The LM-2/3 is a cost effective power amplifier representing the state-of-the-art in professional quality performance. It is optimized to deliver high levels of sustained power, extraordinary audio performance, and road-proven reliability. The LM-2/3 is a "Heavy Duty" models specially designed to work as hard into 2 ohm as most. With 3 TIERS power rails, Class H design, the amplifier work in extremely high efficiency because of less current consumption and heat dissipation FEATURES Ø High-current toroidal transformers for greater 2 ohm power and low noise Ø Selectable input sensitivity in voltage 0.775V rms, 1.0V rms and 1.4V rms Ø Switch for sub sonic filter 30Hz and below Ø Switch for Earth link (on and off) Ø Comprehensives Signal (SIG), CLIP (CLIP), Protect (PRO) and PAR/BRG (Parallel/Bridged) indicators to monitor amplifier working status. Ø All signal inputs and outputs are on XLR male & female (2x XLR male & 2x XLR female) Ø Binding post and Speakon outputs SPECIFICATIONS STEREO MODE LM-3 LM-2 8ohms (RMS/THD 1%) 1300Wx2 1000Wx2 4ohms (RMS/THD 1%) 2000Wx2 1700Wx2 2ohms 2200Wx2 1800Wx2 BRIDGE MONO MODE 　 　 8ohms 4000W 3500W 4ohms n/a n/a 　 　 　 Signal to Noise >95dB Input Sensitivity 0.775Vrms/1.0Vrms/1.4Vrms Gain @ 8homs 38dB Output Circuitry 3-Tier Class H Distortion Less than 0.02% Frequency Response 20Hz-20KHz @ 8ohms ±0.5dB Damping Factor (@100Hz) >300 Input Impedance Balanced 20K/ Unbalanced 10K Switching Rate >20V/us High Filter 30Hz at -3dB Cooling Variable-speed fan, rear-to-front air flow Input Connectors, each channel XLR male & female Output Connectors, each channel speakon and binding posts Rear Panel Swithches Input Configuration: Bridge/Stereo/Parallel 　 Input sensitivity:0.755Vrms,1.0VRMS and 1.4Vrms 　 Sub sonic filter: 30Hz and below 　 Earth link: on/off Front Panel Controls Gain Attenuator: 0 to ∞ dB Power On/Off Front Panel Indicators Signal (SIG), CLIP (CLIP), Protect (PRO) and PAR/BRG (Parallel/Bridged) 　 Power STY/on Protection 　 　 Amplifier Protection Full short circuit, thermal, infrasonic, ultrasonic,VHF,vol.gain gradually Load Protection DC fault power supply,switching power supply under voltage, Infrasonic -3 dB, 5 Hz DC fault Power supply shutdown Ultrasonic -3 dB, 85 kHz Short Circuits active clip limiting, recover after limiting Thermal no output at 95°C, re-work less than 95°C Over Current auto limit PHYSICAL 　 　 SHIPPING WEIGHT (kgs) 29.6KG 28.7KG SHIPPING SIZE ( WxDxH mm) 575x605x210