About: Fi Audio MT12 MT Series 12” 4500W RMS Subwoofer
Due to Popular demand the MT Series is back for good. The MT Series of Fi subwoofers is designed to meet the needs of the serious competitor and and monster basshead. With a massive 4″ voicecoil for increase thermal capacity, we designed the rest of the motor via FEA to optimize the proprietary US steel (water jet and machined in house at Fi when your order is placed). Using three ultra-high grade Y35 magnets, a flux flow derived back plate geometry, and a solid pole with aluminum sleeve and aluminum compression cap, and the famed Omega Coil, there is plenty of thermal capacity in the MT Series. Our Fi designed heavy 5 spider pack coupled with our special 144 tinsel count leadwire to keep the moving assembly under control at extreme excursion levels. The reworked surround geometry on the 12″, 15″, and 18″ models optimizes cone area vs excursion yielding the most output vs excursion. The MT Series is designed for competition use and monster daily driving systems requiring high linearity and extreme power handling. From a punishing low end to the subtle nuances in your favorite reference track, the MT Series delivers!
Thiele/Small parameters:
| Coils | D1/D2 |
| Fs | 34.3 Hz |
| Re | .75/1.49 |
| Qms | 7.93 |
| Qes | 0.38 |
| Qts | 0.37 |
| Mms | 404 g |
| Cms | 5.30 ^-5 |
| Sd | 480 cm^2 |
| Vas | 17.7 l |
| Spl | 84.6 1W/1m |
| Bl | 19.0/26.1 |
| Xmax | 33 mm |
| Rms | 4500W |
Measurements:
Most products include a
limited one year manufacturer’s warranty covering defects in materials and workmanship under normal use.
Warranty coverage does not apply to improper installation, misuse, or damage caused by operation outside
manufacturer specifications.
For complete warranty terms, exclusions, and claim procedures, please visit our full
Warranty Policy page.
Most products include a
limited one year manufacturer’s warranty covering defects in materials and workmanship under normal use.
Warranty coverage does not apply to improper installation, misuse, or damage caused by operation outside
manufacturer specifications.
For complete warranty terms, exclusions, and claim procedures, please visit our full
Warranty Policy page.
Fast shipping across Canada from our Toronto warehouse. Most orders ship within 1–2 business days. Shipping costs and delivery estimates are calculated at checkout. Returns are accepted on eligible items that are unused and in original packaging within our return period. For full details, please view our Shipping Policy and Returns & Exchanges Policy.
Please note that final sale, clearance, open-box, and refurbished items are not eligible for returns or refunds. These items may only be covered under their respective warranty or exchange terms where applicable. For full details regarding open-box items, please review our Open Box Policy.
On orders over $200*
Competitive pricing you can trust
Most orders ship within 24 hours
With Sezzle and Afterpay