{"product_id":"mb-quart-na3-1000-5-5-channel-waterproof-marine-amplifier","title":"MB Quart NA3-1000.5 5-Channel Waterproof Marine Amplifier","description":"\u003cp\u003eThe MB Quart NA3-1000.5 is a five-channel marine amplifier designed to power a complete boat, powersports, or outdoor audio system from one weather-resistant chassis. It combines four full-range channels for speakers with a dedicated fifth channel for a subwoofer. This layout helps simplify system design when upgrading factory or aftermarket marine audio.\u003c\/p\u003e\u003cp\u003eChannels 1 through 4 are intended for full-range speakers, while the dedicated Channel 5 subwoofer section provides low-frequency support. The amplifier is rated at 4 x 60 watts plus 1 x 350 watts RMS at 4 ohms, with the four full-range channels rated at 120 watts each at 2 ohms. Channel 5 is stable to 1 ohm for subwoofer applications.\u003c\/p\u003e\u003cp\u003eThe NA3-1000.5 uses MB Quart Class SQ circuitry for its multi-channel section and a Class Q1 mono design for Channel 5. Adjustable input sensitivity, electronic crossovers, and bass EQ allow the amplifier to be matched to compatible speakers, subwoofers, and source units. Its Q-Stasis preamplifier stage is designed to accept low-voltage source signals with minimal added distortion.\u003c\/p\u003e\u003cp\u003eMarine-focused construction makes this amplifier suitable for installations exposed to water, dust, vibration, and changing outdoor conditions. It carries an IPX67 rating and uses marine-specific connectors. The gloss-white housing and concealed top-mounted control panel support a clean installation while keeping tuning controls protected.\u003c\/p\u003e\u003cp\u003eThis amplifier is a practical fit for systems using four cabin, tower, or deck speakers plus one subwoofer. RCA inputs are provided for source units with preamp outputs, while high-level input capability and DC-sense turn-on support integration with compatible source units that do not provide RCA outputs. A bass remote is included for convenient adjustment of the subwoofer channel level.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFive-Channel Layout:\u003c\/strong\u003e Powers four full-range speakers and one subwoofer from one amplifier.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIPX67 Protection:\u003c\/strong\u003e Supports use in waterproof and dustproof marine-oriented installations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDedicated Subwoofer Channel:\u003c\/strong\u003e Channel 5 is stable to 1 ohm and includes bass remote support.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable Crossovers:\u003c\/strong\u003e Lets you set high-pass and low-pass filtering for appropriate speakers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ-Stasis Preamplifier:\u003c\/strong\u003e Helps process low-voltage source signals with minimal distortion.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSelectable Turn-On Methods:\u003c\/strong\u003e Supports remote-wire turn-on or DC-sense activation.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign \u0026amp; Installation\u003c\/h3\u003e\u003cp\u003eThe NA3-1000.5 has a gloss-white marine chassis with a top-mounted control panel concealed beneath a removable faceplate. Its marine-specific connectors, IPX67 rating, and protected control arrangement are intended for marine and powersports environments. LED protection diagnostics provide amplifier status feedback.\u003c\/p\u003e\u003cp\u003eInstall the amplifier on a secure surface with adequate airflow and do not mount it upside down. Use high-quality 10 AWG power and ground cable, connect the power lead through a fuse within 18 inches of the battery, and make the ground connection to clean bare metal near the amplifier. Use the front and rear high-pass filters for full-range speakers and the Channel 5 low-pass filter for a compatible subwoofer.\u003c\/p\u003e","brand":"MB Quart","offers":[{"title":"Default Title","offer_id":45633162215494,"sku":"NA3-1000-5","price":353.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0048\/4163\/5910\/files\/51jRCVVb7JL.jpg?v=1784407259","url":"https:\/\/audiowatt.store\/products\/mb-quart-na3-1000-5-5-channel-waterproof-marine-amplifier","provider":"Audio Watt Store","version":"1.0","type":"link"}