My 12W3v2-D2 sounded VERY bad in my accord, but it wasn't the sub causing the problem. I'm not sure of the exact dimensions of my box offhand, but I know it was within the size range recommended by JL. The sub was a 12W3 with dual 2 ohm voice coils. I had them wired in series, creating a 4 ohm load. I had a Rockford Fosgate Punch 200S amplifier which is advertised at 200Wx1 @ 4ohms, but the certification inside the box said the actual tested power output was 265W RMS @ 4 ohms.

This was my first time using line level inputs. In my previous car, I had to use a RCA converter box since my amp didn't have line level inputs, and that sounded great! (JL 12W1 powered by a Rockford Fosgate Punch 40ix)

The sub wasn't bad, because my brother hooked it up to a Sony headunit (using the RCA inputs of his amp) and it sounds great. In my case, the sound was awful! I tried experimenting with all different settings, adjusting the high and low gains on the amp, and adjusting the bass on the headunit, and no matter what I tried I couldn't get it to sound good.

I assumed that the Honda headunit was less than perfect and gave up on the whole thing, since I'm not ready to install an aftermarket headunit. My brother told me that the line level inputs on the amps aren't good to use and a separate RCA converter box is much better. I didn't get to try this out.


On a related topic, my rear speakers in my car (03 Accord LX 4cyl coupe) sound awful! If I have the bass set anywhere above 0 and the song has heavy bass the back speakers rattle like crazy. I mentioned this to the dealer and they replaced them, but the problem didn't go away. I went to another dealer and mentioned the problem and they told me that there was nothing wrong and I just had the bass set too high, and the other cars on their lot do the same. They even had the balls to write on the service report "Tested customer's HOMEMADE CD and determined that music has too much bass." What would it matter if my CD was an original or a burned copy? Are these fools aware that it's a DIGITAL copy which is exactly like the original?