Question about Kicker ZX400.1 Car Audio Amplifier

1 Answer

Power Protection Circuit (SORT) Engaged

I have a Kicker ZX400.1 amp that was running a Alpine Type R 10" 4 Ohm. I switched to the Kicker CVT 10" 2 ohm, after i finished hooking up the new sub, my amps protection circuit led came on showing Red for 3-4 seconds then green for half a second and this keeps going on and on. I checked all of my connections, they are all good and tight, don't have an ohm meter to check voltages however. Re-hooked up the alpine sub, still didnt work. I am running 1/0 guage wire to a distrubution block, then 4 guage to the amp from the distrubution block. my other amp, Phoniex Gold 6600 is working just fine.

Posted by on

1 Answer

  • Level 1:

    An expert who has achieved level 1.


    An expert who has answered 20 questions.


    An expert that has over 10 points.


    An expert whose answer got voted for 2 times.

  • Contributor
  • 62 Answers
Re: Power Protection Circuit (SORT) Engaged

Umm a ohm meter would help you here. Double check the wires from the sub to the amp...make sure its not shorting out. Try starting the amp without the wires on the terminals...if the protection shows up then there is a short inside the unit and it will need to be replaced/repaired.

Posted on Mar 25, 2007

Add Your Answer

0 characters

Uploading: 0%


Complete. Click "Add" to insert your video. Add


3 Points

Related Questions:

1 Answer

I have 2 10" Kicker Comp Subs

That amplifier is only rated at 150 watts at 4 ohms, or 300 watts at 2 ohms. Not a very strong amp to run 2 kicker comps. My guess is you have the subs wired wrong for your application. There are 2 types of subs, one is a dual 4 ohm, and one is a dual 2 ohm. Most people bridge these coils together and that cuts your ohms in half. For example. Lets say you have the 10cvr104 subs. Thats the dual 4 ohm sub. You wire the coils together in parallel, now its a 2 ohm sub. You have 2 of these subs running off of your amp, if they are hooked up in parallel, now you have a 1 ohm load, out of the amplifiers normal operation. Your amplifiers internals heat up really quick and there is a thermal overload, putting your amplifier into circuit protection mode. My suggestion for wiring your subs is as follows: for each speaker, wire the coils together like this- positive coil1 to negative coil 2 and negative coil 1 to positive coil 2. That is called running in series, and doubles your ohm load. Next, we need to wire the speakers together properly to hook up to your amplifier. For this, since the coils are hooked together, you only need to use one set of terminals from each sub. And take the positive from sub 1 and hook it to positive of amp. Take negative sub 1 and hook it to positive of sub 2. Take negative of sub 2 and hook it to negative of amp.

Aug 30, 2012 | Rockford Fosgate Punch 301M Car Audio...

1 Answer

Kicker zx650.4 amp turned off and on

could be a couple of things going wrong. could have overheated and shutdown to protect it. could have hand to many incoming wattage/voltage from your head unit and shutdown. could be that the ohms rating on your speakers is to low or that the speakers could have heated up and bumped the guilds and caused it to shutdown. don't know if you know how ohms works. but here is an exp. if you have and have that is rated at 4 ohm stable and that is the lostes ohm recomened for it. and you have two 4 ohm rated subs. you can run them and run them with no problem as long as you don't bridge them. run them off of the same port on the amp. when bridging them it devides the ohms in half. so 2 4ohms would become 2 ohm. 2 8ohm would become 4 ohm etc. if you are running 4 speakers in pair that are 8 ohm each the total together would be 2ohm. hope this helps. try to duplacate the conditions that was going the other day when it shut down same bass settings same song etc and see if it happens again if so try unhooking one of the speakers and try it again if it don't do it it was overloading it if it was overloading and you know its right ohms etc. send it in sorry this is so long.

May 01, 2010 | Kicker ZX650.4 Multi-Channel Amp - 480W ZX...

1 Answer

Is this a good amp

I classify this as a sleeper of the car audio industry. it is powerful, well built, cheap, feature laden, sounds great! very comparible to the big names such as kicker, alpine, fosgate an all the rest. i would prefer this amp over any of them any day of the week! here are the specs for it incase u didn't have them.
  • Max. Power Output: 800W x2Ch.= 1600W @2 Ohms
  • Power Output:
    • 330W x 2Ch.(@2 Ohms) Less Than 0.5% THD
    • 220W x 2Ch.(@4 Ohms) Less Than 0.3%THD
    • Bridge: 660W x 1 Ch.(@4 Ohms) Less Than 0.5% THD
  • All Measurements Done @ 14.4V DC, 1 KHz Input Signal.
  • Dual VU-Meter
  • Dual Fan Cooling System.
  • LPF (Low Pass Filter) Variable 30Hz-250Hz
  • HPF(High Pass Filter) Variable 50Hz-l KHz.
  • Slope Adjustable 12-24dB.
  • Variable Bass Frequency(30Hz-120Hz).
  • Variable 0-18db Bass Boost.
  • High & Low Adjustable Level Input.
  • Dual LED Indicated Power Status (Protect/Power).
  • Mosfet DC-DC Switching Power Supply.
  • Built-in Protection Against Short Circuit, High Temperature & Overload.
  • Auto Power On/Oft By Remote (+12V).
  • Dimensions(mm) : 300(W) x 57(H) x 697(L)

Apr 04, 2010 | Rockwood 4224RTX Car Audio Amplifier

1 Answer

My amp goes into protection mode when i turn on my car. It gets hot too. I had 2 kicker 12" l5's and blew the subs with that amp, could i just have a simple problem with the amp? What are all my options?

Protection LED on, no output? Amplifi er is very hot = thermal protection is engaged. Test for proper
impedance at the speaker terminals with a VOM meter (see the diagrams in this manual for minimum
recommended impedance and multiple speaker wiring suggestions). Also check for adequate airfl ow around
the amplifi er. Amplifi er shuts down only while vehicle is running = voltage protection circuitry is engaged.
Voltage to the amplifi er is not within the 10–16 volt operating range. Have the vehicle’s charging and electrical
system inspected. Amplifi er will only play at low volume levels = short circuit protection is engaged. Check
for speaker wires shorted to each other or to the vehicle chassis. Check for damaged speakers or speaker(s)
operating below the minimum recommended impedance.
No or low output? Check the balance control on source unit Check the RCA (or speaker input) and
speaker output connections.

Jan 29, 2010 | Kicker ZX10001 Car Audio Amplifier

1 Answer

Amplifier displays "CUR"

Hello anwbrown,

The "CUR" display means that the amp is drawing excessive current and the protection circuit is activating. Too low impedance or shorted speakers will cause the amp to draw excessive current.

The Alpine V12 is a Class D mono amp with only one set of speaker outputs. All versions, M301, M501, and M1001 are only stable to 2ohms. Assuming that all 6 of your connected subwoofers and speakers are 4ohm and they're all connected in parallel, the amp sees a .67 ohm load, far below it's rated impedance.

When brand new, the amp could probably operate at low to moderate volume levels without drawing excessive current. But as electronic components age, their tolerances change and they become less able to withstand excessive current or mismatched impedances.

I'd get a 4-channel amp and drive the 4" speakers off the front channels and the 6X9's off the rear channels. And just power the subs off the V12 making sure that they are connected to show a minimum load of 2ohms.

Hope this helps.

Jul 27, 2009 | Alpine MRV-F345 Car Audio Amplifier

1 Answer

Kicker protection light won't shut off

Hello newwithtech,

There are 4 possible causes for the amp to go into protection mode. Kicker calls it SORT for Short, Overvoltage, Reverse polarity, and Thermal. If the amp has been in and working properly, it's probably not reverse polarity. And if it goes immediately into protection when power is connected, I'd rule out thermal. So it's probably either a short or overvoltage.

1) Start by removing the speaker wires and see if the amp powers up properly. If it does, one or more of the speakers is shorted or grounded.

2) Test each pair of wires with a multimeter set to the lowest resistance (ohms) scale. Measure across each pair and from each individual wire to ground. Across each pair, the meter should read about 3-4 ohms. From each individual wire to ground, it should read infinity. If the meter reads "0" ohms (shorted) in any test, you have located the problem.

3) If the speaker wires test OK, set the meter to read DC volts and measure the voltage at the amp positive terminal. If the voltage is higher than 16V or lower than 9V, you've located the problem.

4) If the voltage is OK, remove the RCA inputs and test for proper power up. If it powers up without going into protection, you have a shorted/grounded input. Replace them one at a time to determine which one(s) is/are defective and replace the cable.

If these tests show all the wiring is good and the voltage is OK, the amp is probably shorted internally (most likely an output MOSFET), and requires service at the component level. You need to take it to your local audio shop or send it to Kicker for repair.

Hope this helps.

Jun 29, 2009 | Kicker KX300.4 Car Audio Amplifier

1 Answer

Installing two amps

No, thats what you don't what to do. Even if you have 2 matching amps you don't do that. Every amp puts out different, and for 2 subs, you want to play at the the same time. If your only running 2 10's, I personal would just run the alpine (it's a mono amp made especially for subs) thats plenty for what you have. make sure you bridge them to get the full response. And your other amp i would use for your highs or mids, but run it @ stereo , which is 300 w @ 4 ohms. (Note: 600w @ 2ohms would be bridged and would play in Mono)

Building Competition stereo's is a big hobby of mine.

May 04, 2009 | Alpine MRD-M605 - V12 MONO AMP 600WX1 RMS...

2 Answers

Kicker zx1000 only plays at low volume

how high did you turn the gain up and or the freq. mode most soun good at 90to 120hz. any higher some amps trip, and your speakers may not be able to handel the amp.

Jul 20, 2008 | Kicker ZX10001 Car Audio Amplifier

1 Answer

Blinking protection light on mrv-t757 amp

Could be the power supply or output stage electrolytic capacitors.
Possibly breaking down/drying out inside.

Mar 17, 2008 | Alpine MRV-T757 Car Audio Amplifier

2 Answers

My amp goes into protection mode at high volume

need more info, make and model of amp and subs please

Feb 18, 2008 | Kicker DX350 Car Audio Amplifier

Not finding what you are looking for?

Open Questions:

See all Kicker ZX400.1 Car Audio Amplifier Questions

Car Amplifiers Logo

Related Topics:

192 people viewed this question

Ask a Question

Usually answered in minutes!

Top Kicker Car Amplifiers Experts

Tygh Duval
Tygh Duval

Level 2 Expert

290 Answers


Level 3 Expert

56836 Answers

Robert marquette

Level 2 Expert

102 Answers

Are you a Kicker Car Amplifier Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides