New install fade and balance problem - help

[jeffgre_6163]

Moderators
If this is in the wrong forum please advise and I will move

I recently upgraded the system in my 2020 Mitsubishi dual cab ute.
While it is a HUGE improvement over stock there are a few issues with fading and balance, 2 and four channel switching
Before I take it back to the installer I would like to know where the issues are so I can maybe help get it sorted fast rather than have them try and work it out while I wait for a couple of hours
To cut the installer some slack, I was running late when I picked it up, pushed them to finish the install and left without a full system test.

Advice and where to look would be appreciated

Car:
2020 Mitsubishi Triton duel cab ute

System:
Head unit: Stock 2019/20 Mitsubishi 7.5 touch screen head unit with Carplay etc
Amp: Pioneer CM-D8704 2-3-4 Channel 1200w
Front speakers: Focal Access 165AS components with separate cross overs
Rear: Kicker CSC65 Co-ax
Sub: Kicker hideaway 150s 11HS8
Sound deadening through out doors, floor and roof to come.

Problems:
When set to 2 channel

• When fading to front rear stays working with no effect to overall fad
• When fading to rear, both front and rear fade out completely
• I have been running it with full fade to the front

Overall it sound great though

When set to 4 channel:

• When fade centred it plays all speakers but stereo separation disappears
• [I assume this is because the speaker hook up has set the front right and rear left and the front left and rear right as pairs so cancelled out the audible stereo separation]
• When balanced to right, rear speakers fade to nothing
• When balanced to left, front speakers fade to nothing
• When fade to front, Plays front left and rear right with good stereo separation diagonally across the car
• When fade to rear, Plays front right and rear left with good stereo separation diagonally across the car

Sub woofer works well at either 2 of 4 channel setting

Yes, I am taking it back to the installer but if I can help with a solution it will speed up the fix.

Cheers

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[Popwarhomie 5,000+ posts]

Line output converter not installed correctly.

 

[n2audio 5,000+ posts]

Ugh, such a pain.

For starters, it sounds like your rights are set up as fronts, and your lefts are set up as rears.
But there's probably a polarity or two switched along the way as well.

You could start by setting the fade/bal to FR/LT, disconnecting the rca's at the amp and plug them in Ch1 one at a time until you get sound. Same thing with FR/RT Ch2 and the remaining three rca's. Then LT rear Ch3. Then you'll be left with RR.

If it's still funky you're dealing with some phase screw ups (+/-'s switched somewhere) which takes a lot more digging to figure out.

I spent last weekend doing all this same crap - I've been tolerating phase problems for months, actually over a year. Took several hours and eventually deciding to eliminate my LOC completely. Now SQ is way up, my noise is nearly eliminated and bal/fade works like it's supposed to