I have mp435u ihave a 1200 w crunch running my subs and i have another 1000 w crunch running 2 300 w kenwood 6 by9 and 2 tweets 250 w from low 2 alittle less than half way it sounds great any thing higher my highs cut out and it seems to be getting worse it never happened till about 10 months in i thought it was the amp i started with a 440 then a n 800 w now the crunch is it the head unit maybe the built in eq can it be fixed
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you can run 2 subs given that you dont go over 2 ohms of resistance and that the subs are rated at 1000 watt max each around 4 or 500 watt rms. if your not sure about ohms dont bridge it and get single voice coil subs. this amp is capable of about 700watts constant power 1200 max spike if the voltage stays at 12 or higher.
I believe what your trying to do is to run 2 12" subs and some other satillite speakers? We used to do that all the time.. That is called running the amp in "mixed mono" that's where the mids & tweets are run in stereo while the subs are bridged mono. This configuration is what made Rockford Fosgate "The Bomb" back in the day. To do what you want your subs have got to be 8 ohms, NOT 4, Dual Voice Coil 4 ohms would be OK. Before i tell you how it can be done let me tell you what will happen... For one thing you will be "making" your own cross overs for the subs and mids and tweets. Forget about using the cross overs on the amp. 2ndly you will lose about 1/3 to 1/2 of the amps power because the crossovers are so inefficient, so don't even think your going to get anywhere near 1200 watts from the amp. More like 300, and that's on a good day. But if you still want to do it you go to your Radio Shack and get 1ea 6.0 mHy (milhenry) coil and two 47 mfd (microfared) capacitors, or something close to that value. So you would wire your mids & tweets normal in stereo and on the + line to each mid wire in the 47 mfd capacitor. That is your h/p crossover which will crossover your mids @ appx 130hz. Now on your subs. You want to wire them in parellel (both +s twisted together and both -s twisted together so it looks like there is just one woofer with a + and a -) Than from the L+ of the amp run a wire to the coil and from the coil to the + of the woofers, than using the R- of the amp to the -s of the woofers. Do not use any of the amps built in crossovers leave it on full. Good luck. Mark @ Sounds Good to Me Tempe, AZ
1. your charging system is your only limitation for watts but you can add plenty without upgrading it. i'd say 1,000 watts max on the stock batter and alternator with large power and ground cables of at least 4 gauge.
2. yes. using your subwoofer rca outputs.
3. for a subwoofer you should always ad an amp. i'd say a 3-400 watt amp is fine to match up with you kenwood speakers. you will need a small sub to fit in there or maybe one slim enclosure behind each seat with slim 8" subs
did you plug your rca signal wires into the subwoofer ouput rca's? if so you can control the level and frequency of the sub on the face in the audio menu. if this is not the issue try new rca cables. you can run them outside the car first just to test. another issue is make sure you have proper grounding on the head unit and amp. also if your rca cables acccidently touch power they can blow a fuse or trace inside the radio causing the rca's to lose ground (you will have low audio with lots of humming noise). you can check this by jumpering a small wire from the radio frame to the outer shield of the rca jack while it is all plugged in. if the sound gets louder and cleaner you can secure this wire in place by soldering it or fixing the circuit board itself.
try to look at the connection on the back of the cd player and make sure that the amp power wire is connected to the power wire on the wire harness on the back of the cd player and that should work but i only need one amp for a pair of 6by9s and subs try to bridge the speakers all to one amp that should cause it to sta on while in cd mode hope that helps