Question about Kenwood KAC-7202 Car Audio Amplifier

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Probems with my kenwood 7020 amp

How come it will turn on but the sound sound's distorrted it sounds like the sub's are blow so i put them in my outher car and thay work fine it has two grund do i hook them both up

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  • rudy22 Apr 03, 2008

    DO I REALLY NEED THE OUTHER "GND" ? ON THE RCA?

  • rudy22 Apr 03, 2008

    i tryed the setting's and steel no sound

  • rudy22 Apr 04, 2008

    it sounds but can't hear any thing if u toch it i can feel it want to move but it dont play loud to move the sub it 's like not even playing any thing i have a jvc deck 200 watts to that amp and i have 2 "10" jenssen bass sub's i had an 800watt legacy it sounded good i took it out to put the new amp and i have it hooked up like one sub the sub 1 negitiv to thesub 2 positv and froum the amp i have the pos to the pos sub1 on the box and the neg to sub 2 thats how i have all my systems hooked up

  • rudy22 Apr 04, 2008

    I tryed some difrent sub's to the amp and thay do the same thing i tryed to hook them up one sub to one channel and the outher sub to the outher channel and it steel doing the same thing

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The ground nearest "batt" connection is your main ground. The other "GND" is for grounding shielded RCA cables.

If the amp is being used to run subs alone:

  • Set the Bass Boost to 0.
  • Set the LPF Frequency to about 80.
  • Set the Input Sensitivity to 5 (the minimum).
  • Set the Filter to LPF.
If things sound fine at these settings, one at a time, slowly bump the Bass Boost and the Input Sensitivity up, checking the sound quality as you go.

Posted on Apr 02, 2008

  • 1 more comment 
  • Tygh Duval
    Tygh Duval Apr 03, 2008

    If you happen to have RCAs that have a shield that needs grounding, that's where they'd connect. If not, don't connect that "GND" to anything.

    Are grounding/shielded RCAs necessary? I'm sure it depends on who you ask and your situation. For most installations, being careful on where the RCA cables are run and what they are near is usually plenty.

  • Tygh Duval
    Tygh Duval Apr 03, 2008

    Are the subs not outputting at all, or does it still sound "funny"? If there some sound, try and describe it. Give some details on what your subs are, how they're wired, and what your head unit is.

  • Tygh Duval
    Tygh Duval Apr 04, 2008

    Hard to say if it's an amp issue or a connection issue. If you have other subs to try on this amp, I'd try them just to see if they act the same.

    Obviously, if you haven't already, check all your connections (especially RCA preamps between the HU and the amp).

    I don't know if your subs are dual voice coil or not. If they are DVC (dual 4 ohms), your optimum setup is:


    • +'s together on the voice coils of each sub.

    • -'s together on the voice coils of each sub.

    • -'s of Sub A to +'s of Sub B.

    • +'s of Sub A to Left + on the amp.

    • -'s of Sub B to Right - on the amp.

    • Total power per sub = 230W
    If the subs are not DVC (only single 4 ohm voice coil):


    • Sub A + and - to Ch 1 + and -.

    • Sub B + and - to Ch 2 + and -.

    • Total power per sub = 150W

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