{"product_id":"boss-audio-ask904b-64-marine-6-5in-speakers-and-4-channel-amp","title":"BOSS Audio ASK904B.64 Marine 6.5in Speakers and 4-Channel Amp","description":"\u003cp\u003eIn this review of the BOSS Audio ASK904B.64 combo, the bottom line is simple: this kit is for buyers who want a compact, weather-resistant marine audio solution that can run without a head unit and deliver loud, full-range sound on a budget. The package pairs a 4-channel MC900B amplifier with two pairs of 6.5in MR6W speakers and adds Bluetooth streaming, a USB charging option and a waterproof remote pouch-making it a practical pick for boats, UTVs and open-air vehicles where ease of installation and wireless playback matter most.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e500 Watts Max Power:\u003c\/strong\u003e The MC900B provides up to 500 W max across four channels so small craft and off-road rigs can get high output when needed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBluetooth Ready:\u003c\/strong\u003e Built-in Bluetooth and an inline multifunction remote let users stream from phones and apps like Spotify without a separate head unit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFull Range Speakers:\u003c\/strong\u003e The included MR6W 6.5in speakers are full-range with polypropylene cones and rubber surrounds to reproduce a wide frequency range with decent durability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeather Resistant Design:\u003c\/strong\u003e Weatherproof connectors and components are intended to tolerate light marine conditions and occasional spray.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUSB Charging and Aux:\u003c\/strong\u003e A USB charging\/data adapter and auxiliary input give practical, modern connectivity for phones and MP3 players.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompact Amp Form Factor:\u003c\/strong\u003e The amplifier measures approximately 7.8 x 3.8 x 1.8 in and weighs about 2.9 lbs for flexible mounting in tight spaces.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis kit suits boat owners, anglers, and outdoors enthusiasts who want loud, easy-to-install sound without adding an in-dash head unit. If you need Bluetooth streaming, USB charging and a compact 4-channel amp that can drive a pair of full-range 6.5in speakers, this package covers those bases and keeps wiring straightforward.\u003c\/p\u003e\n\u003cp\u003eThose seeking audiophile-grade fidelity, extremely rugged military-spec marine gear, or long-term reliability assurances should consider higher-end sealed marine systems or separate premium components. Some buyers also reported mixed long-term reliability, so installers who expect daily heavy use should weigh professional installation and protection options.\u003c\/p\u003e\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eStrong perceived output for the size, making it easy to hear over wind and engine noise.\u003c\/li\u003e\n\u003cli\u003eBluetooth streaming and inline remote remove the need for a head unit for many setups.\u003c\/li\u003e\n\u003cli\u003eWeather-resistant connectors and rubber-surround speakers improve performance in damp conditions.\u003c\/li\u003e\n\u003cli\u003eGood value for the combination of amp plus two pairs of speakers and charging convenience.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSome users reported inconsistent long-term reliability, so durability may vary between units.\u003c\/li\u003e\n\u003cli\u003eNot built as a premium audiophile kit; sound quality is good for casual listening but not high-end critical listening.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eAmplifier Power\u003c\/td\u003e\n\u003ctd\u003e500 W max x 4 @ 4-Ohm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAmp Topology\u003c\/td\u003e\n\u003ctd\u003eClass A\/B full range\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAmp Dimensions\u003c\/td\u003e\n\u003ctd\u003e7.8 x 3.8 x 1.8 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpeaker Size\u003c\/td\u003e\n\u003ctd\u003e6.5 in full range (pair)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpeaker Power\u003c\/td\u003e\n\u003ctd\u003e180 W per pair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpeaker Frequency\u003c\/td\u003e\n\u003ctd\u003e80 Hz to 20 kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpeaker Sensitivity\u003c\/td\u003e\n\u003ctd\u003e89 dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe ASK904B.64 combo is a practical, budget-friendly marine audio kit that delivers surprising volume and easy Bluetooth playback without a head unit, making it a smart choice for casual boaters and off-road users. It offers clear value when installed correctly, but buyers who need long-term heavy-duty reliability or audiophile sound should consider higher-tier marine components.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eCan I use this without a head unit?\u003c\/strong\u003e\u003cbr\u003eYes. The amplifier supports Bluetooth streaming and a multifunction remote so you can power the amp and stream music directly from a phone.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAre the speakers waterproof?\u003c\/strong\u003e\u003cbr\u003eThe speakers are weather resistant with polypropylene cones and rubber surrounds; they are designed for light marine exposure but not full submersion.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes the amp support charging a phone?\u003c\/strong\u003e\u003cbr\u003eYes. The package includes a USB charging option so you can charge and play a USB-connected device while using the system.\u003c\/p\u003e","brand":"BOSS Audio Systems","offers":[{"title":"Default Title","offer_id":46754918662363,"sku":"B00VFZ09TG","price":168.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/81-CElty91L._SL1500.jpg?v=1747800127","url":"https:\/\/gearmusthave.com\/products\/boss-audio-ask904b-64-marine-6-5in-speakers-and-4-channel-amp","provider":"GearMustHave","version":"1.0","type":"link"}