The new M4+v3 DSP amplifier can be considered as the little brother of the M6 model. The only difference: The M4+ is coming with four amplified speakers, but still offering more power per channel than the larger M6.  The newly engineered Class D technology is particularly immune to EMC interference, which is virtually indispensable in today‘s electronic-packed vehicles.

A key-premise to enjoy interference-free music while driving. With four bridged power outputs, each one providing 135 watts RMS per channel (2  Ω), the M4+v3 offers remarkable output power with a total of 540 watts RMS. M4 + is perfect for tuning original 4-channel sound systems. Four additional DSP-tunable preamp outputs allow the integration of further amplifiers.

Intelligent High Level Input (Error Protection System)

Start-Stop ready, Auto Turn-On

Burr-Brown converters (PCM3168A) and Analog Devices DSP (ADAU1452)

32bit, 295MIPS DSP technology, controllable via new V3 PC software or Tunest App

Signal-to-noise Ratio ≥90dB

Frequency Response 15 Hz – 22 kHz (-3dB)

THD ≤0,1% (1 kHz, 4Ω, 90% Power)

Controllable AUX input sensitivity, Clipping LEDs

Plug+Play with vehicle-specific cable sets


EPS technology which prevents when connected to an OEM factory radio that nofunctions are impaired or error messages are written into the vehicle memory.

6 -fold laminated board effectively suppresses EMC interference due to the favorable topology.

Bridging amplifier channels enables more flexibility to handle the power.


Power output(RMS) @ 14.4 VDC, 1% THD:

4CH @ 4 Ω:55 W x 4

4CH @ 2 Ω:70 W x4

2CH - (bridged 1/2; 3/4) @ 4 Ω: 145 W x 2

6 x High Level Input,10-30V RMS

2 x AUX/RCA Input, 1-8V RMS

4 x Loudspeaker Output amplified

6 x Pre-Amplifier Output/RCA (configurable via DSP)

Dimensions: 165 x 41 x 150 mm