{"product_id":"sky-high-car-audio-fxb-8004-4-channel-amplifier-4-ohm","title":"Sky High Car Audio FXB 800.4 | 4-Channel Amplifier 4 Ohm","description":"\u003ch1\u003eFXB-800.4\u003c\/h1\u003e\n\u003ch3\u003ePOWER @ 14.4V\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003e4-CHANNEL MODE\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-spread=\"false\"\u003e\n\u003cli\u003e\u003cstrong\u003e225W RMS × 4 @ 2 Ohms\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e130W RMS × 4 @ 4 Ohms\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e2-Ohm Minimum Impedance per Channel\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003e2-CHANNEL BRIDGED MODE\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-spread=\"false\"\u003e\n\u003cli\u003e\u003cstrong\u003e400W RMS × 2 @ 4 Ohms\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e260W RMS × 2 @ 8 Ohms\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e4-Ohm Minimum Bridged Impedance\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eHIGHLIGHTS\u003c\/h3\u003e\n\u003cul data-spread=\"false\"\u003e\n\u003cli\u003eCompact Class D full-range 4-channel amplifier\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e225W RMS × 4 @ 2 ohms\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e130W RMS × 4 @ 4 ohms\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFully bridgeable at 4 ohms\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e400W RMS × 2 bridged @ 4 ohms\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eOnly 5.39 inches long\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003ePerfect for motorcycle and powersports audio\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eExcellent for modern vehicle and OEM system integration\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003eUltra-fast switching design\u003c\/li\u003e\n\u003cli\u003e10V–16V operating range\u003c\/li\u003e\n\u003cli\u003e10Hz–25kHz full-range frequency response\u003c\/li\u003e\n\u003cli\u003eHPF \/ FULL \/ LP-BP crossover selection\u003c\/li\u003e\n\u003cli\u003e2-channel \/ 4-channel input selection\u003c\/li\u003e\n\u003cli\u003eMetal detent crossover potentiometers\u003c\/li\u003e\n\u003cli\u003eTiffany-style RCA connections\u003c\/li\u003e\n\u003cli\u003eReversible SHCA emblem\u003c\/li\u003e\n\u003cli\u003eLED power indicator\u003c\/li\u003e\n\u003cli\u003eClipping indicator\u003c\/li\u003e\n\u003cli\u003eProtection indicator\u003c\/li\u003e\n\u003cli\u003eFanless design\u003c\/li\u003e\n\u003cli\u003e85% efficiency at full power\u003c\/li\u003e\n\u003cli\u003e95 dB signal-to-noise ratio\u003c\/li\u003e\n\u003cli\u003e180 damping factor\u003c\/li\u003e\n\u003cli\u003e\u0026lt;0.1% THD\u003c\/li\u003e\n\u003cli\u003eThermal protection\u003c\/li\u003e\n\u003cli\u003eOverload protection\u003c\/li\u003e\n\u003cli\u003eDC output protection\u003c\/li\u003e\n\u003cli\u003eShort-circuit output protection\u003c\/li\u003e\n\u003cli\u003eVoltage input protection\u003c\/li\u003e\n\u003cli\u003e4-gauge power terminals\u003c\/li\u003e\n\u003cli\u003e10-gauge speaker output terminals\u003c\/li\u003e\n\u003cli\u003e90A fuse rating\u003c\/li\u003e\n\u003cli\u003eSHCA modular mounting ecosystem compatibility\u003c\/li\u003e\n\u003cli\u003eSHCA Universal Amp Key mounting options\u003c\/li\u003e\n\u003cli\u003ePassive cooling and color options\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eDIMENSIONS\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003e5.9\" W × 5.39\" L × 2.1\" H\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch2\u003eFOUR CHANNELS. 800+ WATTS. ALMOST NO SPACE.\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eSky High Car Audio FXB-800.4\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003etakes everything the FXB Series was created around and packs it into one of the smallest amplifiers in the lineup.\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003eMeasuring just\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e5.9\" × 5.39\" × 2.1\"\u003c\/strong\u003e, this ultra-compact Class D full-range 4-channel delivers\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e225 watts RMS × 4 at 2 ohms\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eand\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e130 watts RMS × 4 at 4 ohms at 14.4V\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003eThat's up to\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e900 watts RMS of combined 4-channel output\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003efrom an amplifier barely over 5 inches long.\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003eDon't let the compact size or reasonable price fool you.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003eThe FXB-800.4 was built to bring serious SHCA quality, power, flexibility, and installation options into the compact amplifier market without making you pay a premium just because the amplifier is small.\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003eThis isn't about making a cheaper amplifier smaller.\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003eIt's about putting real power where traditional amplifiers simply won't fit.\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch2\u003eBUILT FOR THE PLACES BIG AMPS CAN'T GO.\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003eSometimes you don't need 2,000 or 3,000 watts.\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003eYou need\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003efour channels of real power in almost no space.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003eThat's exactly where the FXB-800.4 shines.\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003eIts tiny footprint makes it perfect for\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003emotorcycle audio, powersports applications, modern vehicle integration, factory system upgrades, under-seat installations, behind-seat installs, hidden systems, and virtually any build where amplifier space is at a premium.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003eMotorcycle and powersports builds are an obvious fit. When every inch of installation space matters, getting four channels of serious output from a chassis barely over\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e5 inches long\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ecan completely change how a system is designed.\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003eModern cars and trucks present many of the same challenges. Factory electronics, limited mounting locations, tighter interiors, and increasingly complex OEM systems leave installers less room to work.\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003eThe FXB-800.4 lets you add real aftermarket power without turning amplifier placement into the biggest challenge of the installation.\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003eMaximum usable power. Minimum wasted space.\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch2\u003e225 WATTS. FOUR CHANNELS.\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003eSmall chassis doesn't mean small output.\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003eAt 2 ohms, the FXB-800.4 delivers:\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003e225 watts RMS × 4 channels at 14.4V.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003eAt 4 ohms, you still have:\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003e130 watts RMS × 4 channels at 14.4V.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003eThat gives you plenty of power for high-performance coaxials, component sets, midrange drivers, pro-audio speakers, or a combination of speakers in a custom system.\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003eAnd when four channels aren't what the build calls for:\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003eBridge it.\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch2\u003eFULLY BRIDGEABLE AT 4 OHMS.\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003eThe FXB-800.4 is\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003efully bridgeable at 4 ohms\u003c\/strong\u003e, giving you even more ways to use this little amplifier.\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003eIn 2-channel bridged mode, the FXB-800.4 produces:\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003e400 watts RMS × 2 at 4 ohms at 14.4V.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003eIt can also deliver:\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003e260 watts RMS × 2 at 8 ohms at 14.4V.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003eRun all four channels independently. Bridge a pair when you need additional power. Or bridge both channel pairs and turn this tiny 4-channel into a powerful 2-channel amplifier.\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003eFour channels when you need them. Serious bridged power when you don't.\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch2\u003eULTRA-FAST SWITCHING. FULL-RANGE PERFORMANCE.\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003eThe FXB-800.4 isn't just about fitting into small spaces.\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003eIts\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eultra-fast switching Class D design\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eprovides full-range frequency response from\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e10Hz to 25kHz\u003c\/strong\u003e, allowing it to reproduce the entire audible range needed for a wide variety of system designs.\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003eA selectable\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eHPF \/ FULL \/ LP-BP crossover control\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003egives installers the flexibility to configure the amplifier around the speakers it's powering, while the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e2-channel \/ 4-channel input selection switch\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ecan simplify signal routing in different system configurations.\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003eThe crossover section uses\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003emetal detent potentiometers\u003c\/strong\u003e, providing positive, repeatable adjustment points when dialing in the amplifier.\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003eAnd with\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eTiffany-style RCA connections\u003c\/strong\u003e, the FXB-800.4 brings features and hardware normally associated with much more expensive amplifiers into the FXB platform.\u003c\/p\u003e\n\u003ch2\u003eNO FAN REQUIRED.\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003eOne of the most interesting things about the FXB-800.4 is what it doesn't need.\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003eDespite its tiny chassis and impressive output, the FXB-800.4 is designed to operate\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003ewithout an internal cooling fan\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003eThat means no additional fan noise—something that can be particularly valuable in motorcycles, OEM integration, hidden installations, and systems where the amplifier may be mounted closer to the occupants.\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003eWith a rated\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e85% efficiency at full power\u003c\/strong\u003e, the compact Class D platform was designed to make efficient use of the space available.\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003eThe amplifier also includes\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003ethermal, overload, DC output, short-circuit, and voltage input protection\u003c\/strong\u003e, along with dedicated power, protection, and clipping indicators.\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003eSmall doesn't mean stripped down.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Sky High Car Audio","offers":[{"title":"Default Title","offer_id":50675143999746,"sku":"SHCA-FXB-800-4","price":214.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0611\/7333\/4274\/files\/SHCA-FXB-800-4.13__18546.webp?v=1791349016","url":"https:\/\/www.mooncarstereo.com\/products\/sky-high-car-audio-fxb-8004-4-channel-amplifier-4-ohm","provider":"Moon Car Stereo","version":"1.0","type":"link"}