... .Application:Permanently installed entertainment concert halls, multi purpose hall, performing arts center, lounge bar, KTV, nightclubs, etc. Dual featured DSP ... Hi-Shelf. A, adjustable parameters in the Parameter Status : center frequency : 20Hz-20KHz, a total of 239 frequency points ... adjustable in Lo-Shelf and Hi-Shelf status parameters: center frequency : 20Hz-20KHz, a total of 239 frequency ...