The M Series Power Amplifier is a new developed model that achieves a compact size with D-class movement that pursues natural sound. The Final Dividers of the Power Amplifier feature a D-class amplifier composed of MOS-FET. The M-ONE 1ch has 4 para connection, M-SIX is a powerful speaker drive with 2 para connections. The switching device on the power supply is a 2-parallel drive of MOS-FET and is combined with a large troidal transformer high-capacity electrolytic capacitor to create a powerful power supply. (M-ONE / M-FOUR) M-SIX uses MOS-FET 3-parallel drive super strong power supply. Convenient built-in crossover High Pass or Low Pass (band pass) can be set between high pass 15 - 4 KHz / low pass 40 - 4 KHz and M-FOUR / M-SIX is compatible with 2-way multi-system etc. (The band pass can be used for M-FOUR 3ch/4ch/M-SIX 3ch/4ch/5ch/6ch) M-ONE/M-FOUR models support high level input and connect speakers output to factory decks. Equipped with newly developed ADEP circuitry to prevent error detection during light load of genuine head units. It greatly eliminates the hassle of connecting dummy resistors, etc. The operating power supply voltage is 10.6 V - 16.0 V, and the power supply will not turn off even if the power voltage is low for 5 seconds / 6 V. Prevents the sound loss of idling stop vehicles beforehand. Protection (except H/Us and other signal source side loss) works with high-speed protection in case of abnormalities such as thermal, overload, or short-circuit. The HELIX logo illumination on the top panel will light up white for a gorgeous look. [Features] Compact size (W x H x D): 12.6 x 2.0 x 6.1 inches (320 x 50 x 154 mm); 100 W x 6 ch (when in 4 Ohm stereo); D-class operation for natural sound; Floating input circuit that prevents ground from loops; Butterworth 12 dB/oct built-in crossover; Compatible with idling stops (maintains operating environment even if the power voltage drops in 5 seconds) Channel Mode: 3 ch/4ch/5ch/6ch; Output power: 100W x 6ch; 4Ω stereo; 100W x 6ch; 2Ω stereo; 200W x 3ch; 4Ω bridge; Output part operation class; D-class operation; Frequency characteristics; 10~30KHz; Distortion rate; Less than 0.05%; SN; 98dB and above; Built-in CrossOver HP/LP 5 ch) Crossover frequency /Slope HP 15-4.0KHz Butterworth 12dB/oct LP 40-4.0KHz Butterworth 12dB/oct (5ch/6ch) Input Sensitivity RCA: 0.5V to 6.0V Input Impedance RCA: 20KΩ Input Mode 6ch RCA Damping Factor 100+ Pre-Out High Level Input Not supported, Auto Power On Function Not Support Remote Level Controller Not Support Operating Power Supply Voltage 10.5 V - 16.0 V (Supports Short Power Supply Voltage Drop Up To 5 Seconds / 6 V), Idling Current 1.55 A (Unsignal), Built-in Fuse, ATO 35A x 2 (On Board), External Dimensions (W x H x D) 154 x 50 x 320 (mm) Weight: 7.12 lbs (3.1 kg)