CT-400.1D // 400 Watts RMS Monoblock Car Audio Amplifier
CT-400.1D // 400 Watts RMS Monoblock Car Audio Amplifier
CT-400.1D // 400 Watts RMS Monoblock Car Audio Amplifier
CT-400.1D // 400 Watts RMS Monoblock Car Audio Amplifier
CT-400.1D // 400 Watts RMS Monoblock Car Audio Amplifier
CT-400.1D // 400 Watts RMS Monoblock Car Audio Amplifier

CT-400.1D // 400 Watts RMS Monoblock Car Audio Amplifier

Regular price 45% OFF Before: $199.99 Sale pricePrice: $109.99

CT Sounds engineered the CT-400.1D Compact Class D Monoblock Car Amplifier for anyone in need of a powerhouse amplifier that fits just about anywhere in your vehicle and won’t destroy your wallet. If you want a 400-watt amplifier that absolutely pounds and delivers clean power to your subwoofers then look no further. 

This 1-ohm stable monoblock amplifier features a Low Pass Filter (LPF), Subsonic Filter, and Bass Boost so you can get the exact sound you are looking for out of your amplifier. The MOSFET power supply and proprietary heat dissipation design will ensure that the amplifier runs cool for even the most demanding playlists. Furthermore, the compact chassis and small footprint makes it easy to install in any car audio application. 

You can sleep easy at night knowing your subwoofer amplifier is protected from damage due to the amplifier's uniquely engineered protection circuitry featuring high voltage, low voltage, over current, and high-temperature protection.

Quick Facts:
RMS Power: 1Ω @ 14.4v 400 Watts x 1-Channel
RMS Power: 2Ω @ 14.4v 300 Watts x 1-Channel
RMS Power: 4Ω @ 14.4v 150 Watts x 1-Channel
Power & Ground Input Size: 4 Gauge
Speaker Input Size: 12 Gauge
Remote Bass Knob: ✔️
Continuously-Variable Input Gain Control ✔️
Remote Turn-On / Turn-Off Circuit ✔️
MOSFET Pulse Width Modulated Power Supply ✔️
Soft Turn-On Circuit ✔️
High Voltage / Low Voltage Protection Circuit ✔️
Thermal and Speaker Short Protection Circuit ✔️
LED Power and Protection Indicators ✔️
Technical Specifications:
Amplifier Type: Monoblock Amplifier
Amplifier Circuitry: Class D
Strappable? Yes; Signal Output is Master
RMS Power @ 1 Ohm: 400 Watts x 1-Channel (14.4v)
RMS Power @ 2 Ohm: 300 Watts x 1-Channel (14.4v)
RMS Power @ 4 Ohm: 150 Watts x 1-Channel (14.4v)
Recommended Fuse: 50A
Power & Ground Input Size: 4 Gauge
Speaker Input Size: 8 Gauge
Gain Adjustment: 0.15v - 10v
Low Pass Filter (LPF): 40 Hz - 180 Hz
Subsonic Filter: 0 Hz - 50 Hz
Bass Boost: 0 dB - 12 dB
Bass Boost Frequency: 30 Hz - 80 Hz
Frequency Response: 20 Hz - 320 kHz
Signal-To-Noise Ratio (S/N): 93 dB
Damping Factor: 170
Input Impedance: 22 Kohms
Input Sensitivity: 150 mV
Operating Voltage: 8.8v - 15.4v
Minimum Impedance: 1 ohm
Length: 8.38"
Width: 5.63"
Height: 2.19"
Amp dyno video

Customer Reviews

Based on 13 reviews
Connor W. (Lincoln, NE)
CT-400.1D//400 watts rms

Really good, really easy to put in and just an amazing product

CHRIS H. (Minneapolis, MN)


J. (Pittsburgh, PA)
2020 Challenger RT

All - I saw a review on a bunch of sites by one guy with a Challenger who went with CT Sounds… he said they are his favorite speakers after trying a bunch of brands. I’m in the same boat. I’ve tried a bunch of brands, spent a bunch of money, and it was just okay. I gambled with CT Sounds and couldn’t be happier!! I spent a quarter the cost and got better sound. I’m running a CT-LC2, CT400.1, CT150.4, Tropo Loaded 8”, 2 sets of Meso 3-ways, and a shitty off brand 3.5” since CT Sounds doesn’t make a 3.5”. I haven’t installed the Meso 3-ways in the doors yet but the rest is in and I’m blown away! This isn’t some BS hype cause I got free shit.. No straight up there shit hits hard and loud. I haven’t even turned it all the way up. There’s still 65% left. I cruise with the windows down at 70 mph and it’s loud, crisp, and sounds amazing. It’s way more than I can say for those other brands! I don’t even have it tuned yet. Out of the box hands down the best you can get for your dollar. I can’t say enough. To top it off the customer service is the best! I through up some pictures. If you have questions about my install, [****]. If you have product questions [****], there customer service is the shit!

Customer (Tacoma, WA)
2000.1 amp ct audio

Amazing not to big heavy well built looks cool sounds amazing hits pretty dang hard underrated by like 500

Robert C. (Bethlehem, PA)
Customer service

Purchased ct400 , received in a few days. Unfortunately amp would prematurely go into protect mode. Worked with customer service trouble shooting via emails, returned. CT verified issues and replaced with upgrade. I was please to see a company truly stand by its products. My only issue is lack of live phone customer support. I would definitely recommend CT Sounds