Yes. Most head units only put out about 15-20 watts RMS, you need more than that to properly power a subwoofer. Ignore peak ratings, only use RMS ratings to match everything together.
you need an amp and an amp wiring kit
First you will absolutely need an amp to power any subwoofers. Nowadays subwoofers come along with amp..& normally one 1200watt subwoofer decrease your car battery lifetime to 2-4 month
To power your speakers, and to ensure that your amp has enough power to power your subwoofers, you would need at least an amp of 750 watts true power.
you need an amplifier first. decide where you want the amp, and wire it to that point. (amp comes with instructions for the wiring) once the amp is wired in, wire it to the radio(instructions come with amp) and screw it in. then locate where you want the sub(s) and wire it to that from the amp. almost all your instructions for installing subwoofers comes with the amp.
Yes
Well, if they share a box, then you will need to make sure that your amp RCA's are connected to the back of your CD players auxillary ports. Then you will need to run the power wire from your amp to the battery, and you will need to find a nice ground on your from somewhere. Then connect your remote wire. After all that, you will need to connect your box, or boxes, to the amp. In which case, you will need to make sure that you have the positive and negative for the amp and the speakers alligned right. DO NOT BRIDGE UNLESS YOUR SPEAKERS SAY THAT THEY ARE CAPABLE. I cannot stress that enough. Anyway, that's about it.
To run two subwoofers from a monoblock amplifier, you need to ensure they are wired correctly for optimal performance. First, check the impedance of your subwoofers; if they are dual voice coil (DVC), you can wire them in series or parallel depending on your amp's specifications. For series wiring, connect the positive terminal of the first sub to the positive of the amp, and the negative terminal of that sub to the positive terminal of the second sub, then connect the negative terminal of the second sub to the amp's negative terminal. For parallel wiring, connect both positives to the amp's positive and both negatives to the amp's negative, making sure the total impedance doesn’t drop below what the amp can handle.
Memphis Street Refrence 1.500 best amp for the subs
either your amp has a short..... or.... you have a bad ground
you now need an amp that will power them both and a wireing kit and a box or 2 to put them in and a place to put them.
jut an amp wirering kit a wirering harness for a 09 sonata and a dash insert for 09 sonata.
Yes, you can run four Kicker CVR 4-ohm subwoofers with one amplifier, but you need to ensure that the amplifier can handle the total impedance load. If you wire the four 4-ohm subs in parallel, the total impedance would drop to 1 ohm, so you'll need an amp that is stable at 1 ohm and has enough power to drive all four subs effectively. Make sure to check the amp's power rating and match it with the subs' power handling to avoid damage.