Brand new alpine subs sound extremely quiet. The amp is very small but was powering similar watts subs much louder at the same output level. I'm breaking them in but I feel
Alpine R-A75M Car Audio Type R Series Amp 1 Channel Class D Subwoofer Amplifier – パーソナルスタイリスト・イメージコンサルタント資格スクール東京|MODA
Amazon.com: Universal Car Stereo Single 12" Alpine Type S S-W12D4 Bundle with Rearfire Sealed Sub Box Enclosure with S-A60M Amplifier & 4GA Amp Kit : Electronics
SUB/AMP combo - Page 1 - Mad Soundz
Alpine R-A75M Car Audio Type R Series Amp 1 Channel Class D Subwoofer Amplifier – パーソナルスタイリスト・イメージコンサルタント資格スクール東京|MODA