{"product_id":"cicada-audio-flx2500-1-mono-motorcycle-amplifier","title":"Cicada Audio FLX2500.1 — Ultra-High-Power 1-Channel Class-D Motorcycle Subwoofer Amplifier (2,500W RMS @ 2Ω)","description":"\u003ch2\u003e2,500W mono. Serious sub output in the compact FLX chassis.\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eThe Cicada Audio FLX2500.1 is a high-output mono Class-D amplifier built for Harley-Davidson Touring — delivering 2,500W RMS at 2Ω in the compact FLX chassis format, with HPF and LPF crossover covering 10 Hz – 20 kHz. The step up from the FLX1600.1 for builds where maximum subwoofer or mid-bass output is the design objective. Requires a \u003ca href=\"\/products\/braille-green-lite-g30h-lithium-motorcycle-battery\"\u003elithium battery upgrade\u003c\/a\u003e and 2 AWG power wiring.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe FLX1600.1 delivers 1,600W mono with a standard 4 AWG install. The FLX2500.1 delivers 2,500W from the same compact chassis footprint — but the extra output demands more from the electrical system. A lithium battery is required to sustain the current draw without voltage sag at rated output, and 2 AWG is the minimum wire gauge for the power run. For builds where the electrical infrastructure is already committed and maximum subwoofer authority is the objective, the FLX2500.1 is the correct step up.\u003c\/p\u003e\n\u003ch3\u003eWho This Is For\u003c\/h3\u003e\n\u003cp\u003eFor riders who have committed to the electrical infrastructure required and are building the highest-output mono stage the compact FLX chassis delivers. The FLX2500.1 is the step up from the \u003ca href=\"\/products\/cicada-audio-flx1600-1-mono-motorcycle-amplifier\"\u003eFLX1600.1\u003c\/a\u003e for builds where 1,600W is the ceiling that needs to be broken — and where a \u003ca href=\"\/products\/braille-green-lite-g30h-lithium-motorcycle-battery\"\u003elithium battery upgrade\u003c\/a\u003e is already part of the plan. For builds requiring maximum output at any infrastructure cost, the \u003ca href=\"\/products\/cicada-audio-bfa5000-1-mono-motorcycle-amplifier\"\u003eBFA5000.1 delivers 5,000W at 2Ω\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch3\u003eWhat This Is Best For\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum-output subwoofer builds in compact enclosures\u003c\/strong\u003e — 2,500W at 2Ω drives a high-excursion subwoofer at the output levels where it was designed to operate. For saddlebag, Tour-Pak, or custom lower fairing enclosures where driver excursion is the limiting factor, this is the power supply.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-output mid-bass builds requiring sustained mono power\u003c\/strong\u003e — a purpose-built mid-bass enclosure in a saddlebag or Tour-Pak needs sustained high-current mono output, not bridged output from a 4-channel amp. The FLX2500.1 provides that from a dedicated channel at levels the FLX1600.1 cannot reach.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStep up from the FLX1600.1 in an existing multi-amp build\u003c\/strong\u003e — for builds already running a 4-channel amp plus a mono amp where the sub output needs to increase, the FLX2500.1 is the direct replacement for the FLX1600.1 when the electrical infrastructure is upgraded to match.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuilds with \u003ca href=\"\/products\/braille-green-lite-g30h-lithium-motorcycle-battery\"\u003elithium battery upgrade\u003c\/a\u003es already in place\u003c\/strong\u003e — the FLX2500.1's current demand makes a lithium battery mandatory. For builds where that upgrade is done, the FLX2500.1 uses the available current capacity correctly.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"maa-alert\"\u003e\n\u003ch3\u003eLithium Battery Upgrade and 2 AWG Wiring Required\u003c\/h3\u003e\n\u003cp\u003eThe FLX2500.1 requires a \u003ca href=\"\/products\/braille-green-lite-g30h-lithium-motorcycle-battery\"\u003elithium battery upgrade\u003c\/a\u003e and 2 AWG power and ground wiring from the supply to the amplifier. A standard factory Harley lead-acid battery cannot sustain the current demand of this amplifier at rated output. A 150A fuse is required on the power feed. Verify total system current load against the charging system's output before finalising the install.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch3\u003eThe Bottom Line\u003c\/h3\u003e\n\u003cp\u003e2,500W mono in the compact FLX chassis — the step up from the FLX1600.1 for builds that have committed to the electrical infrastructure and need more sub output.\u003c\/p\u003e\n\u003cp\u003eReady to upgrade? Add to cart above. For the same mono output at a lower infrastructure requirement, the \u003ca href=\"\/products\/cicada-audio-flx1600-1-mono-motorcycle-amplifier\"\u003eFLX1600.1 delivers 1,600W with 4 AWG wiring and no lithium requirement\u003c\/a\u003e. For maximum mono output beyond this level, the \u003ca href=\"\/products\/cicada-audio-bfa5000-1-mono-motorcycle-amplifier\"\u003eBFA5000.1 delivers 5,000W at 2Ω\u003c\/a\u003e.\u003c\/p\u003e\n\u003chr class=\"maa-tab-split\"\u003e\n\u003ch3\u003ePower Output — What the Numbers Mean\u003c\/h3\u003e\n\u003cp\u003eThe FLX2500.1 is rated at 2,500W at 2Ω at 14.4V — a fully charged, engine-running system with a lithium battery supplying clean, stable voltage at load. A lithium battery is important here specifically because it maintains voltage closer to the 14.4V rated condition under the sustained current draw of a mono amp at high output, where a lead-acid battery would sag and reduce actual output below the rated figure.\u003c\/p\u003e\n\u003cp\u003eNo separate 4Ω rating is published for the FLX2500.1. For builds running a 4Ω subwoofer, the \u003ca href=\"\/products\/cicada-audio-flx1600-1-mono-motorcycle-amplifier\"\u003eFLX1600.1\u003c\/a\u003e provides dual-impedance ratings and may be the more appropriate match depending on the driver specification.\u003c\/p\u003e\n\u003ch3\u003eCrossover and Signal Control\u003c\/h3\u003e\n\u003cp\u003eThe FLX2500.1 runs HPF and LPF crossover modes with a fixed 12 dB per octave slope. The HPF range covers 10–80 Hz — used as a subsonic filter protecting the driver from excursion below its usable frequency range. The LPF range covers 80 Hz – 20 kHz, providing the main crossover point for sub and mid-bass channel integration.\u003c\/p\u003e\n\u003cp\u003eThe LPF extending to 20 kHz allows the FLX2500.1 to operate as a full-range mono amplifier when the LPF is not engaged — relevant for custom single-driver builds or high-output single-channel applications outside of dedicated subwoofer use.\u003c\/p\u003e\n\u003cp\u003eInput sensitivity runs 0.2V – 12V, covering OEM Harley signal levels, standard RCA from aftermarket head units, and DSP pass-through line-level outputs.\u003c\/p\u003e\n\u003ch3\u003eSystem Integration\u003c\/h3\u003e\n\u003cp\u003eThe FLX2500.1 accepts high-level speaker output from the factory Harley Boom! Box radio directly — no additional converter required for 2014–2023 models — or low-level RCA from any aftermarket head unit or DSP pass-through output.\u003c\/p\u003e\n\u003cp\u003eTurn-on supports REM and DC offset modes. At 80A music-level current draw, the FLX2500.1 requires a lithium battery to sustain clean output at volume. Maximum draw is 260A; a 150A fuse is required on the power feed. For dual-amp installs adding the FLX2500.1 alongside a 4-channel amp, calculate total system current draw against the charging system's output before finalising the design.\u003c\/p\u003e\n\u003ch3\u003e2024+ Platform Notes\u003c\/h3\u003e\n\u003cp\u003eFor 2023.5 CVO and 2024+ Harley-Davidson Touring models running Skyline OS, the FLX2500.1 can be integrated as part of an aftermarket audio system when paired with a NAV-TV ZEN-H or ZEN-H Pro upstream in the signal chain. Without a ZEN-H or ZEN-H Pro, integration with a 2023.5 CVO or 2024+ Harley is not supported. For 2014–2023 models (excluding 2023.5 CVO), the high-level input connects directly to the factory Boom! Box radio.\u003c\/p\u003e\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHarley-Davidson Street Glide:\u003c\/strong\u003e Fairing amp tray or custom enclosure position.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHarley-Davidson Road Glide:\u003c\/strong\u003e Fairing amp tray or custom enclosure position.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHarley-Davidson Ultra Limited \/ Ultra Classic:\u003c\/strong\u003e Fairing amp rack or Tour-Pak position.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHarley-Davidson CVO models:\u003c\/strong\u003e Fairing amp rack or Tour-Pak position (see 2024+ note above for Skyline OS bikes).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHarley-Davidson Trike:\u003c\/strong\u003e Compatible — fairing, trunk, or saddlebag amp rack positions.\u003c\/li\u003e\n\u003cli\u003eCompatible with OEM Boom! Box radios (high-level input), all aftermarket head units (high-level or RCA), and DSP pass-through line-level outputs.\u003c\/li\u003e\n\u003cli\u003eRequires \u003ca href=\"\/products\/braille-green-lite-g30h-lithium-motorcycle-battery\"\u003elithium battery upgrade\u003c\/a\u003e and 2 AWG power and ground wiring.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eChannels\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1-Channel (Mono)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAmplifier Class\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eClass D\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower Output — 2Ω @ 14.4V\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2,500W RMS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eEfficiency\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e80%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSignal-to-Noise Ratio\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e86 dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTHD + N\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.1% (10% rated power)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTHD\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;0.5%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDamping Factor\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e200\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFrequency Response\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e10 Hz – 20 kHz (±3 dB)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHPF Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e10 Hz – 80 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLPF Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e80 Hz – 20 kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCrossover Slope\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e12 dB per octave\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInput Sensitivity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.2V – 12V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInputs\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHigh-level or Low-level RCA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTurn-On Modes\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eREM \/ DC Offset\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOperating Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e9V – 16V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCurrent Draw (Music)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e80A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCurrent Draw (Maximum)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e260A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRecommended Fuse\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e150A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMinimum Power Wire Gauge\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2 AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBattery Requirement\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003ca href=\"\/products\/braille-green-lite-g30h-lithium-motorcycle-battery\"\u003eLithium battery upgrade\u003c\/a\u003e required\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeather Resistance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eOutdoor-rated — moisture and vibration resistant\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e234 × 124 × 51 mm (9.2 × 4.9 × 2.0 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e","brand":"Cicada Audio","offers":[{"title":"Default Title","offer_id":50338049491191,"sku":"FLX2500.1","price":1365.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0901\/6505\/1639\/files\/Cicada-Audio-FLX2500_1-Ultra-High-Power-1-Channel-Class-D-Motorcycle-Subwoofer-Amplifier-2500W-RMS-2O.jpg?v=1779070228","url":"https:\/\/www.motorcycleaudio.com.au\/products\/cicada-audio-flx2500-1-mono-motorcycle-amplifier","provider":"Motorcycle Audio Australia","version":"1.0","type":"link"}