is there a Mustang specific one? Any other ideas?
Click to expand...
The ACM module is the same for the Mustang.

If you have time to do some digging, my advice would be to find a hardtop car configured like yours, and get the as-built for it. Then get the as-built for your car. Then compare them using As-Built Compare. You're looking for differences specifically in the ACM module I would think.
 
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Spart said:
The ACM module is the same for the Mustang.

If you have time to do some digging, my advice would be to find a hardtop car configured like yours, and get the as-built for it. Then get the as-built for your car. Then compare them using As-Built Compare. You're looking for differences specifically in the ACM module I would think.
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Momma told me there'd be days like this, but she never told me I'd have to become a programmer to install a car stereo :frusty:
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