The 81FIND is an excellent mid-bass driver. Designed for the best usage in the two-way speaker systems, or systems designed with multiple woofers. It provides you with very high efficiency possibilitites (96 dB 1watt / 1 meter). Our engineers have designed the cone and the suspension system to have min-imum harmonic distortion artifacts, using our own paper pulp blend and Nomex spider. The 81FIND has very linear frequency response characteristics, making it ideal for simpler passive crossover designs. It also provides you with high power handling capability.