I just bought a 12 JL W6 and my buddie was letting me borrowed his kenwood amp for the time being. well i noticed that the sub sounded funny and not like most other subs.so i figured the amp might not be strong enough for the sub. so then i bought a spl gorilla series 3000 watt amp. hooked it all up and it still sounded the same. it sounds as if theres not enough power and seemed to be missing beats. i mean the sub hits hard but it sounds like the bass is being cut off or so. it doesnt have that solid bass that follows through. i checked everything and i have no ideal as to what it is. could it be a weak battery?

SOURCE: problem when hooking two 12 inch subs to one amp

the amp is no where near strong enough that sound you hear is called hard clipping and it will destroy your subs in minutes. depending on what model JL subs you have I can sell you a better amp.

SOURCE: The subs aren't pushing out bass.

Hello crobins2,

The Kenwood KAC-6202 2-channel is only rated for 60 watts RMS per channel into a 4 ohm load. That just isn't much power for a pair of 12" subs. Even the bridged output is only 200 watts into 4 ohms, still at the low end for a sub, much less to share between a pair of subs.

Assuming that your subs are 4 ohm, you could probably get more sound by driving just one of them on the bridged terminals. But to get the best power with what you have, connect one sub to each channel, set the filter switch to the far right (LPF), set the operation switch to stereo (both channels driven), set the filter frequency (Hz) to 100 or lower, and adjust the input sensitivity as far clockwise as possible without causing distortion.

But, to do the subs justice, you really need at least 300-400 watts to share between them.

Hope this helps.

SOURCE: why my jl audio 1400d amplifier stays in protective mode?

Check for a speaker wire that come come of , Or a loose grond wire on the amp or where ever you have the ground wire connected two,