Product Detail 400W, 2-way, bi-amplified, optimized active loudspeaker system Ported, bass reflex design for enhanced bass performance Frequency Response (40Hz -20kHz) 24dB/octave crossover at 3kHz 15" high-precision LF driver . The "Tapco Thump TH-15A 15 Two-Way Active SR Loudspeaker" is best product for you. We recommended Tapco Thump TH-15A 15 Two-Way Active SR Loudspeaker