3. Amplifier for beginners
  5. ATC-400

ATC-400

ATC-400

Technical Highlights

  • 1-ohm stable, up to 325 W RMS power for optimal sound quality.
  • Compact design, 74.5x95.5x52.2 mm, ideal for space-saving installation.
  • Flexible 8-16 V operating voltage and 40 A maximum current consumption.
  • More technical details
€169.00
€169.00 €169.00
2% discount with credit card

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ProductATC-400

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DD Audio-ATC-400-1-Kanal Verstärker-masori-kaufen
€169.00
€169.00 €169.00

The ATC-400 from DD Audio is an ultra-compact 1-Channel Amplifier specifically designed to directly replace the standard terminal in DD Audio LE series enclosures. This amplifier allows for easy and space-saving conversion of subwoofer enclosures to active operation without the need for additional installation of large power amplifiers. The ATC-400 is 1-ohm stable and delivers up to 325 W RMS, making it ideal for everyday sound quality setups. Thanks to the innovative turn-on logic, it can be used with almost all radio systems, and the included bass remote allows for convenient volume adjustment from the driver's seat. Its extremely compact design measures 74.5 × 95.5 × 52.2 mm, enabling direct mounting instead of the terminal field, saving installation time and providing a clean look.

Features

  • Ultra-compact design for space-saving installation
  • Direct mounting in DD Audio LE series enclosures
  • 1-ohm stable for high power
  • Bass remote for easy volume adjustment
  • Flexible turn-on logic for factory and aftermarket radios
  • Stable connections for secure power supply

Technical Specifications

  • Channels: 1
  • Operating Voltage: 8–16 V
  • RMS Power @ 4 Ω: 100 W
  • RMS Power @ 2 Ω: 225 W
  • RMS Power @ 1 Ω: 325 W
  • Dynamic Power: 500 W
  • Max Current Draw: 40 A
  • Damping Factor: 150
  • THD: 1 %
  • Frequency Response: SUB 30–80 Hz / FR 80 Hz–20 kHz
  • High Pass Filter: 80 Hz (FR)
  • Subsonic Filter: 30 Hz (SUB)
  • Low-Pass Filter: 80 Hz (SUB)
  • Power Connection: up to 25 mm²
  • Speaker Connection: up to 4 mm²
  • Dimensions (mm): 74.5 × 95.5 × 52.2
  • Remote Control: Cable bass controller included

Frequently Asked Questions about ATC-400

What is the RMS power of the ATC-400 and what load stability does it offer?

This 1-channel Amplifier delivers a solid 100 W RMS at a load of 4 Ω, 225 W RMS at 2 Ω, and powerful 325 W RMS at 1 Ω according to the data sheet. It is designed for a variety of applications and allows operation in compact Subwoofer enclosures thanks to its 1-ohm stability, especially if you prefer a sound-quality setup oriented towards everyday use. Additionally, the device achieves a dynamic power of 500 W, providing extra power reserves in peak load situations. With a maximum current draw of 40 A and a damping factor of 150, the Amplifier can deliver strong impulses without losing musical detail. This ensures clean bass reproduction over time.

What advantages does the ultra-compact form factor of the ATC-400 offer during installation?

With dimensions of 74.5 × 95.5 × 52.2 mm, this compact 1-channel audio Amplifier fits practically seamlessly into tight installation situations. It replaces the standard terminal in DD Audio LE series enclosures, saving additional space as a separate installation of classic power amplifiers is not required. Especially if you prefer a tidy appearance, the extremely space-saving design benefits you, as it facilitates discreet integration into cabinet walls, trunk compartments, or other enclosure types. This noticeably reduces installation time. Additionally, there is more space for routing cables up to 25 mm² and connecting speaker cables up to 4 mm², which supports secure wiring without detours.

What frequency adjustment options does the ATC-400 offer for Subwoofers and Fullrange?

This monoblock amp supports two operating modes, depending on the chosen Crossover. The sub-range operates between 30 Hz and 80 Hz, with the fixed subsonic filter limiting low frequency components at 30 Hz to protect the woofer. The corresponding low-pass filter is set at 80 Hz, cutting off higher frequencies, making the device ideal for Subwoofer applications. In full-range operation, characterized by a high-pass filter of 80 Hz, this 1-channel Amplifier unfolds a broader spectrum and covers real frequencies up to 20 kHz. This allows you to power other speaker systems if you are looking for flexibility and want to realize different sound concepts. This keeps your setup adaptable.

How is the power-on logic of the ATC-400 designed to support many radio systems?

The device uses a flexible power-on method that accommodates both factory and aftermarket radios. It automatically detects when a music signal is present and activates itself without a separate remote line. Additionally, it can be controlled via traditional signal lines if a corresponding output is available on the radio. This allows for seamless integration into existing systems, regardless of whether high-level or low-level inputs are used. This intelligent switching function saves wiring effort while still ensuring a stable power supply. Especially when using an OEM radio without a dedicated power-on trigger, the amplifier remains ready for operation at all times without the need for complicated adapters. This keeps everything straightforward.

How does the bass remote work with the ATC-400 and what advantages does it offer?

The included cable remote allows you to adjust the bass level immediately without reaching for the main radio. Through the thin control cable, which can be comfortably routed to the driver's seat, you can add more or less bass depending on the music genre without changing the main settings. This is particularly useful when switching between different genres or simply wanting to adjust the bass intensity according to your listening habits. Thanks to the separate level potentiometer, fine-tuning is done smoothly and immediately. Furthermore, the basic setting of the internal low-pass filter remains unchanged, allowing you to achieve a noticeable effect in seconds without any loss of sound quality, for example during short music tests. This keeps you flexible.

What is the maximum current requirement of this 1-channel amplifier?

The ATC-400 requires up to 40 A in peak load situations, which seems remarkable for a compact amplifier of this class and indicates its reliable output performance. To ensure smooth operation, a power supply with cable cross-sections of up to 25 mm² is recommended. Especially when you use the power amplifier at high levels in the low-frequency range, the power consumption can temporarily be close to the maximum. Thanks to the stable connections, the transition resistance remains low, so the energy supply is not limited. In practical scenarios, you benefit from the efficient design, as it generates a comparatively moderate power consumption relative to the sound pressure produced. This way, the system and the onboard network work reliably together, continuously.

Why is the integrated damping factor important for bass lovers?

With the ATC-400, the damping factor is 150, which ensures tight control of the woofer. Especially at low frequencies, the ability for quick diaphragm return is essential to keep the bass precise and true to impulse. If you enjoy listening to music loudly and expect impressive bass lines, you benefit from the amplifier accurately capturing the subwoofer's vibrations and not transitioning into uncontrolled ringing. Particularly with delicate bass lines or electronic tracks, you will feel a nuanced reproduction without muddy resonances. Additionally, a high damping factor prevents energy loss because the diaphragm's movement is efficiently dampened. This optimizes tonal subtleties and dynamics. Thus, your bass pressure remains intact.

Is this power amplifier suitable for a sound quality setup with subtle bass support?

The ATC-400 fits perfectly into a sound concept because, in addition to its power design, it also offers a compact size. This allows you to discreetly integrate a Subwoofer without taking up valuable storage space. Especially at moderate volume, its clean bass reproduction impresses, as the frequency range from 30 Hz to 80 Hz can be adjusted cleanly, and the integrated subsonic filter protects the low-frequency range. With up to 325 W RMS at 1 Ω, there is enough reserve to deliver not only clear but also powerful tones. If needed, the bass remote control helps you adjust the level at any time without disturbing the entire system. Everything remains harmonious.

Can I mount the Amplifier directly instead of the terminal block in a Subwoofer enclosure?

The ATC-400 is specifically designed to completely replace the existing terminal in DD Audio LE series enclosures. With its dimensions of 74.5 × 95.5 × 52.2 mm, it fits perfectly in place of the standard connection panel, so no additional drilling or milling is necessary. This not only saves you time during the installation process but also avoids unnecessary effort that often arises with larger amplifiers. Thanks to this thoughtful design, you can upgrade your Subwoofer enclosure directly to an active system without having to resort to separate amplifier enclosures. This allows you to benefit from reduced wiring, a compact design, and a particularly tidy appearance. This makes your conversion easier.

Are there any special notes regarding the installation position to ensure optimal cooling of the amplifier?

When using the ATC-400, it should always be noted that surrounding air circulation is not blocked by objects or cushions. Since this model is mounted flush against the Subwoofer enclosure, it is advisable to position it with at least a few centimeters of free space around the enclosure. In particular, the areas around the heat sinks or ventilation openings must not be covered to allow heat energy to escape unhindered. If you place the device in a tight spare tire well, additional fans can promote heat dissipation. Also, ensure that the amplifier is reliably supplied during prolonged peak loads to avoid temperature rises. This way, you always operate within safe limits. You benefit.

Manufacturer information/responsible person

Audio Import Group
Pekka Kinnunen
Palkkitie 10
84100 Ylivieska
Finland

Contact: info@audioimport.fi

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