Ultra Linear Recent Questions, Troubleshooting Help & Support

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The power antenna wire only supplies 12vdc when the radio is on. When CD or other sources are selected, the power antenna wire goes to 0vdc. The remote turn-on wire provides 12vdc whenever the head-unit is on. If your amps are powered on only when the radio is turned on, I would bet that you have the power antenna wire connected and not the remote turnon wire.

Ultra Linear... | Answered on Dec 13, 2018

Seems that the output stages of amp are blown and it shuts down for self preservation. When you do a lot of blasting amp failure is common especially if you use an equalizer to "soup things up." If you are blasting along at 1000 watts and you add 3 db of boost at a frequency the amp will double the power at that point, If you go up 6 db now the power is up to 4000 and exponentially. And transistors are not like tubes that know their limits.- given the chance they will simply blow themselves away providing power they do not have! You have to be careful at high volume levels.

Ultra Linear... | Answered on Sep 06, 2017

You say you have 2 p312d2 subs. Ok so the d2 stands for dual 2homs (2 X 2homs voice coils per sub) , conecting in parallel the 2 voice coils of only one sub will create 1hom load to the amp, and if your amp is 2homs stable per chanel that means you are lowering too much your homs causing the overhwating to it.

Ultra Linear... | Answered on Oct 21, 2015

Sounds like you have a weak signal on remote wire. If tou placed a jumper your amplifier is staying on.

Ultra Linear... | Answered on Nov 25, 2014

Use a test light or Multimeter to verify that you have at least 12volts on your remote wire as well as your Power cable.

Ultra Linear... | Answered on Nov 24, 2014

Please give more details. When does it cut off? Is it hot?

Ultra Linear... | Answered on Nov 24, 2014

You can start by trying a new fuse, use the correct fuse for your amp. If the fuse is blown, you can look at it and see the middle is burnt connecting the two sides.

Ultra Linear... | Answered on Nov 25, 2010

Check that the amp ground wire is grounded inside the trunk to an unpainted surface. No paint. Scrape it off.

Ultra Linear... | Answered on Oct 17, 2010

yes always make sure you have a good ground

Ultra Linear... | Answered on Aug 12, 2010

hook up the power lead to a switched circuit from the ignition or install a toggle switch

Ultra Linear... | Answered on Apr 28, 2010

you want to put a 30A into the amp and the inline fuse that you put onto the wire should be greater than 30A but not too high for what the wire is rated. The best bet for wire is to buy a wiring kit which comes with fuse holder, right size fuse, wire for main power ground and remote. You may want to double check what is written on amp for the size to put in there. Technically you can put a 100A onto the wire if it is big enough and the fuse on amp will protect the amp from problems. Hope this helps, Good Luck

Ultra Linear... | Answered on Mar 25, 2010

is your amp mounted in a place where there is little space around it? it needs to be able to circulate air properly, so make sure theres nothing covering it up. also, make sure you are speakers are wired to at least a 4 ohm load. if its any lower, it will build up too much heat. let me know what kind of speakers you have connected and how many, and ill tell you how to get it to the proper ohm load.

Ultra Linear... | Answered on Mar 06, 2010


Ultra Linear... | Answered on Feb 02, 2010

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