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what wattage are the subs and amp? if your subs are more wattage than your amp, your amp will blow fuses as cant handle the output to your subs. for example. you have 2 500 watt subs and a 300 watt amp, that is no good as amp isnt powerful enough. if you have 2 500 watt subs you need at least a 1200 watt amp to power them both. 200 watt more than the combined wattage of subs as amps should never be turned up to max as they tend to blow and overheat more quickly. 80% volume on amps is reccomended by installers and manufactures.
The size of the wire has more to do with the amp's output than it does with the speakers. The wire should be the same size throughout, from speaker to box, box to amp. A minimum of 16 guage multi-strand wire. Most amps that put out up to 500 watts max or have an RMS rating in the 300 watt range should do fine with this. If you want to be on the safe side, there is no limit to how big your speaker wire can be, only how small or a minimum. If you're using a very high output amp, like over 500 watts RMS, you can use 12 ga. wire. If you want to be on target for your size, I need to know what amp you have and how many speakers you have.
If you like a lot of bass, you definitely need to consider another amp. The SP2X-300 is only rated at 170 watts RMS into 4 ohms mono. That would barely be enough to power one small sub. You do not specify what brand and model your subs are, their impedance, or their power handling capacity. But for any subs, your best power solution is to add together the individual RMS power handling capacity and select a monoblock amp that provides close to the maximum at the impedance they will be wired to present. For example, if your subs are 4 ohms and have a maximum RMS of 250 watts, you would want an amp that outputs abour 500 watts into 2 ohms (2 4 ohm subs wired in parallel = 2 ohm load). An ideal amp in that example would be the Alpine MRP-M500 which outputs 500 watts RMS into 2 ohms.
The amp outputs 500 watts RMS into 4ohms, 750 watts RMS into 2ohms and 1000 RMS into 1ohm.
The L7 can handle 750 watts RMS (375 watts per each coil). If your L7 is the 2ohm version, you should wire the voice coils in series, the positive marked coil to the negative unmarked coil. Then connect the remaining positive and negative to the amp terminals. This gives you a 4ohm load (500 watts). If your L7 is the 4ohm version, wire the voice coils in parallel, both marked and unmarked positives together, likewise both negatives and then to the amp terminals. This gives a 2ohm load (750 watts).
Paralleling the 2ohm sub will result in a 1ohm load (1000 watts) and that is too much for the L7.
I have a background in electronics so i hope i can help. Now after reading this i have the feeling this item does not put out 2000 watts cause if that were the case it should draw somewhere near 147amps. This is because to find out amps you need to take the 2000 watts and divide it by 13.6 volts (assuming what the vehicle runs at) that gives you amps. watts/volts=amps.
Make shure your running thick guage wire like 2-0 guage wire to get correct power to it also and check on amp the ohm's it can handle to make shure your not running to makny ohms.
The answer is yes, any amount of amplifiers can be hooked up to a cap. Obviously the more amps you hook up to it the less you are going to nodice the difference with the same amout of farads. The only thing that I am worried about is the wiring from your battery to your cap. As long as you have a decent gauge wire running back you should have no problem. And for this instance I would recommend 0 guage, you might be able to get away with 4 but I would highly recommend 0. Over all I would recommend 0 guage on all installs unless you are going small and don't plan on upgrading. I hope I could help
-Andrew Hawkins
First of all how many ohm's are each subwoofer rated at . Are the subwoofers dual voice coil or single voice coil. Once I know that I can help you. I think the JL amp is not recommended below a 2ohm load.
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