Dayton Audio Odeum Apollo 12MB400N-8 Bass-midwoofer

The Odeum Apollo 12MB400N-8 Bass-midwoofer from Dayton Audio is a high-performance driver engineered to deliver exceptional clarity and authority across the bass and midrange frequencies. This 12-inch transducer is the ideal choice for audiophiles and DIY enthusiasts seeking to build or upgrade loudspeaker systems, from two-way designs to dedicated subwoofer enclosures. Its robust construction and carefully optimised parameters make it equally suited for home hi-fi, professional monitoring, or custom car audio installations where accurate, dynamic reproduction is paramount.

At the heart of this driver lies a treated paper cone, chosen for its natural damping properties and ability to produce a warm, articulate sound with minimal coloration. The copper voice coil, with a DC resistance of 7.5 ohms and an inductance of just 1.21 mH, ensures efficient power handling and controlled transient response. With an impressive sensitivity of 96.6 dB (1m/2.83V) and a total Q factor of 0.26, the Apollo 12MB400N-8 offers a perfect balance between low-frequency extension and tight, punchy output. The 6.75 mm linear excursion (Xmax) allows for high output levels with low distortion, while the 8-hole mounting pattern and 291.8 mm cutout diameter simplify integration into standard enclosures. Whether you are designing a sealed or ported cabinet, this driver’s low Qes (0.27) and high Qms (7.75) provide the flexibility to achieve outstanding performance in a variety of acoustic environments.