Zapco HB 48II 4A DSP Amp 8 Channel DSP 4 Channel Class A/B Power AmplifierHB 48 II 4A Integrated 8 Ch. DSP 4 Ch. Class AB Amplifier The HB 48 II 4A is 8 Channels DSP with 31 bands EQ and integrated 4 Channels Class AB Amplifier. It has 4 Channels High Level inputs and 8 Channels RCA outputs, plus 2 Channels RCA inputs. 8 Ch. DSP (31 bands EQ) 4 Ch. High Level Inputs 2 Ch. RCA Inputs + 8 Ch. RCA Outputs Plug & Play ready BT 5. 1 streaming OTG Input Music Player (MP2. 3. 4, WMA, APE, FLAC, AAC, M4A, WAV, AIF, AIFC) PC and