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SK-M4004D | 400 Watt 4-Channel Car Amplifier

  • The Skar Audio SK-M4004D full range class D four channel amplifier is part of the new mini amplifier series product lineup from Skar Audio. The SK-M4004D was engineered to be compact, but provide the power and reliability expected out of larger amplifiers. Featuring a high speed MOSFET power supply, and an efficient Class D design, this amplifier is powerful, reliable, and extremely versatile.

    The SK-M4004D makes for a great amplifier in applications where space is limited but power cannot be sacrificed. In addition, this four channel amplifier features high level input connections for those installations that lack an RCA connection. In addition to the high level inputs, this amplifier also utilizes an adapter harness for the speaker outputs allowing for an easier installation.

    RMS Power @ 2 Ω 140W x 4 Ch (14.4v)
    RMS Power @ 4 Ω 100W x 4 Ch (14.4v)
    Power & Ground Input Size 8 Gauge
    Preamp (RCA) and Speaker Level Inputs Yes

    *Skar Audio always recommends professional installation for all of our products.*

    *Never mount amplifiers directly on the enclosure*

    • Compact "Mini" Class D Full-Range Four Channel Car Amplifier
    • The compact design of this amplifier series allows for maximum versatility
    • RMS Power at 2 Ohms: 140 Watts x 4 Channels (14.4v)
    • RMS Power at 4 Ohms: 100 Watts x 4 Channels (14.4v)
    • RMS Power at 4 Ohms (Bridged): 270 Watts x 2 Channels (14.4v)
    • Frequency Response: 10Hz - 40kHz
    • Working Voltage: 8.5V - 16V
    • Signal-to-Noise Ratio (Sensitivity): 85dB
    • Efficiency at 4 Ohms: 86%
    • Damping Factor: 100<
    • Low Level Input (Gain): 8V - 0.2mV
    • Hi-Level Input Connections: Yes
    • Speaker Output Adapter Connection: Yes
    • Crossover Control: HPF / Full-Range / LPF
    • 4-Way Protection Circuitry Built-in (Thermal, Voltage, Speaker, DC)
    • LED Power & Protection Indicators
    • Fuse Rating: 40 Amps
    • 8 Gauge Power and Ground Input Terminals
    • Dimensions: 7.9" (Length) x 4.6" (Width) x 1.7" (Height)

    Channel 1/2 Crossover

    • High-Pass Filter / Full-Range / Low-Pass Filter
    • Variable Crossover Frequency Range: 50Hz - 500Hz

    Channel 3/4 Crossover

    • High-Pass Filter / Full-Range / Low-Pass Filter
    • Variable Crossover Frequency Range: 50Hz - 500Hz

    Click Here to Download the SK-M Amplifier Manual

  • Customer submitted photo gallery coming soon..

  • Product videos coming soon..


Customer Reviews

Based on 51 reviews
Great motorcycle amps!!!

I have 2 mini amps running 6 - SKAR 6.5’s and 1 -10 inch sub. My system is super clean and clear! Both amps fit under my front fairing. Can’t wait to install a system in my son’s Charger.

Powerful and in a tiny package

Running my 6.5 and 5.25 components with no problem at 4x 4ohms. I had to even back off gains a bunch. Fits in the location I need it to fit and works great. Keep in mind I am only running it 4 ohms and this thing gets hot fast

Great compact amplifier!!

Very surprising output from such a small footprint.

Skar Audio SK-M4004D

I'm going to call this "The little amp that could!" I was looking for a powerful amp that wouldn't break the bank. I need it to power my door speaker which are 6x9s and 6.5s. Both pairs need around 90 watts RMS. I also need it to be small because of space restraints. I already owned an LP-1000.1Dv2 so I knew how good Skar amps were already. All I'm going to say is this little amp transformed my system to another level! Can not believe the energy this thing produces. Door speakers sound like little subs lol. I have been "Skared"... My life is complete now...

Nice small Skar 4ch amp

just received my 4 ch amp, I am debating if I should purchase a second one so I could bridged one amp to front and one for rear and also for looks. my upgrade alternator 250amper is scheduled arriving 3/26, dannng cannot wait....

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