Designed for players who need extended bottom end, the 1528 enclosure features two 15" drivers tuned down to 32Hz, making it perfect for 5-string players. The 1528 has an inherent natural boost in the 80Hz to 160Hz range, which really brings out the bass in a live mix. Pairing the 1528 with the standard 1028H enclosure maximizes the full-range sound and amplifier output.