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Description

Autotek SM-2400.4D

The Autotek SM-2400.4D (Street Machine series) is a high power 4-channel Class D car amplifier designed to drive full-range speakers or bridged subwoofer setups. It delivers up to 2400W peak power with efficient MOSFET design, adjustable crossovers, and strong thermal protection — making it suitable for full car audio system upgrades.


Details & Specs

Category Specification
Type Amplifier
Brand Autotek
Series STREET MACHINE
Category Mobile
Condition New
Color Black
Warranty 1 Year
Compatible Vehicles Universal
Amp Class Class D
Total Channels 4
Max Power 2400 Watts
Power @ 2 Ohms 4 × 600 Watts
Power @ 4 Ohms 4 × 300 Watts
Mono Bridged @ 4 Ohms 2 × 1200 Watts
Crossover Variable Electronic 12dB/Octave
High Pass Crossover 40Hz – 400Hz
Low Pass Crossover 40Hz – 400Hz
Variable Voltage 0.2 – 6V
Signal to Noise Ratio >100dB
Frequency Response 20Hz – 20kHz
Total Harmonic Distortion (THD) < 0.5%
Speaker Level Inputs RCA
Power Terminal 4 GA (12V/GND)
Speaker Terminal Wire Gauge 8 GA
Fusing External 80A

 


Features & Benefits

Feature Description
Low Noise Preamplifier Circuit Ensures low-voltage signal from the source unit enters with minimal distortion
RCA Inputs High-quality RCA connections designed to reduce interference and signal loss
Operation Mode Four-channel stereo, dual stereo bridged, stereo + bridged mono, dual bridged mono
Crossover Type Fully adjustable 12dB crossovers
Electronic Equalizer Onboard electronic crossover allows frequency tuning for speakers and subwoofers
Class / Topology Class D design for high efficiency and compact size
Output Device Technology Pro-Fi™ high-speed MOSFETs for improved efficiency, sound quality, and low distortion
Heat Sink Sound Shield™ aluminum heatsink with extra mass for cooling and distortion reduction
Power Supply High-energy PWM (Pulse Width Modulated) power supply for efficient power delivery
Output Connections Nickel-plated brass terminals for secure and corrosion-resistant connections
Connection Type Screw-down connectors for quick and secure installation
LED Protection System Illuminated indicators for overload and speaker short-circuit protection

 


Overview

Autotek SM-2400.4D STREET MACHINE amplifier series with QTD Technology delivers 2400 watts to speakers and features built-in electronic crossovers.

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Questions and Answers

Q1: What is the Autotek SM-2400.4D?

A1: It is a 4-channel Class D amplifier designed for powering speakers or bridged subwoofer setups in cars.

Q2: What is the power output?

A2:

  • 4 × 300W @ 4Ω
  • 4 × 600W @ 2Ω
  • 2 × 1200W bridged @ 4Ω
  • 2400W max power
Q3: What features does it include?

A3:

  • Class D high efficiency design
  • Variable high-pass & low-pass crossover (40Hz–400Hz)
  • MOSFET power supply
  • RCA inputs with low noise preamp circuit
Q4: Can it be bridged?

A4: Yes — it supports 2-channel bridged mode, giving strong power for subwoofers.

Q5: What systems can it run?

A5:

  • 4 door speakers (full setup)
  • OR 2 speakers + 1 subwoofer (bridged)
  • OR full system tuning (front + rear + sub)

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