08 Expy Amp Factory / Aftermarket Amp Wiring

Group using the FO1 and FO2 firmware for Ford SYNC retention * see specific firmware for full feature list.
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OldScout
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08 Expy Amp Factory / Aftermarket Amp Wiring

Post by OldScout » Wed Jun 06, 2018 6:15 pm

In the next couple weekends, I am putting in a whole new system:
SETUP:
2008 Ford Expedition EL
6 Disc / Factory Sub / No Nav / No Sync

REPLACING WITH:
Kenwood DNX874S
Alpine KTP445U Mini Amp
Polk Speakers
Maestro RR / F01

I plan to keep the factory sub amp but replace the factory front amp with the KTP445U.

My question is, do I just do all normal wiring per install manual and then run RCAs from head unit to new amp, then speaker wires from there to each speaker?

Do I need to do anything with sub amp or will it automatically be set up through various harnesses?

Do I need to do anything with the old amp?

Also in the instructions it shows a sub-in & a center-in RCA cables, what are these for, I see no place to attach them.

Thanks, from a noobie!

JustinFerroni
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Re: 08 Expy Amp Factory / Aftermarket Amp Wiring

Post by JustinFerroni » Thu Jun 07, 2018 8:52 am

1- all platforms only have the subwoofer amplified so you should be able to stuff the KTP445U behind the dash and feed high level signal in vs using the RCA's.
2- nothing special is required for the subwoofer amplifier, hookup the remote turn on and connect the RCA labeled SUB-IN to your Sub RCA input on the radio
3-Center-IN RCA is not needed
Justin Ferroni
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TF: 866.427.2999

OldScout
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Re: 08 Expy Amp Factory / Aftermarket Amp Wiring

Post by OldScout » Thu Jun 07, 2018 12:10 pm

Thanks Justin.

But I am unclear on your first point, you say "feed high level signal in vs using the RCA's." - I am unclear what you mean here (or is the "vs" a typo?).

On your second point regarding sub woofer - I have two amps, sub and 4 channel front - can I just splice the bl/wt amp turn on to go to both amps?

Thanks.

018 8:52 am

1- all platforms only have the subwoofer amplified so you should be able to stuff the KTP445U behind the dash and feed high level signal in vs using the RCA's.
2- nothing special is required for the subwoofer amplifier, hookup the remote turn on and connect the RCA labeled SUB-IN to your Sub RCA input on the radio

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Dara DeGrand
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Re: 08 Expy Amp Factory / Aftermarket Amp Wiring

Post by Dara DeGrand » Thu Jun 07, 2018 12:23 pm

He means that you should use the speaker wires for your audio connections, not the RCAs.
Dara DeGrand
Maestro Technical Support Manager
Automotive Data Solutions Inc.
8400 Bougainville, QC
T 514.807.2888
TF 866.427.2999

OldScout
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Re: 08 Expy Amp Factory / Aftermarket Amp Wiring

Post by OldScout » Thu Jun 07, 2018 4:13 pm

Okay, sorry I'm now confused. On other 12volt posts its advised to wire amp via rca directly to radio. Now I'm being told something different.

What is the advantage to not using RCA to attach amp to head unit? If I did as Justin I think suggested then the harness for speakers will have three wires attached for each speaker: one to F01 harness, one to redo harness, one to the amp. Did he mean speaker wires from speakers to amp?

Also, Justin said to attach sub-in rca from F01 to radio - there is no sub-in on radio, did he mean to attach it to sub amp?

JustinFerroni
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Re: 08 Expy Amp Factory / Aftermarket Amp Wiring

Post by JustinFerroni » Fri Jun 08, 2018 10:52 am

I think your confusing everyone. Are you adding a subwoofer amplifier and 4 channel amplifier or just adding a 4 channel amplifier and retaining the factory subwoofer amplifier?

-From your original post it seems like you are trying to add a 4 channel amplifier and retain the factory subwoofer. If this is the case the Sub-In RCA on the FO1 harness will just plug into the radio's Sub-Out RCA, all though you state that it doesn't have one on the radio it indeed does.

-The advantage of using speaker level input into that particular Alpine amplifier is that the amplifier doesn't have all the same components that a traditional amplifier has to reject noise. The speaker level signals are balanced signals which are better at reducing the possibility that unwanted noise you might pick up with the RCA inputs. To wire this up properly you will take the speaker level signal from your radio and connect them the alpine amplifier. Then the output side of the alpine amplifier will go to the FO1 harness. This will also eliminate the need to connect the blue/white amplifier turn on wire to the alpine amplifier, you just need to connect the blue/white to the FO1 harness

Hope that clears everything up
Justin Ferroni
Technical Support Specialist- Maestro
T: 514.807.2888
TF: 866.427.2999

OldScout
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Re: 08 Expy Amp Factory / Aftermarket Amp Wiring

Post by OldScout » Fri Jun 08, 2018 1:55 pm

Thank you Justin,

Yes, I am keeping my factory sub amp. And I am replacing (or eliminating) the factory amp that is just for the 4 door speakers.

Okay, I understand your scenario now. I was getting confused or concerned that the F01 harness has sub-in and was looking for a place on the Kenwood that has it marked as sub-in. I know about the RCA jacks on back of radio but thought those were only "out" and not for "in". Your explanation cleared that up.

Regarding the alpine amp hook up. This makes sense now too. So basically all I do is, rather than attaching radio harness speaker wires directly to F01 as normally would, I just go from radio to amp to F01.

Thanks for clarifying . I'm sure your used to dealing with people that have a better understanding of the basics. Have a good weekend.

OldScout
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Re: 08 Expy Amp Factory / Aftermarket Amp Wiring

Post by OldScout » Fri Jun 15, 2018 8:33 am

One more question, with keeping factory sub amp but adding Alpine front speakers amp, when flashing Rr do I check or uncheck factory amp?
Thanks!

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Dara DeGrand
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Re: 08 Expy Amp Factory / Aftermarket Amp Wiring

Post by Dara DeGrand » Fri Jun 15, 2018 8:37 am

Leave the factory amp selected in your flash.
Dara DeGrand
Maestro Technical Support Manager
Automotive Data Solutions Inc.
8400 Bougainville, QC
T 514.807.2888
TF 866.427.2999

OldScout
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Re: 08 Expy Amp Factory / Aftermarket Amp Wiring

Post by OldScout » Sat Jun 16, 2018 7:21 pm

I've hooked everything up but no power to unit. When I click on one of the connectors to maestro rr I get a small bump or pop out of sub in back of car so I know power is going through unit.

I double checked all connections and they are good.

Two other questions, on Kenwoods, you can bypass e-brake by connecting lt green to black ground. Will this affect anything if F01 e-brake is not connected?

Second, I have OBDII connected on front with the plastic connector it came with. Instructions sound like should be direct wire tap.

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Dara DeGrand
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Re: 08 Expy Amp Factory / Aftermarket Amp Wiring

Post by Dara DeGrand » Mon Jun 18, 2018 9:05 am

If you have access to a meter, check the heavy gauge red wire on the 3-pin of the RR to see if it has power. From what you're describing, it sounds like there is. If so, it's not a maestro problem- check fuses on the radio.

The RR doesn't care if you hook up the light green e-brake wire. We provide it to you for your convenience.

Use the plug- same connections, but easier.
Dara DeGrand
Maestro Technical Support Manager
Automotive Data Solutions Inc.
8400 Bougainville, QC
T 514.807.2888
TF 866.427.2999

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