The GT Series High-Performance Amplifiers are designed for a new generation of sound. These ultra-efficient, super compact amplifiers are designed with Massive Audio’s exclusive "Massive Core" which adds tons of headroom for clean, undistorted, pure sound. The "Massive Core" power supply with oversized toroids and transformers delivers plenty of current to drive even the most demanding woofers and speakers. Top-quality parts and construction ensure years of reliable, trouble-free service. Four-layered circuit boards, with surface-mount computer-assembled parts, are tested as they are placed on the board, to help optimize the signal paths and minimize the need for point-to-point wiring while keeping the board temperature even for more predictable operations. Manuals & Downloads GT / GTR AMPLIFIER MANUAL FEATURES 2 Ohm Stable Class D Digital Design Mil-Spec Multi-Layer PCB with SMD Parts Built-In Noise Reduction Circuitry Full MOSFET with High-Grade / High-Speed Switching Built-In Auto Sensing Turn-On via RCA Inputs 12V Remove Output for External Devices (when Hi-Level is used.) Next-Generation Advanced 5-Way Protection Circuitry World Wide Standard Compliant 4 AWG Recommended Input Clip LED Indicator SPECIFICATIONS 2 Ohm RMS 200w x 4 4 Ohm RMS 120w x 4 4 Ohm Bridged 430w x 2 Input Level 310mV ~ 7V Freq. Response 10Hz ~ 31KHz Low Pass Freq. 20Hz ~ 3KHz Channel Separation 55dB THD at 4 Ohm 0.08% S/N Ratio 91dB Bass Boost N/A Minimum Load 2 Ohm Gain Remote n/a Dimensions 5.9 (in) x 2.16 (in) x 7 (in)