Amp Crossover Settings for Componants

Guy at the shop says high pass, instructions from amp says full range, which is correct? Diamond Audio D3400.4 Amp and Hex S600s Componants.

Also can noise be created from RCAs being next to each other? I have checked everything else out including grounds, wiring from the amp to the componants, and switching RCAs around, and noise is coming from the same componant set no matter what configuration I use.

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2003 Chevrolet Silverado Standard Cab ~ Alpine CDA-9851
Diamond Audio D3600.1 ~ 2x Diamond Audio TM310D4
Diamond Audio D3400.4 ~ Diamond Audio Hex S600s
AstroStart RS5204 Remote Start/Alarm

Amp set to full range.  Let the Hex's crossover do their job and filter the signal.  High pass on the amp will cut off a lot of the low pass frequencies which the HEX midbass driver can reproduce.  Guy at the shop is not to knowledgeable.  Noise from RCAs sitting next to each other is non existant (human year cannot pick it up) otherwise they could not even run the 2 cables for 1 channel on a single RCA cable together.  RCA next to power wires can produce interference (this is not applicable in your case).

How are your gains set?  Does noise come from only one side?

Is the ground bare metal or painted (you need bare metal otherwise a poor ground can cause noise too)?

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(1) Kenwood Excelon Head Unit KDC-X589 (24 bit Burr Brown DAC, 3 X 4 volt RCA).
(1) RF Punch 250A2 - running the components.
(1) Hifonics 6.5" Atlas Components (18db crossovers).

I had changed the crossover to full range after getting back home that day, I figured it was correct but wanted to make sure.

Ground is a bare metal via a hole I drilled directly into the chassis under the carpet and sanded to bare metal around. Noise is only from the passanger components, gains are the exact same for both sides, about 1/3 up via what a volt reading told me was correct output. I am getting stumped on the grounding issue, I feel I have checked everything, and just one set making the noise seems odd.


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2003 Chevrolet Silverado Standard Cab ~ Alpine CDA-9851
Diamond Audio D3600.1 ~ 2x Diamond Audio TM310D4
Diamond Audio D3400.4 ~ Diamond Audio Hex S600s
AstroStart RS5204 Remote Start/Alarm

Well it is not the ground.  Try this:

Swap crossovers around, check to make sure wires are are not touching the terminal next to them (like a strand from one wire hitting the connection next to it).  Also I had a Civic once and had Boston Rallies in it and on the right side the conectors on the speaker were touching the metal frame in the door and shorting out creating noise and also not playing at all, so check this also (I had to enlarge the hole with a Dremmel tool).

Flip RCA cables on amp to see if it is and issue with the channel on the amp or maybe the RCA cables.

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(1) Kenwood Excelon Head Unit KDC-X589 (24 bit Burr Brown DAC, 3 X 4 volt RCA).
(1) RF Punch 250A2 - running the components.
(1) Hifonics 6.5" Atlas Components (18db crossovers).

I changed the RCAs around and it didn't change anything. I also swapped crossovers and no change either. Checked them over pretty well and didn't notice any wire strands anywhere, I vacuumed out the rear to get all the loose copper strands that were on the floor out and no change either, will check the crossovers over again sometime this week.

I had the door apart last weekend and the wires all looked fine, there are no exposed wiring anywhere, plus the doors have been sprayed with a sound deadener so there isn't much in the way of metal for them to touch anyway.

Any other ideas? Thanks for the effort so far.

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2003 Chevrolet Silverado Standard Cab ~ Alpine CDA-9851
Diamond Audio D3600.1 ~ 2x Diamond Audio TM310D4
Diamond Audio D3400.4 ~ Diamond Audio Hex S600s
AstroStart RS5204 Remote Start/Alarm

check the resistance of your ground to your neg terminal... i thought mine was fine for a year and when i got a DVOM and checked the resistance it was ridicuous. A simple 10 awg groud wire from the chassis beam to the negative terminal dropped the resistance substantially.

Have you tried switching the channels on the amp?  If the sound switches sides it is and internal fault of the amplifier.  On one install, I went through 3 amps until I finally got one that eliminated the noise.  Mass manufacturing of electronics can easily cause faults. Good Luck!

Yes he did (read all posts)

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(1) Kenwood Excelon Head Unit KDC-X589 (24 bit Burr Brown DAC, 3 X 4 volt RCA).
(1) RF Punch 250A2 - running the components.
(1) Hifonics 6.5" Atlas Components (18db crossovers).

No he didn't.  SoundAudio is referring to the output terminals at the amp (the speaker wires), not the RCA's.  To my knowledge, this has not been done, and needs to be.  If the problem switches sides, the problem lies within the amp.  If not, it lies within the wiring.  Disconnect the speaker leads, and test for continuity to ground.

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My ex once told me I have a perfect face for radio.

The wiring has been switched at the amplifier and the crossovers before, as well as the polarity reversed on the speakers as a test, no change from any of that. The only thing I have not done that has been suggested is check the resistance of the grounds as I have not had a multimeter for the last couple weeks. I will be buying one this Friday.

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2003 Chevrolet Silverado Standard Cab ~ Alpine CDA-9851
Diamond Audio D3600.1 ~ 2x Diamond Audio TM310D4
Diamond Audio D3400.4 ~ Diamond Audio Hex S600s
AstroStart RS5204 Remote Start/Alarm

what i do is put one contact on the amp's ground and another on the battery terminal (Via 8 awg wire with little to no resistance) and take the resistance measure off that

geepherder - he already did that.  Me and TruckSystem went over 99.99999% of the troubleshooting steps including the wiring.  If you were so interested in this why did you not step in the begining (this topic has been active for a bit).

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(1) Kenwood Excelon Head Unit KDC-X589 (24 bit Burr Brown DAC, 3 X 4 volt RCA).
(1) RF Punch 250A2 - running the components.
(1) Hifonics 6.5" Atlas Components (18db crossovers).

TruckSystem,

I didn't mean to check resistance of the ground, however that may not be a bad idea.  I don't think this will point to the problem, though, since the noise is only on one side.  What I meant was to check if any of the speaker leads are shorted to ground.  Disconnect them at the amp, then test for continuity to the amp ground.

us_test,

From what I read, it appeared that he did not, only switched the RCA's.  The reason I didn't step in sooner is because I stay a lot busier these days, and am not in here near as often anymore.

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My ex once told me I have a perfect face for radio.