The Boschmann XLR-4439S is a 2-way coaxial acoustic system from the XLR series, manufactured by BM Audio Laboratories.

This 100mm (4 inch) speaker has a nominal power of 100 W, a maximum power of 200 W, and an impedance of 4 Ohm. It operates within a frequency range of 70 to 23000 Hz with a sensitivity of 90 dB.

The construction features a grey moisture-resistant plastic woofer diaphragm, an aluminum dome tweeter, and a heat-resistant Kapton voice coil.

The set includes cables, mounting materials, and speaker grilles for installation in vehicle audio systems.