PreSonus Sceptre S8 CoActual Studio Monitor combines an 8-inch lowmid-frequency driver and a 1-inch (25 mm), horn-loaded, high-frequency transducer into a single coaxial unit with aligned voice coils. Sceptre has an internal power supply and a blue power-indicator LED. The Sceptre S8 has a balanced XLR and a 14 TRS line-level input with an A-taper level control. Features CoActual technology combines DSP time-correction and point-source design for symmetrical soundstage and micro-definition imaging Unique coaxial transducer integrates 8-inch (Sceptre S8) or 6.5-inch (Sceptre S6) midrange driver and 1-inch (25 mm), horn-loaded HF transducer with Coaxial Speaker Coherence Alignment Powerful DSP provides critical Temporal Equalization with multiple FIR filters Acoustic-tuning controls HF Driver Adjust (0 dB, 1 dB, -1.5 dB, -4 dB) Acoustic Space settings (0 dB, -1.5 dB, -3 dB, -6