Ultra Linear Answered Questions & Fixed Issues

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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 | 70 views


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 | 2,393 views


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 | 90 views


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 | 69 views


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

Ultra Linear... | Answered on Nov 24, 2014 | 58 views


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 | 15,196 views


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 | 105 views


yes always make sure you have a good ground

Ultra Linear... | Answered on Aug 12, 2010 | 54 views


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

Ultra Linear... | Answered on Apr 28, 2010 | 100 views


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 | 131 views


PROBABLY THE MAIN AGENTS THAT MADE THE UNIT

Ultra Linear... | Answered on Feb 02, 2010 | 135 views


YOUR METHOD OF TROUBLESHOOTING USING THE PROCESS OF ELIMINATION IS RIGHT ON AND PERFECT. IT INDICATES A BAD AMPLIFIER CHANNEL. I KNOW THIS SOUNDS ODD, AS YOU HAVE TWO OF THESE NOW. IT IS RARE, BUT I HAVE SEEN INPUT CONFIGURATION SWITCHES WIRED BACKWARDS, SO THE ONLY THING LEFT TO DO IS TO HOOK UP THE BAD CHANNEL TO ONE SPEAKER ONLY, BY ITSELF. THEN TAKE ONE RCA ONLY AND PLUG IT INTO ONE RCA INPUT AT A TIME. THEN MOVE THE INPUT SWITCHES AND REPEAT THIS PROCEDURE UNTIL YOU HAVE TRIED ALL SWITCH COMBINATIONS AND ALL INPUT JACKS. WHAT YOU ARE TRYING TO DO AT THIS POINT IS TO DETERMINE IF THERE IS ANY RCA JACK WITH ANY SWITCH POSITION, THAT WILL ALLOW YOU TO GET OUTPUT FROM THAT CHANNEL. IF AFTER THIS TEST, YOU STILL HAVE NO OUTPUT, THEN NO MATTER HOW ODD, IT WOULD INDICATE THAT YOU DO IN FACT HAVE A SECOND DEFECTIVE AMPLIFIER. LET ME KNOW IF YOU NEED FURTHER ASSISTANCE.....V

Ultra Linear... | Answered on Jan 06, 2010 | 108 views


what ohm is it running at? if you have all three hook up it parallel then its to low of ohms and it would be louder if you unhook your 10" sub as it moves differently form the 12"s and it cancels out some bass. but if you want it then you have to change the wiring around a bit. take the positive wire off a 12 and put it on the positive side of the 10 and then take the ground for the 10 and hook it up to the positive side of the 12. so you should have one wire from the amp going to the negative side of the 12 and one going to the positive side of the 10 and a jumper wire from the 10 to the 12. and if it still shuts off then you have bigger problems.

Ultra Linear... | Answered on Sep 25, 2009 | 122 views


Tune the gain on your amplifier powering the sub. Turn the Bass Gain on the amp all the way down and crank up your system to as loud as you can stand. Adjust the bass Gain until the Speaker begins to distort, then back off a little bit. This way you can crank it up and not get Bass Distortion early.

Ultra Linear... | Answered on Sep 16, 2009 | 332 views


The remote wire is supposed to be connected to the remote output on the back of the head unit that is feeding the amp.
Without the remote wire hook up the amp will not turn on.
Reason for this is, the Head Unit tells the AMP to turn on, without the remote connected the AMP is going to do nothing, find the remote switch wire on the back of your Head Unit and run the wire to the remote input on the AMP.

Ultra Linear... | Answered on Sep 16, 2009 | 181 views


its a pretty simple principle...combine 2 speakers, and the ohm load gets cut in half. wire them in a series, and the ohm load doubles. for example, you have 2 subs that are 4 ohms a piece. if you combine both + and both - and put them to the amp, it cucts the load in half bringing it to 2 ohms. or, if you connect 1 + to the other speakers =, then run the remaining pair of wires to the amp, that doubles the load to 8 ohms. youll have to "double-ohm" it for dual voice coil subs. on each sub, you can do the same thing. either combine both + and both = into 1 wire to cut the rated load in half, or wire them in a series to double the load by connecting a + to the other coils =, and using the 2 remaining wires. once you have each sub wired the way you want it, then you can use the same rules when connecting multiple subs, by wiring in a series or parallel. it sounds confusing and its hard for me to put into works, but once you do it a few times its really easy. just remember the 1 rule...wire 2 coils parallel to cut the coils load in half, and wire it in a series to double it. hope it helps.

Ultra Linear... | Answered on Sep 08, 2009 | 89 views


No, open the system, check the switch in questions, get a soldering iron and desolderer to remove the switch, do it carefully, when you have the switch in your hand go to maplins or somewhere like it, find an exact replacement(wont be hard to do) and get someone confident with a soldering iron to solder it back in.

Ultra Linear... | Answered on Sep 02, 2009 | 168 views


your sub/s are drawing to much power adjust the bass boost

Ultra Linear... | Answered on Aug 25, 2009 | 65 views


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 | 490 views


Hello pumpin_up_da,

The most likely cause for the problem you describe is that the remote turn-on lead to the amp is functional only when the head unit is operating in tuner mode. This could be caused by using a power antenna lead instead of a remote lead. Some head units have both, some only one or the other. Check the wire going to the amp remote terminal with a voltmeter. If it shows 12V when the radio is operated in tuner mode but 0V when you switch to CD, then check the wiring. If this is the cause, and your head unit has a dedicated amp turn-on lead, then connect it to the amp terminal. Most head units that have both power antenna and remote leads code them "Blue" and "Blue/White". If your head unit does not have an amp turn-on lead, you need to wire it to a 12V switched source, usually the "red" wire on most aftermarket receivers. You can then put a SPST toggle switch (available at Radio Shack or most auto parts stores) in line with the wire and turn it on and off as desired.

If the correct wire from your head unit is currently connected, then the receiver is defective and needs repair or replacement. Or, if everything else still functions normally, and really don't want to bother with repair or replacement, you can still use the 12V switched source as described above.

Hope this helps.

Ultra Linear... | Answered on Jul 09, 2009 | 240 views

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