SEAS Excel W12CY/001 - E0021-08S 4.5" Magnesium Cone Woofer

The SEAS Excel W12CY/001, also known as the E0021-08S, is a 4.5-inch magnesium cone woofer that sets a benchmark for precision in low-frequency reproduction. As part of the prestigious SEAS Excel series, this driver is engineered for audiophiles and custom loudspeaker builders who demand exceptional clarity and control in their designs. Its primary application lies in high-fidelity two-way or three-way systems, where it excels as a dedicated mid-bass or bass-midrange unit, delivering articulate and punchy performance that brings music to life.

At the heart of this woofer is a lightweight yet exceptionally rigid magnesium cone, which minimises break-up modes and ensures low distortion even at high output levels. The motor system is equally refined, featuring a low inductance of 0.43 mH for improved high-frequency extension and reduced intermodulation distortion. With a total Q factor (Qts) of 0.36, it is ideally suited for sealed or vented enclosures, offering tight, controlled bass. The 5.6-ohm DC resistance and 84 dB sensitivity (2.83V/1m) allow for efficient power handling, while the 3 mm linear excursion (Xmax) provides ample headroom for dynamic passages. Mechanically, the driver boasts a Qms of 2.5 and Qes of 0.42, reflecting a well-damped suspension and efficient electromagnetic control. The 114.3 mm nominal diameter fits a 99.1 mm cut-out, secured by six mounting holes on a 110.7 mm bolt circle, with a total depth of 71.4 mm. This woofer is a testament to SEAS’s commitment to sonic excellence, offering a transparent and engaging listening experience for discerning enthusiasts.