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April 4, 2011 09:20 AM

Categories: Speakers and Subwoofers

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xxCarmaxx

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Joined: 04/04/2011

I'm having a problem with my 600W MTX Terminator amp, when I turn my stereo on, it hits twice, then three red lights flash on top of the amp, at first I thought this was ground issue, so I used an actaul sander to sand down the ground spot to remove any and all paint, and refashioned the ground wire to the spot.  That did not solve the issue. 

Next, I turned my stereo on, and unplugged the remote wire from the amp while the stereo was on, then when I plugged the remote wire back in, the red lights stopped flashing and it worked.  The issue is that I have to do this every time I want to listen to my subs.  Are there any known solutions to this problem?  I'd appreciate any and all constructive feedback, thank you!

- Austin

Discussion:    Add a Comment | Comments 1-14 of 14 | Latest Comment

April 4, 2011 2:54 PM

I'd say it sounds more like a load issue than a power or ground issue, but I'd need more info about the setup. Like what subs do you have attached, and how are they attached?

If it flashes a few times it's probably not the line fuse, but it is worth looking into.

Also, is this a recent issue that just started happening, or is this a new setup that's never worked correctly?

April 4, 2011 3:59 PM

Here are the sub specs:

Model TN12-02
Description 12" Subwoofer
Impedance 2Ω
RMS Power (Watts) 200
Rec. RMS Amplifier Power (Watts) 100 - 200
Sensitivity (1W/1M) 86.4
Voice Coil 1.5"
Magnet Weight (oz.) 28
Mounting Depth 5.44"
Cut Out Diameter 11.078"
Sealed Enclosure Net Volume 1.25ft├?┬│
Vented Enclosure Net Volume 2.0ft├?┬│
Volume Displacement (SD x XMAX) (in├?┬│) 30.92
Tuning Frequency 35Hz

The inline fuse is still intact, and does not look burned. I bought this system on Saturday, and I didn't have this problem until this morning.


I have DB 4-gauge audio wire for the power and ground, its about half an 3/4th of an inch thick and is a very fine wire.

My remote wire is one of those blue wires you get out of a sub kit at wal*mart.

April 5, 2011 10:29 AM

Based on your description, it sounds like you're running the TN400/4, correct?

One thing I notice is that the TN400/4 doesn't appear to be 2-Ohm friendly in bridge mode. Assuming you're running bridged, take it out of bridge mode and just run it off one of the channels. See if you have the same issue.

April 5, 2011 10:59 AM

It's a 600W monoblock, so bridging is not possible.

April 5, 2011 11:06 AM

xxCarmaxx said: It's a 600W monoblock, so bridging is not possible.
Okay. The actual model number of the amp would be useful. I'm not finding an amp like that on the MTX website that I can check out.

April 6, 2011 9:04 AM

Okay, so I've narrowed down the problem. If I turn the stereo on without the RCA's plugged in, it does not go into protect. Then I simply plug the RCA's in and proceed to play music, but if I turn the stereo on WITH the RCA's plugged in, it goes into protect.

April 6, 2011 9:08 AM

xxCarmaxx said: Okay, so I've narrowed down the problem. If I turn the stereo on without the RCA's plugged in, it does not go into protect. Then I simply plug the RCA's in and proceed to play music, but if I turn the stereo on WITH the RCA's plugged in, it goes into protect.

Interesting. I wonder if this is an electrical issue.  Does "Turn on the stereo" = start the engine? Or, does it die turning on the stereo while the car is already running?

April 6, 2011 9:14 AM

"turn on the stereo" = turning the key to ON, which turns on the stereo. If the car is running, and I turn on the stereo, it will turn on if the RCA's are NOT plugged in. if they are, it will go into power protect.

April 6, 2011 9:51 AM

Hmmm... I have a few thoughts, but we need to start narrowing down the issue between the sub, the amp, and the car.

Do you have another sub you could hook up to your to test with? Preferably something 4-ohm rated? If so, hook it up and see if the issue persists.

Another amp would be another thing to try, but that's probably more difficult.

May 15, 2011 6:43 AM updated: May 15, 2011 6:47 AM

Similar problem ... only works on full and hpf not log though . I'm thinking it has somethin to do with my gain I have ran to the front of car when I turn it on lpf subs make grinding sound and on fu it don't work at all on full

View unverified member's comment - posted by Kenjifujima

View unverified member's comment - posted by Jacob Stradiota

December 18, 2011 2:13 PM

Hey Jacob,

The problem ended up being the RCA jacks on my head unit. If you have different RCA ports to use on the back of your head unit, use those.. or get a new head unit.

View unverified member's comment - posted by Smercer14

Discussion:    Add a Comment | Back to Top | Comments 1-14 of 14 | Latest Comment

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