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Blaupunkt AMP4000D 4000 Watt Class D Monoblock Amplifier

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Key Features

  • 4000 Watt Class D Monoblock Amplifier
  • 4-ohm / 2-ohm / 1 ohm stable
  • 2800W x 1 @ 1 Ω
  • 2000W x 1 @ 2 Ω
  • 1000W x 1 @ 4 Ω
  • Includes Bass Control Knob
Unit includes: Monoblock Amplifier, Installation Hardware, Bass Control Knob, and Instruction Manual

Blaupunkt AMP4000D 4000 Watt Class D Monoblock Amplifier
  • 4000 Watt Class D Monoblock Amplifier
  • Amplifier will operate with 1 ohm, 2 ohm or 4 ohm loads
  • 200mV-8V High Speaker Level or Low Level RCA Inputs
  • Remote gain control included
  • 2 Gauge power wire recommended
    Pre-Amp features:
  • Frequency Response - 10Hz - 250Hz
  • Signal to Noise Ratio - >96dB
  • Gain Adjust - 200mV - 8V
  • Total Harmonic Distortion - ~0.05%
  • Crossover Frequency - 40Hz - 180Hz
  • Crossover Slope - (dB/oct): 12dB/oc
  • Fuse - 40A x 3
    Inputs and Outputs:
  • One-channel operation (2-Channel input)
  • 1 Pair RCA low level inputs
    Max Power Output:
  • Total Power Output: 4000 Watts
    RMS Power Output:
  • 2800W x 1 @ 1 Ω
  • 2000W x 1 @ 2 Ω
  • 1000W x 1 @ 4 Ω
  • Overall Dimensions: 2.2 inch (H) x 13-7/8 inch (L) x 7.4 inch (W)
More Information
Manufacturer Blaupunkt
Part Number AMP4000D
Amplifier Topology Class Class D
Number of Channels 1 Channel
Total RMS Power at 1 ohm 2,800.00
Total RMS Power at 2 ohm 2,000.00
Total RMS Power at 4 ohm 1,000.00
RMS Output per Channel (x1 at 2 ohms) 2,800.00 Watts
RMS Output per Channel (x1 at 1 ohms) 2,000.00 Watts
RMS Output per Channel (x1 at 4 ohms) 1,000.00 Watts
Total Peak Power Output 4,000.00 (Watts)
Amplifier Bridging Not Bridgable
Minimum Impedance in Bridged Mode Not Bridgeable
Minimum Impedance in Un-Bridged Mode 1 ohm
Strappable Amplifier No
RCA Pre-amp Audio inputs 1 Pair
RCA Pre-amp Audio outputs None
Preamp voltage 200 mV - 8 V
Speaker level inputs Yes
Gain Control Yes
Bass Knob / Remote Gain Yes
Built in Crossover Low-pass
Cooling Fan No
Color Black
Warranty 90 days
Recommended Power Wire Gauge 2 Gauge
Overall Height 2.20 inches
Overall Length 13.87 inches
Overall Width 7.40 inches
CEA2006 Compliant No
UPC Code 815592027034
Return period 30 days
Exchange period 30 days
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Testing and analysis of the Blaupunkt AMP4000D

It’s no secret that Blaupunkt amps are cheap, but that doesn’t mean that they aren’t a solid purchase depending on your system. Available online from us at qualitymobilevideo.com and in Walmart stores, these won’t break the bank and offer very solid performance. The AMP4000D is a monoblock amplifier coming under $150 and boasts some serious power that we’ll test ourselves in a few minutes. 

What's inside the box

Inside the box is an instruction manual, remote bass control... and extension cable, hardware, extra 50 amp fuses, and monoblock amplifier.


This is a versatile monoblock amplifier because it can operate in 1 ohm, 2 ohm or 4 ohm loads. Blaupunkt claims that this monoblock amplifier puts out 1000W RMS @ 4 ohms, 2000W RMS @ 2 ohms and 2800W RMS @ 1 ohms. With a price tag under $150, if those specs are accurate, that’s one hell of a deal in terms of cost per watt. But 2800W RMS @ 1 ohm, I’d be shocked if it hit that.


The AMP4000D has a single set of RCA inputs to connect directly to your head unit with a set of RCA cables, or with a line output converter. For adjustments it has gain control, variable 0 - +18dB bass boost, variable 0 - 180 degree subwoofer phase and a variable 50 Hz to 250 Hz low pass filter. Connect the included remote bass control to its input to adjust bass levels up front. 

Blaupunkt included three built-in 50 amp fuses, as well as large speaker and ground terminals. We recommend a minimum of 1/0 gauge power and ground leads. Check out our amplifier installation kits online, link in bio. 


Dimensions of the amplifier are 2.2” in height, 12.5” in length and 7.4” in width.

Blaupunkt AMP4000D Testing


Two channels driven, 4 ohm, 1 KHz, 14.2v

HP8903B Audio Analyzer: 434.7W RMS per channel, 0.9% distortion and 41.4 volts of output.

AMM-1: 397 Watts


Two channels driven, 2 ohm, 1 KHz, 13.6v

HP8903B Audio Analyzer: 691.9W RMS per channel, 1.3% distortion and 36.93 volts of output.

AMM-1: 634 Watts


Two channels driven, 1 ohm, 1 KHz, 13.1v

HP8903B Audio Analyzer: 961W RMS per channel, 2.1% distortion and 30.5 volts of output.

AMM-1: 920 Watts




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