500W bridged front-stage system for 2014–2023 Harley Touring — FLX500.4 amplifier running bridged, CXX65.4 Pro Coaxial speakers, model-specific fit
The Cicada Audio 14FLXCXX-4X2 is the Pro Coaxial step-up from the standard CX front-stage system. Built around the same FLX500.4 4-channel Class-D amplifier but configured in bridged mode, it drives a pair of 4Ω CXX65.4 Pro Coaxial speakers with approximately 250W per speaker — significantly more headroom than the standard unbridged configuration. Select your model variant — Road Glide or Street Glide — and the kit ships with the correct model-specific amplifier rack and Cicada Audio branded grilles for your fairing platform.
This is a dedicated high-output front-stage system — bridged FLX500.4 amplifier and CXX65.4 Pro Coaxial speakers for the fairing positions. For the standard front-stage system with CX65.2 speakers, see the 14FLXCX-4X2.
Who This Is For
Riders on 2014–2023 Harley-Davidson® Touring platforms who want the Pro Coaxial front stage with maximum power delivery from the FLX500.4 platform. The 14FLXCXX-4X2 is the correct choice when CXX65.4 Pro Coaxial speakers and bridged amplifier output are the priority — a dedicated, high-output front-stage install. Every component is pre-matched and model-specific — select Road Glide or Street Glide at checkout and the correct rack and grilles are included.
What This Is Best For
- Bridged output — ~250W per speaker — the FLX500.4 runs in bridged mode, pairing two amp channels per speaker to deliver approximately 250W into each CXX65.4 4Ω driver. That is twice the power per speaker compared to the standard unbridged configuration — more headroom, more dynamics, and more clarity at highway volume.
- CXX65.4 Pro Coaxial — carbon matrix cone, higher sensitivity — the CXX65.4 uses a carbon matrix cone in place of standard IMPP: stiffer, lighter, and more consistent at sustained output levels. The larger voice coil delivers higher sensitivity and better projection into the airstream. The 4Ω impedance is specifically matched for this bridged application.
- Complete plug-and-play front-stage install — every required component is in the box: amplifier, speakers, power wiring, Harley-specific Molex® harnesses, model-specific amplifier rack, and branded fairing grilles. No sourcing individual parts, no compatibility research, no guesswork on installation day.
- 8 AWG wiring — works with stock electrical — the included HDPG8K 8 AWG power and ground kit is correctly sized for the FLX500.4's current draw and works with the factory Harley charging system. No battery upgrade required for this system configuration.
- Model-specific mounting hardware — the Road Glide variant includes the 14HDAR-RG amplifier rack and CHDRGG branded kidney grilles. The Street Glide variant includes the 14HDAR-SG rack and CHDSGG branded batwing grilles. Select your model at checkout — the correct hardware ships automatically.
Road Glide or Street Glide?
The amplifier, speakers, wiring, and harnesses are identical in both variants. What differs is the model-specific mounting hardware. The Road Glide variant includes the 14HDAR-RG amplifier rack and CHDRGG kidney grilles. The Street Glide variant includes the 14HDAR-SG amplifier rack and CHDSGG batwing grilles. Select the correct variant for your fairing platform before adding to cart. If you're unsure which model you have, the Road Glide has a shark-nose fairing; the Street Glide has a batwing fairing.
This System Requires a Radio Flash
Before installing any amplified audio upgrade on a 2014–2023 Harley-Davidson® Touring model, the factory Infotainment radio needs to be flashed. The stock firmware applies heavy EQ curves, dynamic compression, and output limiting tuned around the factory speaker system — these remain active after the amplifier is installed and will undercut everything this system does. Without the flash: bass collapses at volume, midrange becomes congested, highs turn brittle, and the FLX500.4 runs out of usable headroom well before its rated output. With the flash, the EQ and limiters are removed and the amplifier can do its job properly. A radio flash takes approximately 30 minutes and costs roughly $150–$300 AUD depending on provider. TechnoResearch is the most widely used option; any authorised Harley-Davidson® dealer with Screamin' Eagle® Flash tooling can also perform the service. The flash is required — not optional.
The Bottom Line
A complete, model-specific bridged front-stage system — FLX500.4 amplifier, CXX65.4 4Ω Pro Coaxial speakers, 8 AWG wiring, Molex® harnesses, amplifier rack, and branded grilles — everything required for a clean, high-output fairing installation in one box. Select Road Glide or Street Glide above and add to cart. For the standard front-stage system with CX65.2 speakers, see the 14FLXCX-4X2.
Fitment
| Model | Position | Years |
|---|---|---|
| Street Glide® / Street Glide® Special | Front fairing | 2014–2023 |
| Road Glide® / Road Glide® Special / Road Glide® Ultra | Front fairing | 2015–2023 |
| Electra Glide® / Ultra Limited® | Front fairing | 2014–2023 |
| Tri Glide® Ultra | Front fairing | 2014–2023 |
System Overview
| Amplifier | FLX500.4 — 4-Channel Class-D Motorcycle Amplifier (bridged) |
| Amp Configuration | Bridged — ~250W × 2 @ 4Ω |
| Front Speakers | CXX65.4 — 6.5″ Pro Coaxial Speakers (4Ω, pair) |
| Speaker Impedance | 4Ω — matched for bridged amp output |
| Power Wiring | HDPG8K — 8 AWG fused power and ground kit |
| Input Harness | HDFiMY — H-D® front radio-to-amp Molex® Y-harness (pair) |
| Output Harness | HDFLXFo — H-D® FLX amplifier front output Molex® harness |
| Road Glide Rack | 14HDAR-RG — Road Glide® amplifier mounting rack (2014–2023) |
| Road Glide Grilles | CHDRGG — Cicada Audio branded kidney grilles (pair) |
| Street Glide Rack | 14HDAR-SG — Street Glide® amplifier mounting rack (2014–2023) |
| Street Glide Grilles | CHDSGG — Cicada Audio branded batwing grilles (pair) |
| Platform | Harley-Davidson® Touring (2014–2023) |
| DSP | Not required — optional DSP expansion available |
The FLX500.4 Amplifier — Bridged Configuration
The FLX500.4 is a 4-channel Class-D amplifier designed for Harley-Davidson® Touring fairing installations. In the 14FLXCXX-4X2, it runs in bridged mode — pairing channels 1 and 2 to drive the left CXX65.4, and channels 3 and 4 to drive the right CXX65.4. Bridged into the 4Ω load of the CXX65.4, the amp delivers approximately 250W per speaker — double the output of the standard unbridged configuration. On the road: the bridged FLX500.4 delivers noticeably more headroom at highway speed. With pipes and wind in the mix, the increased output keeps the front stage projecting clearly without the amp being pushed into its upper limits. The difference is audible at volume.
The CXX65.4 Speakers
The CXX65.4 is Cicada Audio's 6.5″ Pro Coaxial speaker at 4Ω — the correct impedance for this bridged application. The carbon matrix cone is stiffer and lighter than IMPP, maintaining linear excursion at higher output levels and reducing cone flex that bleeds power into heat rather than sound. The voice coil is wound for higher sensitivity — more acoustic output per watt of amplifier input. On the road: the CXX65.4 projects vocals and midrange with more authority from the fairing position. At highway speed, where the standard CX series starts to lose intelligibility in the wind, the CXX maintains clarity further up the volume curve. Paired with approximately 250W of bridged output, the Pro Coaxials reach volume levels that remain useful well above 60 mph.
Why 8 AWG Wiring
The HDPG8K 8 AWG power and ground kit is correctly matched to the FLX500.4's current draw profile — even in bridged mode, a 500W Class-D amplifier at music-level signal demand draws well within 8 AWG capacity. Running 4 AWG wiring on a system that doesn't require it adds cost and installation complexity without benefit. On the road: no voltage drop, no thermal stress on the wiring, no need to return to the install to address an undersized supply. The HDPG8K is sized for this system and does the job cleanly.
Radio Flash — Required Before Installation
The 2014–2023 Harley-Davidson® Infotainment radio ships from the factory with firmware tuned around the stock speaker system. That firmware applies significant EQ curves to compensate for the limitations of factory speakers, dynamic compression to manage volume levels, bass roll-off as volume climbs, and output limiting that caps usable signal before the amplifier can act on it properly. None of this is removed when you add an amplifier — the processed, limited signal goes into the FLX500.4's input exactly as it came out of the head unit.
The result without a flash: the FLX500.4 amplifies a signal that has already been compressed, EQ-adjusted, and capped. Bass collapses at highway volume, midrange sounds congested, and the system runs out of headroom well before the amplifier's rated output. On the road: the performance gap between a flashed and unflashed Harley radio on this install is not subtle — it is the difference between the system working and the system not working.
With a flash, the EQ curves, compression, and limiters are removed. The radio sends a clean, unprocessed signal to the amplifier, and the FLX500.4 operates on signal it can actually work with. A radio flash takes approximately 30 minutes and costs around $150–$300 AUD depending on provider. TechnoResearch is the most widely used flash service for this application; any authorised Harley-Davidson® dealer with Screamin' Eagle® Flash tooling can also perform the service. Book the flash before or on the same day as installation.
In the Box
All variants include:
- FLX500.4 — 4-channel Class-D amplifier (bridged: ~250W × 2 @ 4Ω)
- CXX65.4 — 6.5″ Pro Coaxial speakers, 4Ω (pair)
- HDPG8K — 8 AWG fused power and ground wiring kit
- HDFiMY — H-D® front radio-to-amplifier Molex® Y-harness (pair)
- HDFLXFo — H-D® FLX amplifier front output Molex® harness
Road Glide variant additionally includes:
- 14HDAR-RG — CX/DSP/FLX Amplifier Mounting System — H-D® Road Glide® (2014–2023)
- CHDRGG — Cicada Audio branded kidney grilles (pair)
Street Glide variant additionally includes:
Australia Shipping:
- Under $500 → $19.95
- $500–$2,500 → $14.95
- Over $2,500 → FREE
- Bulky items → +$24.95 surcharge (waived over $2,500)
Fast dispatch from Brisbane. Same-day shipping on in-stock orders before 1pm AEST.
Change-of-mind returns: We accept returns within 7 days of delivery on unused, unopened products in original sealed packaging. Restocking fees apply (20–30%). Return shipping is the customer's responsibility.
No returns on opened audio gear, installed items, custom orders, or special-order products. Please check fitment carefully before installing.
Faulty or incorrect items: If you experience an issue, contact us with photos/video and your order number. We'll assess the claim and arrange repair, replacement, or refund for verified faults under the Australian Consumer Law.
Fitment assistance: If you're unsure about compatibility, reach out before ordering—we're happy to help.