Massive Audio EX44 - Car Audio 800 Watt, 200w x 4 RMS, Nano Edge Series, 4 Channel Car Amplifier, Bass Boost HIGH PERFORMANCE CAR AUDIO AMPLIFIER | One of the best values you will find for a car amplifiers for cars in the market! This 12v car amplifier features: 100w x 4 RMS @ 2/4 Ohm / 400w x 2 MAX, Freq: 10Hz - 25KHz, 0~12dB, &lt;0.05% TDH, Built-In OEM Line Converter, High Power in Extremely Small Heat Sink, Bass Boost 0~12dB, Class A/B Design and Ground Loop Isolator. This multi-channel amplifier for cars provides a real punch for your cars speakers or subwoofers! PRODUCES POWERFUL, CLEAN, FULL SOUND | Don't settle for weak sounding or underperforming car amplifiers. Your car audio system would not be complete without our multi-channel Massive amplifier. This car audio amplifier features: Built-in OEM line converters with RCA inputs that can take a high level speaker signal at up to 10 Volts directly in. Input Level 0.4V - 10V Hi Inputs or Low Inputs. | SAVE 10% - Buy ANY 2 OF OUR PRODUCTS using Code MAD10OFF. QUALITY TESTED AND GUARANTEED TO ALWAYS REACH ITS RATED POWER | Get more wattage and quality sound for less money! That is our guarantee! You don't need to set the gains to low to avoid distortion. These car amplifiers provides high power with low efficiency. Also, by sensing the DC offset of a factory radio it can activate the ATO (Auto Turn On) feature and Next Generation Advanced 5 Way Protection Circuitry. GREAT QUALITY PRODUCTS THAT WILL LAST LONGER | With 5-Way Advanced Protection and custom high-grade components your investment will last! With our extra features like Built-in Noise Reduction Circuitry, Auto Sensing Turn On Function, 12V Remote Output for External Devices (Hi-Level Inputs), and 4 Layers PCB design with SMD parts ensure you get your money's worth! MASSIVE AUDIO QUALITY GUARANTEED. Since 1999, Massive Audio has been an industry leader in high performance audio products. Massive Audio laid its roots in high quality audio reproduction through in-house engineering and a dedication to customers.