Dynamic prosessor speaker management Phaselab Fir4800 4in 8out. Featuring DSP process with 96k 24bit sampling rate, gain control, PEQ, Xover, limiter, delay, and support for HPF and LPF with Butterworth/Bessel/Linkwitz-Riley. Control via USB or RS232 with a user-friendly GUI for Windows 8/10/11. This versatile device also supports FIR linear phase setting with 1024 Taps input or 512 Taps output.