What Do Car Audio Subwoofer Frequency Response Specs Tell Us?
Subwoofer equalization
Woofer measurements
Product Review
The Subwoofer DIY Page - Car Audio
What are the frequency settings for a subwoofer? I have a subwoofer with 4 different frequency settings. I need powerful, punchy bass. Should the setting be positive or negative? - Quora
What About All Those Speaker Specs? | B&H eXplora
Understanding Speaker Frequency Response - AudioReputation