{"product_id":"mb-quart-na2-500-5-five-channel-powersports-amplifier","title":"MB Quart NA2-500.5 Five-Channel Powersports Amplifier","description":"\u003cp\u003eThe MB Quart NA2-500.5 is a compact five-channel Class D amplifier designed for marine and powersports audio systems. It combines four full-range channels with a dedicated subwoofer channel, allowing one amplifier to support speakers and bass in the same installation. Its compact format helps solve space limitations common in boats, UTVs, ATVs, and similar vehicles.\u003c\/p\u003e\u003cp\u003eThis amplifier is intended for system builders who want to power front and rear speakers while adding a subwoofer channel without installing separate amplifiers. At 4 ohms, it is rated for 4 x 40 watts plus 1 x 100 watts; at 2 ohms, published output is 4 x 80 watts plus 1 x 200 watts. The five-channel layout supports a balanced system with full-range output and dedicated low-frequency reinforcement.\u003c\/p\u003e\u003cp\u003eThe NA2-500.5 uses full-range Class D topology and a PWM MOSFET power supply to deliver power from a small aluminum heatsink chassis. Its Q-Stasis preamplifier stage is designed to reduce incoming source noise, while nickel-plated RCA inputs support corrosion-resistant signal connections. A signal-to-noise ratio greater than 90 dB and a 20 Hz to 20 kHz frequency response support clear system playback.\u003c\/p\u003e\u003cp\u003eBuilt-in signal controls make it practical for mixed speaker-and-subwoofer systems. Front and rear channels use switched full-range or high-pass operation, while the subwoofer channel uses a variable low-pass filter from 50 Hz to 150 Hz. The amplifier also provides bass boost adjustment at 45 Hz and includes a wired bass remote for convenient level adjustment.\u003c\/p\u003e\u003cp\u003eFor marine and powersports installations, the NA2-500.5 uses conformal-coated circuit boards and marine-grade protection intended to resist moisture and salt-spray exposure. Quick-disconnect wiring connections can simplify seasonal removal or service access. It is a suitable upgrade path for a compact multi-speaker system that also needs a dedicated subwoofer channel.\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 channels plus one dedicated subwoofer channel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClass D Amplification:\u003c\/strong\u003e Delivers efficient output from a compact amplifier chassis.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2-Ohm Capability:\u003c\/strong\u003e Published ratings support 2-ohm speaker and subwoofer loads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable Subwoofer LPF:\u003c\/strong\u003e Adjusts low-pass crossover frequency from 50 Hz to 150 Hz.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMarine-Grade Protection:\u003c\/strong\u003e Conformal-coated boards help resist moisture and salt-spray exposure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWired Bass Remote:\u003c\/strong\u003e Allows convenient adjustment of bass level from the vehicle.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign \u0026amp; Installation\u003c\/h3\u003e\u003cp\u003eThe NA2-500.5 has a black compact chassis with an aluminum heatsink, nickel-plated connections, and quick-disconnect wiring provisions. Its full-range Class D architecture, PWM MOSFET power supply, and Simpatico Coil Design are engineered for efficient operation in a small footprint. Three-stage LED protection diagnostics monitor thermal, overload, DC, and speaker-short conditions.\u003c\/p\u003e\u003cp\u003eInstall the amplifier in a secure, ventilated location away from direct water exposure, using appropriate power, ground, speaker, and RCA wiring. The installation guide identifies a 40-amp fuse and 8-gauge power cable for this model. Configure the front and rear channels for full-range or high-pass use, then use the dedicated low-pass-filtered fifth channel for a compatible subwoofer.\u003c\/p\u003e","brand":"MB Quart","offers":[{"title":"Default Title","offer_id":45633162018886,"sku":"NA2-500-5","price":326.24,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0048\/4163\/5910\/files\/81XNuUSyPCL.jpg?v=1784407183","url":"https:\/\/audiowatt.store\/products\/mb-quart-na2-500-5-five-channel-powersports-amplifier","provider":"Audio Watt Store","version":"1.0","type":"link"}