A friend of mine has a legacy amp i think its the 4000 watt version and
has 8 gauge running to it with 2 12 in cadence super tx subs and the
subs are bridged to 4 ohm on the amp and the amp will shut off all of a
sudden when he changes songs or just in the middle of the song any ideas
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Re: amp is randomally shutting off
If the amp shuts down with no pattern, you need to measure the DC voltage on the power terminals.
With your multimeter set to DC volts, the black meter lead on the ground terminal of the amp (not on the point where the ground wire connected to the vehicle) and the head unit on (so the amp will have remote voltage applied), touch the red lead alternately to the B+ and remote terminals of the amp. If the voltage is below ~11 volts, you need to check the wiring feeding whichever line is too low.
Since there is no pattern, you will have to watch the meter for a while so you can see the meter drop when the amp shuts off. If the meter never drops on either the remote or B+ terminals (when the amp shuts off), the amp may have an internal fault.
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the Q4000 only funs 400 max and thats at 4ohms bridged 2x200 if you need high powered amps i would look at soundstream or MTX and you would need atleast 1 secondary battery cause to max a amp out you need to have constant 14.4 volts going to power the amp.
You need to get another amp for your sub. I would say if you want good quality go for MTX because I have had amps from MTX and never had a problem. what you need to know is look at the fuses on the amp if there are 3 of the 25 amp fuses on there then it should push out about 750 watts but on MTX they under clock the amp so it will push about 800 at 14.4 volts for that you will need a 4 gauge wiring kit with a 60 amp fuse in the fuse link. As far as your other amp hook up the speakers and tweeters to that but be sure to tune in down and you would need a 8 gauge wiring kit. I hope this helps you.
i go with the diamond d6 1200.1 for surejust make sure you can get those subs in 1ohm and if you want a 1200 watt class d id look in to planet audio they make real good amp for for half the price of that one
run them straight and dont use the cross over. One speak on right channel and the other on other channel. Then turn up amp settings 7/8 the way up and control the rest from your dvd/cd player. I recommend some monster cable which is very thick. Ground the amp directly to trunk bolts but make sure to scrape the paint off or the connection will be bad. You can also use a cap which will send battery pulses to amp much quicker.
All amps aren't created equal. More exspense amps put out "cleaner" power. You need to know what the RMS power rating is for the amp at 8 ohms and 4 ohms. Also, is the speaker an 8 or 4 ohm speaker? How you wire a speaker or speakers (series or paralell) can change the ohms (resistence) which will change the power put out of the amp. Also, I'm assuming you are setting it up in mono?
If you had 4 single voice coil speakers you can create either of those 2 ohm or 4 ohm setups. If you run 2 of them in parallel you will get the 4 ohms. If you run 4 of them in parallel you will get the 2 ohms. In parallel I mean that you connect the positives together and run them to the positive on the amp and the connect the negatives together and run them to the negative on the amp. Let me know if you need more help. Good Luck.
If what you're telling me is correct you're trying to drive a stereo sub -woofer with a mono amplifier. If so, that could be a bad situation for the amp, if the voice coils are not wired together correctly. Before we go too far, I have some questions I need answered. 1. Is the MA unit an M1889i? 2. Do you have the 4 terminals of sub-woofer tied together. For example the 2 positive terminals are tied together & the 2 negative terminals are tied together? 3.How do you supply 12VDC to the amp?
While I'm waiting to hear back from you, I'll try to draw a schematic (wiring diagram) of the way it should be wired for your particular setup that I'll send to you.