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MTX Thunder 3401 Car Audio Amplifier - Page 3 Questions & Answers
81000d missing resistor
you need the resisitor, it keeps the machine from basically frying up in case of a power surge.,
I have a mtx thunder 7801 series amplifier well i got a stereo from someone and i didnt know it a the time but it had the wrong plug in the back of it so when i hooked my amp up to it what i thought w
The short answer is probably yes... easily, probably no. If you are lucky and only have one or two shorted transistors, then you can cut the leads on those and see if it powers up without blowing a fuse. Also check for shorted diodes and burnt resistors. If all FETs (or most of) the FETs mounted to the heat sink are shorted then it is probably not worth taking the chance putting the time and money into fixing it, just to have it smoke again. Also they are likely in parallel so it is a little more difficult to determine the bad one as they may not all be bad. Measure with an ohmmeter and find the one with the lowest resistance and remove that first and keep going until you believe you have gotten them all. Normally repairs like this are not for someone with little or no experience on amp repair, but if you feel like taking it on, good luck!
I have 2 different subs in one box, a 12" MTX
im guessing both speakers are 4 ohms ..mtx 4ohms and kicker dual 4ohms..now if your amp can go down to 1 ohm wiring the kicker dual coils in parallel (2ohms) and the mtx connected together (4ohms) should leave you with a final impedance between 1 and 2 ohms ...i suggest you use one or get another
MTX tna251
I have the same sub combo. The problem is the amp is underpowered for the 2 MTX 12s, get a bigger amp and you should be fine.
I recently purchased the mtx
If none of the lights are coming on for the amp then the amp is not getting power and/or ground. Check the connections. Check the fuses. Or the amp is no good.
Tryin to hook up a
Your basic crossover is going to have a power (+) and ground (-). Your power wire goes to the battery, and your ground goes to the frame. You will need to hook up your RCA or speaker wires to the input side. Then hook the other two RCA connections to your amp.
Im trying to figure out
Use a volt meter to check the power going to the amp. without disconnecting the wires, put the leads on the + and - terminals. you should be getting at least 10V but hopefully closer to 14V.If not, check it is properly grounded and good connection at the battery. Next check the speakers. use an Ohm meter to check the Ohm load. disconnect from the amp and check they are not below 2 ohms (although 4 is better).
plaese rate if this was helpful!
I have a mtx audio
yes, the amp can be used fof full range speakers. to use it a s such, the amp's "crossover" switch must be set to "off" (could also be labeled as "full-range" or "defeat").
the amp is 2 channel. 4 channel is for surround sound or to have independent front and rear channels/volumes. this 2 channel amp will support 4 speakers, but you wont be able to balance from front to back- the front and back speakers will be at the same volume all the time if both are hooked up to the amp.
I've had this problem with
I can't be sure but it sounds like the battery just can't supply enough current while the car is starting, which is not unreasonable as the current load to start the car is quite high. I can only suggest fitting a capacitor as near to the unit's supply as possible or fitting a much uprated battery.(Batteries also lose the capacity to provide high current as they age, how old is the battery?)
I thought the fitting a capacitor was more or less standard in high power installations these days?
My amp will not turn
Using a multimeter, check the power going to the amplifier for around 12 volts, and check the remote wire for anywhere from 3 to 12 volts. If power is getting to the amplifier and the remote wire is signalling the amp to turn on, check the fuse/s on the amplifier. If the fuse is not blown, have the amplifier checked out by a stereo shop or send it to the manufacturer for warranty repairs. I’m happy to help further over the phone at
https://www.6ya.com/expert/jeremy_69f3cc28d95bf514
My amp i just instaled
Check your remote wire on both the deck and amp...
If the remote wire is loose it will turn the amp on and off constantly...
Also check to make sure that the fuses on the amp it self are properly seated.
No sound
Make sure rca cables are tight at the amp and head unit, if you didn't put the sub in the box yourself or buy a retailer.. check the connections yourself. if it's an old amp it may be burnt up. some head units these days require you to turn the sub on (especialy alpine) really need more info on what you got and how old it is.
I have a mtx thunder 7801 and a sledge hammer box
Sounds like the subs are blown with the voicecoils fused together which means the amp is/was seeing a dead short ( zero Ohms reisitence) not good for any amp. Disconnect the speaker terminals from the amp and see if it turns on. The funny smell might have been the subs blowing up, i'll keep my fingers crossed for you.
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