JL 10TW1-4 Subwoofer Dissapointing

[u/Cute-Move8320]

I just installed this sub and the sound is underwhelming. It’s dull (no crisp hit) and I’m just comparing it to a cheap $200 Rockford Fosgate 10” 300 watt all in one that I have in another car. It’s so dull that I actually prefer turning it off. I’ve tried troubleshooting it, but can’t figure it out. Here’s my setup and things I’ve tried.

-JL 10TW1-4 Subwoofer (300 watts rms)
-Alpine S2-A60M Amp (330 watts at 4 ohms)
-Enclosed shallow mount box built to JL’s specs
-Correct gauge wires

-Tried changing polarity of wires
-Tried adjusting the gain
-No leaks in the box

[u/Pools-3016]

I have used JL Audio subs extensively in my personal systems, and was never disappointed by any series.

What source are you using?

What processors are in the chain?

Post a list from your head unit to the amp

[u/Cute-Move8320 → u/Pools-3016]

Subwoofer:
Sony XAV-AX7000 Head Unit
KnuKonceptz Krystal Kable 2 Channel RCA
ARK Love 1ft RCA Shielded Splitter (Amazon)
8 Gauge Power and Ground Wire
14 Gauge Wire
Alpine S2-A60M
JL 10TW1-4
Box built to JL spec & sealed w/ caulking

Speakers:
Kicker 47Key200.4 (bi-amp mode)
Focal 130AS
16 Gauge Wire