The TNA-2800SA Active subwoofer features two HH designed 18" low frequency woofers with exceptionally high output. Equipped with integrated rigging hardware, the TNA-2800SA can be installed quickly and easily. The TNA-2800SA offers a max SPL of 144 dB and offers a frequency response as low as 32Hz. The TNA-2800SA offers an ideal venue installation or point source solution.