Ignitions and Electrical› Ignition Boxes and Components

Ctsounds

CT-400.1D Class D Monoblock Amplifier

$599.99

SKU: CT-400-1D

In Stock
In Stock
Ships by Sep 12
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The CT Sounds CT-400.1D is a compact Class D monoblock car amplifier engineered to deliver powerful audio in a small footprint. It provides 400 watts RMS power at 1 ohm and is 1-ohm stable. The amplifier features a MOSFET power supply and a proprietary heat dissipation design for efficient operation.

This amplifier includes a Low Pass Filter (LPF), Subsonic Filter, and Bass Boost for sound customization. It also incorporates protection circuitry for high voltage, low voltage, over current, and high-temperature conditions, along with LED indicators for power and protection status.
Show original supplier description
The CT Sounds CT-400.1D Compact Class D Monoblock Car Amplifier is designed for those seeking a powerful amplifier that can fit virtually anywhere in a vehicle without compromising audio quality or budget. It delivers a robust 400 watts of RMS power at a 1-ohm impedance, making it a strong contender for powering subwoofers. Constructed with a MOSFET power supply, this amplifier utilizes advanced components for clean power delivery. Its Class D circuitry and proprietary heat dissipation design ensure it runs cool even during demanding playlists. The compact chassis and small footprint simplify installation in various car audio applications. For precise sound tuning, the CT-400.1D is equipped with a Low Pass Filter (LPF) adjustable from 40 Hz to 180 Hz, a Subsonic Filter ranging from 0 Hz to 50 Hz, and a Bass Boost feature offering 0 dB to 12 dB of enhancement, adjustable between 30 Hz and 80 Hz. It also includes continuously-variable input gain control and a soft turn-on circuit. Safety and reliability are paramount, with built-in protection circuitry guarding against high voltage, low voltage, over current, and high-temperature issues. LED indicators provide visual status for power and protection. The amplifier requires a 4-gauge power and ground wire and an 8-gauge speaker wire connection.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandCtsounds
Part NumberCT-400-1D
CategoryIgnitions and Electrical

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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

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