{"product_id":"jl-audio-ap300-1-300w-monoblock-marine-amplifier","title":"JL Audio AP300\/1 300W Monoblock Marine Amplifier","description":"\u003cp class=\"nvn-hero\"\u003eThe JL Audio AP300\/1 is an ultracompact monoblock marine amplifier built to drive a subwoofer. Its Class-D design delivers up to 350 watts at 2 ohms with low battery drain, and an IP67-rated chassis stands up to spray, humidity and real saltwater duty.\u003c\/p\u003e\n\n\u003cdiv class=\"nvn-description\"\u003e\n\u003cp\u003eIf your boat's stereo sounds thin the moment you open the throttle, the JL Audio AP300\/1 is the fix. It's a single-channel (monoblock) marine amplifier built for one job and built to do it well: powering a subwoofer so you finally get the deep, physical bass that factory head units and small speakers just can't produce over wind and engine noise. This is the low end you feel in the deck, not just hear.\u003c\/p\u003e\n\u003cp\u003eThe AP300\/1 uses Class-D amplifier technology, and that matters on the water. Class-D is far more efficient than older Class-AB designs, so it pulls less current from your battery while delivering more usable output to the sub. On a boat where every amp-hour counts, that efficiency means you can run your system longer at anchor without worrying about a dead start battery. It puts out 200 watts RMS into a 4-ohm load and up to 350 watts RMS into 2 ohms, so there's real muscle here for a compact chassis.\u003c\/p\u003e\n\u003cp\u003eTuning is refreshingly simple. The input sensitivity is switchable between a Low range (200 mV to 2 V RMS) and a High range (800 mV to 8 V RMS), so the amp plays nicely whether you're feeding it a low-level RCA signal or a higher-voltage output. When you pair it with a compatible marine source unit that has built-in digital signal processing, you can dial in a matched profile through the source unit's app, which streamlines setup and helps protect the system from over-driving. If you'd rather set it and forget it, the onboard gain controls get you there too.\u003c\/p\u003e\n\u003cp\u003eDurability is where a marine amp earns its keep, and the AP300\/1 is rated to IP67 standards (excluding the cables). That means it's protected against dust and can handle temporary immersion, so bilge splash, a rogue wave over the gunwale, or a wet locker install won't kill it. The operating range runs from -20 to 65 degrees C (4 to 149 degrees F), covering everything from a frosty spring launch to a black-hot engine bay in July. JL Audio builds these to take abuse, and the 3-year warranty backs that up.\u003c\/p\u003e\n\u003cp\u003eThe physical footprint is genuinely small at 10.43 inches wide, 4.90 inches deep and just 1.86 inches tall, so it tucks under a console, behind a seat, or inside a helm cabinet where space is always tight. It runs on a standard 9 to 16 VDC system and draws only 700 to 750 mA in standby, so it won't quietly drain your bank when the stereo is off.\u003c\/p\u003e\n\u003cp\u003eInstallation is straightforward for anyone comfortable running power. JL Audio specifies a minimum of 4 AWG copper for the power and ground runs, a 35-amp fuse, and AFS, AGU or MaxiFuse fuse types. The amp also protects itself: built-in circuits guard against input under-voltage and over-voltage, over-temperature, and an output short circuit, so a wiring slip or a hot day won't leave you with a fried amp.\u003c\/p\u003e\n\u003cp\u003eWe like this amp for the boater who already has decent full-range speakers but wants the bottom octave back. Add a marine sub, wire in the AP300\/1, and the whole system snaps into balance. You're not chasing volume anymore, you're getting depth and clarity at the levels you actually listen at. Inside the box you'll find the amplifier, four mounting screws, and the documentation, so you're ready to plan your install right away.\u003c\/p\u003e\n\u003cp\u003eThink about the trips this changes. A slow cruise into a quiet cove where a full-range track finally has body behind it. A raft-up with friends where the music holds up over the chatter and the wind. A long run home at dusk where the low end fills the cockpit instead of getting lost in the engine drone. That's what a dedicated sub amp buys you, and the AP300\/1 delivers it in a package small enough to forget it's even there. For a rugged, efficient, no-drama sub amp that disappears into your rigging and just works season after season, the AP300\/1 is an easy call.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul class=\"nvn-features\"\u003e\n  \u003cli\u003e300-watt monoblock design purpose-built to power a single marine subwoofer\u003c\/li\u003e\n  \u003cli\u003eUp to 350 watts RMS into 2 ohms and 200 watts RMS into 4 ohms\u003c\/li\u003e\n  \u003cli\u003eEfficient Class-D circuitry draws less battery current than Class-AB amps\u003c\/li\u003e\n  \u003cli\u003eIP67-rated chassis (excluding cables) resists dust, spray and temporary immersion\u003c\/li\u003e\n  \u003cli\u003eSwitchable input sensitivity, Low 200 mV-2 V or High 800 mV-8 V RMS, for clean gain matching\u003c\/li\u003e\n  \u003cli\u003eWorks with a compatible DSP-equipped source unit for app-based profile tuning\u003c\/li\u003e\n  \u003cli\u003eUltracompact 10.43 x 4.90 x 1.86 in body fits tight console and helm spaces\u003c\/li\u003e\n  \u003cli\u003eFull protection suite, input under\/over-voltage, over-temperature and output short circuit\u003c\/li\u003e\n  \u003cli\u003eBacked by a 3-year warranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cdiv class=\"nvn-trust\"\u003e\n  \u003ch2\u003eWhy Buy from NVN Marine\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eAuthorized JL Audio reseller, full manufacturer warranty\u003c\/li\u003e\n    \u003cli\u003eNMEA member and ABYC certified, advice from real boat techs\u003c\/li\u003e\n    \u003cli\u003eSame-day shipping before 3 PM ET on in-stock items\u003c\/li\u003e\n    \u003cli\u003eNY headquarters and Fort Lauderdale flagship retail store\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdiv class=\"nvn-faq\"\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat is the AP300\/1 designed to power?\u003c\/summary\u003e\n    \u003cp\u003eIt's a monoblock (single-channel) amplifier built specifically to drive a subwoofer. It delivers the deep bass that factory head units and small full-range speakers can't produce, so it's the ideal add-on when you want to feel the low end on the water.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow much power does the AP300\/1 actually put out?\u003c\/summary\u003e\n    \u003cp\u003eIt's rated for 200 watts RMS into a 4-ohm load and up to 350 watts RMS into a 2-ohm load, both measured at 14.4 volts with under 1 percent distortion. That's plenty to drive a single marine subwoofer with real authority.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eIs this amplifier waterproof enough for an open boat?\u003c\/summary\u003e\n    \u003cp\u003eYes. The chassis is built to IP67 standards, excluding the cables, which means it resists dust and can survive temporary immersion. Bilge splash, spray over the gunwale, or a damp locker install won't harm it, though you should still mount it in a sensible, drainable spot.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhy choose Class-D over a Class-AB amplifier?\u003c\/summary\u003e\n    \u003cp\u003eClass-D is much more efficient, so it draws less current from your battery while delivering more usable output. On a boat that translates to longer listening at anchor and less strain on your electrical system, with less heat produced during operation.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat wiring and fuse does the AP300\/1 need?\u003c\/summary\u003e\n    \u003cp\u003eJL Audio specifies a minimum of 4 AWG copper for both the power and ground runs, plus a 35-amp fuse. Recommended fuse types are AFS, AGU or MaxiFuse. Proper gauge wire and an inline fuse near the battery are essential for safe operation.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eCan I fine-tune the amplifier to match my stereo?\u003c\/summary\u003e\n    \u003cp\u003eYes. Input sensitivity switches between a Low range of 200 mV-2 V and a High range of 800 mV-8 V RMS, so it matches almost any source. If you run a compatible source unit with built-in DSP, you can also load a matched profile through that unit's app for quick, protected setup.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow small is it, and where can I mount it?\u003c\/summary\u003e\n    \u003cp\u003eIt measures 10.43 inches wide, 4.90 inches deep and just 1.86 inches tall, so it fits under a console, behind a seat, or inside a helm cabinet. Mount it where it can shed water and get some airflow, and keep the wiring runs as short as practical.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eDoes it protect itself against wiring or heat problems?\u003c\/summary\u003e\n    \u003cp\u003eIt does. Built-in protection circuits cover input under-voltage and over-voltage, over-temperature, and an output short circuit. Combined with the IP67 rating and a 3-year warranty, it's designed to survive the real conditions boats see.\u003c\/p\u003e\n  \u003c\/details\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable class=\"nvn-specs\"\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003cth\u003eTitle\u003c\/th\u003e\n\u003ctd\u003eJL Audio AP300\/1 300W Monoblock Marine Amplifier\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eJL Audio\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eManufacturer Part Number\u003c\/th\u003e\n\u003ctd\u003e010-03428-00\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eUPC\u003c\/th\u003e\n\u003ctd\u003e729218924518\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eAmplifier Type\u003c\/th\u003e\n\u003ctd\u003eMonoblock (single channel)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eAmplifier Class\u003c\/th\u003e\n\u003ctd\u003eClass-D\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eRated Power (4 ohm)\u003c\/th\u003e\n\u003ctd\u003e200 W RMS x 1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eRated Power (2 ohm)\u003c\/th\u003e\n\u003ctd\u003e350 W RMS x 1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eFrequency Response\u003c\/th\u003e\n\u003ctd\u003e10 Hz to 500 Hz (+0, -1 dB)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eSignal-to-Noise Ratio\u003c\/th\u003e\n\u003ctd\u003eGreater than 70 dB (A-weighted)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eInput Sensitivity\u003c\/th\u003e\n\u003ctd\u003eSwitchable, Low 200 mV-2 V or High 800 mV-8 V RMS\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eOperating Voltage\u003c\/th\u003e\n\u003ctd\u003e9 to 16 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eStandby Current\u003c\/th\u003e\n\u003ctd\u003e700 to 750 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eFuse Rating\u003c\/th\u003e\n\u003ctd\u003e35 A (AFS, AGU or MaxiFuse)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eMinimum Power\/Ground Wire\u003c\/th\u003e\n\u003ctd\u003e4 AWG copper\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eWater and Dust Rating\u003c\/th\u003e\n\u003ctd\u003eIP67 (excluding cables)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eOperating Temperature\u003c\/th\u003e\n\u003ctd\u003e-20 to 65 C (4 to 149 F)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eDimensions (W x D x H)\u003c\/th\u003e\n\u003ctd\u003e10.43 x 4.90 x 1.86 in (265 x 125 x 47 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eProtection Circuits\u003c\/th\u003e\n\u003ctd\u003eInput under\/over-voltage, over-temperature, output short circuit\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eWarranty\u003c\/th\u003e\n\u003ctd\u003e3 years\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eIn the Box\u003c\/th\u003e\n\u003ctd\u003eAmplifier, four mounting screws, documentation\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n    \"@context\": \"https:\/\/schema.org\",\n    \"@type\": \"FAQPage\",\n    \"mainEntity\": [\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What is the AP300\/1 designed to power?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"It's a monoblock (single-channel) amplifier built specifically to drive a subwoofer. It delivers the deep bass that factory head units and small full-range speakers can't produce, so it's the ideal add-on when you want to feel the low end on the water.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"How much power does the AP300\/1 actually put out?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"It's rated for 200 watts RMS into a 4-ohm load and up to 350 watts RMS into a 2-ohm load, both measured at 14.4 volts with under 1 percent distortion. That's plenty to drive a single marine subwoofer with real authority.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Is this amplifier waterproof enough for an open boat?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Yes. The chassis is built to IP67 standards, excluding the cables, which means it resists dust and can survive temporary immersion. Bilge splash, spray over the gunwale, or a damp locker install won't harm it, though you should still mount it in a sensible, drainable spot.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Why choose Class-D over a Class-AB amplifier?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Class-D is much more efficient, so it draws less current from your battery while delivering more usable output. On a boat that translates to longer listening at anchor and less strain on your electrical system, with less heat produced during operation.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What wiring and fuse does the AP300\/1 need?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"JL Audio specifies a minimum of 4 AWG copper for both the power and ground runs, plus a 35-amp fuse. Recommended fuse types are AFS, AGU or MaxiFuse. Proper gauge wire and an inline fuse near the battery are essential for safe operation.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Can I fine-tune the amplifier to match my stereo?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Yes. Input sensitivity switches between a Low range of 200 mV-2 V and a High range of 800 mV-8 V RMS, so it matches almost any source. If you run a compatible source unit with built-in DSP, you can also load a matched profile through that unit's app for quick, protected setup.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"How small is it, and where can I mount it?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"It measures 10.43 inches wide, 4.90 inches deep and just 1.86 inches tall, so it fits under a console, behind a seat, or inside a helm cabinet. Mount it where it can shed water and get some airflow, and keep the wiring runs as short as practical.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Does it protect itself against wiring or heat problems?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"It does. Built-in protection circuits cover input under-voltage and over-voltage, over-temperature, and an output short circuit. Combined with the IP67 rating and a 3-year warranty, it's designed to survive the real conditions boats see.\"\n            }\n        }\n    ]\n}\n\u003c\/script\u003e\n","brand":"JL Audio","offers":[{"title":"Default Title","offer_id":44785207640157,"sku":"1004513","price":499.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0299\/7266\/0317\/files\/JLA0100342800.jpg?v=1784917595","url":"https:\/\/nvnmarine.com\/products\/jl-audio-ap300-1-300w-monoblock-marine-amplifier","provider":"NVN Marine","version":"1.0","type":"link"}