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Measured at small signal levels per AES standards
Parameters measured per AES2-1984 (r2003) standards. Small-signal parameters valid within linear operating region.
What do Fs, Qts, Vas, and Xmax mean?
Thiele-Small ParametersUpdated 1/27/2026
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The Rockford Fosgate t1d412 Power Series T1 12" Dual 4-Ohm Subwoofer is a car audio subwoofer made by Rockford Fosgate. View full specifications and where to buy on this page.
The Rockford Fosgate t1d412 Power Series T1 12" Dual 4-Ohm Subwoofer typically sells for around $360 depending on the retailer and variant. Check the "Where to Buy" section for current pricing from authorized dealers.
You can purchase the Rockford Fosgate t1d412 Power Series T1 12" Dual 4-Ohm Subwoofer from authorized dealers listed in the "Where to Buy" section on this page. We recommend buying from authorized retailers to ensure warranty coverage and genuine products.
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