The DBH subwoofer is a Danley take on a conventional design. The DBH subs feature a front loaded, folded horn design. The DBH subs behave conventionally in that adding boxes together not only increases the output, but extends the low frequency response downward. The DBH family of subs are most efficient in the 80 Hz range. Subjectively, the DBH subs are “punchy”, and are right at home with high powered rock and roll!