RXM-F3 1600 Watt Marine/Boat 4 Channel Amplifier Amp+Pa Microphone. Rockville RXM-F3 1600w/260w Dyno-Certified RMS 4-Channel Marine Amplifier. Dyno Certified RMS Power Ratings: (Certified Dyno Test / Less than 1 % THD)….. CH3 & CH4 Low Pass 50Hz – 3KHz. CH3 & CH4 High Pass 15Hz – 1KHz. CH1 & CH2 High Pass 50Hz – 300Hz, 500Hz – 3Khz (x10). Fully Adjustable 12dB Bass Equalizer. 2 Ohm Stable Stereo. 4 Ohm Mono Bridgeable. 3 Channel Mixed-Mono Capable. Full IC-Controlled Protection Circuitry. Mute and Delay Soft Start System. High Level Input with Smart Auto Turn-On. 2 CH / 4 CH Input Mode Switch. RCA Preamp Line Output. ELNA Brand Audiophile Capacitors. 8 Volt Preamp Circuitry. Status Mode LED Indicator. Minimum THD at Rated Power. Three 20 Amp Maxi Fuses. Dimensions: (W x H x L) 8.6″ x 2″ x 13.7. Rockville RXM-F3 1600 Watt Marine/Boat 4 Channel Amplifier Amp+PA Microphone. Before we talk about the actual amplifier, I wanted to point out that we included a microphone. Most brands do not do this. We wanted to provide you guys with the best sounding marine amplifier of course. But we also wanted to give you the ability to have a microphone so you can use all the power of the system to communicate when out on the water. This will give you many new applications of what you can use your marine system for. We included a special circuitry in the amplifier that when you talk through the microphone the music will get lower and when you are done talking the music will go back to normal volume. The RXM-F3 has a conformal coating on its PCB (printed circuit board) in order to protect against moisture, dust, chemicals, and temperature extremes. This coating protects the amplifier from the elements of the ocean. If water gets sprayed on the amplifier you will not have to worry. The exterior screws are made of stainless steel to better withstand the elements. This amplifier is fully marine-rated from start to finish. This formula almost always works within 20%. RXM-F3 features three 20 Amp Maxi fuses. This unit also features a high speed MOSFET power supply, studio-grade bipolar output stage transistors and ELNA brand audiophile capacitors. It has a fully adjustable 12dB/Octave cross over with differential circuitry. High Level inputs, also referred to as Speaker Level inputs, allow you to install the amplifier into your vehicle even if you do not have any preamp outputs available. This amplifier is completely universal. It can be installed to any marine system. Other features include Auto-Start Smart turn-on (This function senses when there is a signal from the head unit and automatically turns on the amplifier hence no need to run a Remote Turn-On wire), a fully adjustable 12dB bass equalizer, 2 ch/ 4 ch input mode switch, mute and delay soft start technology, and a crossover band-pass control. The circuitry of this amplifier is a class A/B circuitry. Class A/B is known to have amazing sound quality. Pro audio amps usually all are class A/B. Class A/B however is not known for its efficiency. To make this amplifier more efficient we simulated a class “G” amplifier. Class G is technology that switches the rail voltage depending on how much power is being used. We have similar technology built into these class A/B amplifiers which make these about 65-70% efficiency which is just amazing for a class A/B amplifier. Dyno Certified RMS Power Ratings. (Certified Dyno Test / Less than 1 % THD) (Use these ratings when comparing with top brands such as Kicker, Rockford Fosgate, etc)….. (Use these ratings when comparing with the top budget brands such as Boss, Power Acoustik, etc)….. High-Speed MOSFET Power Supply. Studio-Grade Bipolar Output Stage Transistors. Fully Adjustable 12dB / Octave Crossover with Differential Circuitry. Frequency Response: 10Hz – 40KHz. Whats in the box. 3 x 3 x 3 inches. We reserve the right to cancel any order for any reason at any time. We are not responsible for undeliverable addresses. Your feedback very important to us, after you get your package and you are. Satisfied with our service. If you have any problem with your order / any questions please before leave any type of feedback. Thank you for shopping at our store.