The Zapco ST-6X DSP III is a 6-channel full-range Class A/B amplifier designed to provide precise control and powerful output for high-fidelity car audio systems. It integrates a full-function 8-channel digital signal processor, allowing you to fine-tune your sound using high-pass and low-pass filters, phase control, and signal delay. For those seeking meticulous acoustic calibration, each channel features 15 bands of parametric equalization to correct cabin acoustics. This unit delivers 100 watts per channel at 4 ohms, which increases to 130 watts at 2 ohms, or can be bridged to provide 250 watts across three channels at 4 ohms. The audio quality is maintained by a frequency response ranging from 15Hz to 30KHz and a signal-to-noise ratio exceeding 90dB. To keep the signal clean, it includes an optical digital input and analog input gain controls. Measuring 160 by 57 by 475 mm, the amplifier fits into various installation spaces while housing its robust internal components. You can expand its functionality by adding the optional HD-BT II-D Bluetooth module via the dedicated APTX HD port, which enables wireless music streaming and tuning through a mobile app. This makes it a versatile choice for enthusiasts who want a single device to handle both amplification and complex signal processing.