Reference Series · Amplifiers
Cicada Motorcycle Amplifiers Explained for Harley Touring Bikes
Quick answer: Cicada motorcycle amplifiers are compact Class-D designs built for the heat, vibration and limited electrical headroom of a Harley. For most 4-speaker touring builds the FLX700.4 is the sweet spot on a stock charging system; step up to the FLX1000.4 for more highway headroom, and to the FLX1400.4 or FLX2000.4 for horn speakers and high-output builds (which need heavier wiring and, at the top, lithium). Add a mono FLX1600.1 or FLX2500.1 for a subwoofer, or choose an FLX PRO model to get onboard DSP without a separate processor.
Motorcycle amplifiers are not car amplifiers. On a Harley you are dealing with wind and helmet noise, vibration, heat, limited mounting space, and an electrical system that quickly exposes inefficient power. Cicada amplifiers are designed specifically for these conditions: compact Class-D designs, realistic power delivery, and electrical requirements that align with how Harley touring bikes are actually ridden. This guide breaks down the current Cicada amplifier range, explains what each model is designed to do, and helps you choose the right amp based on riding style, speakers and electrical reality, not just watt numbers.
Quick Pick: Which Cicada Amp Do I Need?
- Simple front-only upgrade: FLX500.4 (8 AWG, stock battery OK)
- Clean 4-speaker touring upgrade: FLX700.4 (8 AWG, stock battery OK)
- More headroom for highway riding: FLX1000.4 (8 AWG, stock battery OK)
- High-output fairing and lids: FLX1400.4 (4 AWG required)
- Very loud systems: FLX2000.4 (4 AWG plus lithium required)
- Adding a subwoofer: FLX1600.1 or FLX2500.1
- Extreme or competition builds: BFA5000.1 (fully prepared bikes only)
- Tuning without a separate DSP: FLX700.4PRO or FLX1400.4PRO
How Much Power Do You Really Need on a Harley?
On a Harley the goal is not chasing the biggest watt number, it is clean headroom at your real riding volume. Too little power causes clipping and harshness at volume; too much power stresses wiring, batteries and charging systems. A properly matched amplifier sounds cleaner, runs cooler and is far more reliable than an oversized amp supported by an unprepared bike.
Cicada Amplifier Range
| Model | Type | Power (4Ω / 2Ω) | Primary role |
|---|---|---|---|
| FLX500.4 | 4-channel | 125W ×4 @2Ω | Front-stage or compact touring builds |
| FLX700.4 | 4-channel | 120W ×4 / 175W ×4 | Core touring amp |
| FLX1000.4 | 4-channel | 168W ×4 / 254W ×4 | More headroom for highway |
| FLX1400.4 | 4-channel | 225W ×4 / 350W ×4 | High-output builds |
| FLX2000.4 | 4-channel | 331W ×4 / 542W ×4 | Serious builds |
| FLX1600.1 | Mono | 1,600W RMS | Subwoofer power |
| FLX2500.1 | Mono | 2,500W RMS | High-power sub systems |
| BFA5000.1 | Mono | 5,000W RMS | Extreme / competition only |
| FLX700.4PRO | 4-ch + DSP | 120W ×4 / 175W ×4 | Built-in DSP, tuning without a separate processor |
| FLX1400.4PRO | 4-ch + DSP | 225W ×4 / 350W ×4 | High-output with built-in DSP control |
Wiring and Battery Requirements (Critical)
| Model | Min. wire gauge | Battery requirement |
|---|---|---|
| FLX500.4 | 8 AWG | Healthy stock system, if wired correctly (verify under load) |
| FLX700.4 | 8 AWG | Healthy stock system, if wired correctly (verify under load) |
| FLX1000.4 | 8 AWG | Healthy stock system, if wired correctly (verify under load) |
| FLX1400.4 | 4 AWG | Healthy stock system, if wired correctly (verify under load) |
| FLX2000.4 | 4 AWG | Lithium required |
| FLX1600.1 | 4 AWG | Lithium recommended |
| FLX2500.1 | 2 AWG | Lithium required |
| BFA5000.1 | 1/0 AWG | Multiple lithium batteries required |
| FLX700.4PRO | 8 AWG | Healthy stock system, if wired correctly (verify under load) |
| FLX1400.4PRO | 4 AWG | Healthy stock system, if wired correctly (verify under load) |
Cicada stocks Harley-specific power wiring kits to match each amp's current draw: for example HDPG8K (8 AWG) and HDPG6K (6 AWG) for lower-current single-amp systems (current MAA FLX700.4PRO systems use HDPG6K), HDPG4K (4 AWG) for FLX1400-class amps, and the HDPG2KD (2 AWG) for genuine dual- or triple-amplifier builds. Use the kit specified for the exact amplifier and complete kit rather than assuming one wire size per amplifier family.
FLX 4-Channel Amplifiers Explained
FLX500.4: Four Channels, Compact Footprint
The entry point in the FLX range. The FLX500.4 is a full 4-channel amp, the right choice for riders who want to upgrade the front stage now and have the option to connect rear speakers later without changing amps. It delivers 125W per channel at 2Ω in a compact chassis that is commonly used on a healthy stock electrical system, subject to charging output, other accessories, wiring and sustained use. A clean, sensible starting point before committing to a larger build.
FLX700.4: The Touring Sweet Spot
The FLX700.4 is the most common choice for Harley touring builds. It delivers clean, controlled power for fairing and saddlebag speakers without stressing a healthy factory charging system. If you are unsure where to start, this is the right starting point for most 4-speaker setups.
FLX1000.4: Same Size, More Headroom
Ideal for riders who spend long hours at highway speeds. The extra headroom keeps the system sounding relaxed rather than strained at volume, and it still is commonly used on a healthy stock electrical system, subject to charging output, other accessories, wiring and sustained use.
FLX1400.4: High Output Without Going Extreme
This is where systems start to feel genuinely powerful. Proper 4 AWG wiring is required, but the bike remains electrically manageable without a lithium upgrade. The right choice for CHX horn speakers and multi-position builds that need real headroom.
FLX2000.4: Serious Build Territory
Designed for riders who know they want big output. Cicada specifies lithium battery support here for a reason: this amp assumes the bike is prepared. If your system goals do not include horn-loaded speakers or sustained high-volume highway riding, the FLX700.4 or FLX1000.4 will often sound better on a stock electrical system.
Mono Amplifiers for Subwoofer Systems
FLX1600.1
A strong, efficient mono amplifier suited to most Harley saddlebag mid-bass and subwoofer builds. Pairs well with CMB10 drivers in a 10 inch saddlebag configuration.
FLX2500.1
High-power subwoofer amplifier requiring proper 2 AWG wiring and lithium support. Built for systems where sub output is a priority, not an afterthought.
BFA5000.1: Extreme Output Mono Amplifier
The BFA5000.1 is not a normal touring amplifier. It is intended for competition-level or showcase builds with fully prepared electrical systems: multiple lithium batteries, correct cabling, and a bike that has been built around the electrical load. Reality check: this amp is not suitable for stock or lightly upgraded Harley electrical systems.
Amplifiers With Built-In DSP: FLX PRO Models
FLX700.4PRO
The FLX700.4PRO matches the power output of the standard FLX700.4 but adds onboard DSP: same power, full tuning control. Crossovers, EQ, channel levels and time alignment are configurable via Cicada's DIALD software on a Windows PC. The right choice when you want DSP control without adding a separate processor to the install.
FLX1400.4PRO
Combines the higher output of the FLX1400.4 with built-in DSP capability. The correct amp for CHX horn speaker builds and CM component systems where precise crossover control is not optional. For complex multi-amp builds with separate front, rear and sub stages, a standalone DSP processor gives you more routing flexibility than a PRO amp. That decision is covered in the Cicada DSP guide.
Speaker Pairing Guidance
Cicada amplifiers are designed to work with Cicada speakers. General pairing guidance:
- FLX500.4: CXX and CX coaxials, a front-stage upgrade with rear expansion options
- FLX700.4 / FLX1000.4: most coaxial speaker builds, including CXX, CH and CHX in standard configurations
- FLX1400.4 / FLX2000.4: CHX horn speakers, CMB drivers and multi-position systems
- FLX700.4PRO / FLX1400.4PRO: CXK component kits and any build where crossover precision matters
- FLX1600.1 / FLX2500.1: CMB10 saddlebag mid-bass or dedicated subwoofer positions
For detailed speaker selection, impedance matching and fitment guidance, see the Cicada Motorcycle Speakers Guide.
Adding a Sub Later
All Cicada 4-channel amps can be bridged, but most riders choose to add a dedicated mono amp rather than bridge an existing one: keep your 4-channel amp running speakers, add an FLX1600.1 or FLX2500.1 for sub duty, and you get cleaner tuning and better electrical balance.
Don't Overbuy
If you are running standard coaxial speakers and riding suburban and regional roads, the FLX2000.4 is overkill, and it will stress a stock charging system doing it. Start with the FLX700.4 or FLX1000.4. Both are commonly run on a healthy stock Harley electrical system (subject to charging output, other accessories and use), both have enough headroom for genuine highway performance, and both are easy to build on later. You can always step up. You cannot undo undersized wiring or a battery that cannot keep up.
Shop this setup
Ready to choose a Cicada amplifier? Compare channel count, RMS output at the intended impedance, mounting dimensions, current demand and whether onboard DSP is required.
Not sure what fits your bike? Contact Motorcycle Audio Australia with your year, exact model, factory radio, current speaker locations and whether the bike has a factory amplifier, and we'll confirm the right parts →
Related Guides
- The Complete Cicada Audio Guide: full product range overview including speakers, DSP, complete kits and accessories
- Cicada Motorcycle Speakers Guide: CHX, CH, CXX, CM, CMB and CXK, which speaker line for which application
- Cicada DSP: Amps vs Standalone Processors: FLX PRO amps vs a standalone Cicada DSP processor
- Why Motorcycle Speakers Distort at Highway Speed: the physics behind power, clipping and what it means for amp selection
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