We’ve introduced our HP series to satisfy the needs of customers with larger rooms and those who want greater bass impact. Our HP subs offer two advantages when compared to our other subs. The first is 2 dB higher output. At bass frequencies, every 6 to 10 dB increase sounds twice as loud (the actual number varies with listeners). So the 2 dB increase with our HP series will sound around one third louder. The second benefit is an increase in perceived authority and impact. When a subwoofer amplifier reaches it’s limits, clipping occurs. This tends to reduce the dynamics and authority of the sound. Our HP subs can play cleanly where our other subs are operating at their limits. The difference is felt as much as it is heard.