2/4 Channel Common Features • Sloping End Caps • MOSFET Power Supply Transistors • Pulse Width Modulation Circutry • The-way Protection Circuitry • 2-ohm Stereo, 4-ohm Bridged Stable • Tri-Mode Capable • Selectable Crossovers (HPF/Full/LPF) • 200mV-8V Low Level Inputs • Pre-Amp Outputs • Dash Mount Remote Gain Control (2 ch. models) • Variable 12dB 30-500Hz LPF (2 ch. models)

• Variable 12 dB 40-250Hz LPF (4 ch. models) • Variable 12 dB 50-500Hz HPF (2 ch. models) • Variable 12 dB 40-250Hz HPF (4 ch. models) • Variable 0-24dB Bass Boost (2 ch. models) • Variable 0-18dB Bass Boost (4 ch. models) • Variable 12 dB 30-175Hz Subsonic Filter (2 ch. models) • Frequency Response: 10Hz - 30kHz • Signal-to-Noise Ratio: 97dB • Total Harmonic Distortion: .02% • 4 ga. Power & 8 ga. Speaker Terminals

Class D Common Features • Jet Black Finish w/ Diamond Cut Heatsink • Hi-Speed Digital Circuitry • Regulated PWM Power Supply • Three-way Protection Circuitry • 1-ohm Stable • Bridged Synchronization • 200mV-8V Low Level Inputs • Pre-Amp Outputs • Dash Mount Remote Gain Control

• Variable 40-200Hz LPF • Variable 30-175Hz Subsonic Filter • Variable 0-18dB 45Hz Bass Boost • Frequency Response: 15-150Hz • Signal-to-Noise Ratio: 100dB • Total Harmonic Distortion: .5% • 1800 Phase Switch • Direct Input 4 ga. Power & 8 ga. Speaker Terminals • Direct Input 0 ga. Power Terminal (PH1-5500D)