Descriptions

About: CT Sounds CT-80.4D 4-Channel Car Audio Amplifier - 120W RMS x 4 

CT Sounds engineered the CT-80.4D Full-Range Class D Multichannel 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 to do 70 mph down the highway with the windows down and still have crisp and clear sound over the wind noise then look no further.

This multi-channel amplifier features a Low Pass Filter (LPF) and Subsonic Filter 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 make it easy to install in any car audio application. 

You can sleep easy at night knowing your 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.

Product Highlights: 

• RMS Power: 2Ω @ 14.4v: 125 Watts x 4-Channels

• RMS Power: 4Ω @ 14.4v: 80 Watts x 4-Channels
• RMS Power: 4Ω @ 14.4v: 250 Watts x 2-Channels Bridged
• Power & Ground Input Size: 4 Gauge
• Speaker Input Size: 12 Gauge

Features:

• High Level Input
• 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 

Specifications: 

• Amplifier Type: 4-Channel Amplifier
• Amplifier Circuitry: Class D
• Built-In Crossover: Yes; HPF, Full-Range, LPF
• Bridgeable: Yes
• RMS Power @ 2 Ohm: 125 Watts x 4-Ch (14.4v)
• RMS Power @ 4 Ohm: 80 Watts x 4-Ch (14.4v)
• RMS Power @ 4 Ohm (Bridged): 250 Watts x 2-Ch (14.4v)
• Recommended Fuse: 60A (Internal Fuse Built-In)
• Power & Ground Input Size: 4 Gauge
• Speaker Input Size: 8 Gauge
• Gain Adjustment: 0.22v - 9v
• Low Pass Filter (LPF): 40 Hz - 4 Hz
• High Pass Filter (HPF): 40 Hz - 4 Hz
• Bass Boost: 0 dB - 12 dB
• Bass Boost Frequency: 45 Hz
• Frequency Response: 20 Hz - 20 kHz
• Signal-To-Noise Ratio (S/N): 87 dB
• Damping Factor: 140
• Input Impedance: 22 Kohms
• Input Sensitivity: 220 mV
• Operating Voltage: 9v - 16v
• Minimum Impedance: 2 ohm
• Dimensions (L x W x H): 7.87" x 5.63" x 2.19"

Installation Tips:

• Make sure to use the correct gauge wiring, for the CT-80.4D we suggest using 4GA power wire, anything smaller is never recommended for this amplifier. 
• Make sure to properly ground your amplifier. We recommending grounding to the frame of your car. Make sure to clean the surface well, sand down the surface removing any paint, dirt, rust, etc.. so the connection is as strong as possible. We recommend using a bolt (do not use screws). Do not ground the amplifier to a seat bolt or any existing bolt on your vehicle (this a really a bad idea).
• Tune your amplifier with a DD-1 or O-Scope, make sure it is not clipping. Clipping is the leading cause of subwoofer deaths.
• Do not mount your amplifier to your subwoofer box. Mount your amplifier away from the subwoofer enclosure in a secure location. Vibration is one of the leading causes of amplifiers deaths. 

Note: If your amplifier is getting hot and/or shutting off it is likely because you did not follow the above. A poor ground, a loose connection, using too small of wire, or not using OFC wiring is the main reason this would happen.