The M4+ DSP/amplifier can be considered as the little brother of the M6 model as both models share the very compact heatsink. The main difference is the M4+ has not only have more power per channel but also has 4 DSP controlled pre-outs. The M4+ features 4 x 100 at 4 Ohms, 4 x 135 at 2 Ohms and is bridgeable to 2 x 270 watts at 4 Ohms.Start-Stop readyEPS (Intelligent High-Level Input-Error Protection System)Brushed aluminum heat sink and end panelsAuto Turn On via DC Offset or Signal SensingUtilizes 4-fold laminated circuit boards that allows for small size and effectively suppresses EMI (RF) interference which is a must with full range Class D amplifiers. Passes the difficult European EMI standardsClipping LED’sWith the easy-to-use MUSWAY PC software, the M4+ can be configured perfectly and in real time via PC or the new Musway app for your smartphone or tablet.With the 3 optional USB Bluetooth dongles you can stream audio, stream aptX HD Hi Res audio, and can have app control for DSP Tuning from your smartphone or tablet. Also available is the optional DRC1 digital remote control with OLED display that puts the control of your audio system at your fingertips.
 
Product Specifications:
OUTPUT POWER (RMS) at 13.8 VDC, 1% THD:
4CH at 4 Ohms:100 W x 4
4CH at 2 Ohms:135 W x 4
2CH - (Bridge 1/2; 3/4) at 4 Ohms: 270 W x 2
Distortion - THD (1 kHz at 4 Ohms, 90% Power) :0.1%
Bandwidth (-3 dB, 2 V RMS, 4Ohms): 10Hz-22KHz
S/N ratio at A weighted, 1 V, Max. Power: 90dB A
Damping factor at 1 kHz, 2 V RMS, 4 Ohms: >70
Input sensitivity: 10V-30V RMS(High-level) 2V-6V RMS(Low-level)
Input impedance: 13 0(High-level) 47K0(Low-level)
LOAD IMPEDANCE (MIN): 4CH: 2 Ohms 2CH - Bridge (1-2) (3-4) :4 Ohms
Dimensions (inches) : 5.9 (L) x 8.66 (W) x 1.73 (H)
Net Weight :1.6KG