| Configuration | 4 in / 12 out |
| Year Range | 1998-2013, 2014-2023, 2024+ |
A high-output system without signal control is just a high-output problem.
The Cicada Audio DSP412PRO is a purpose-built 12-channel digital signal processor for motorcycle audio — delivering 24-bit / 96 kHz processing, three professional crossover filter topologies, and full DIALD™ tuning via Windows PC in an IP65-rated UMC™ chassis designed to fit standard Harley Touring fairing positions.
Fairing-mounted speakers sit at fixed positions that were never designed around acoustic performance. Left and right speakers are at different distances from the rider's ears. Tweeters and midrange drivers occupy whatever mounting geometry the fairing allows — not where speaker placement theory says they should go. Without time alignment and equalisation correcting for those constraints, a high-output system will produce a soundstage that is off-centre and spectrally uneven regardless of the amplifier or speakers involved. The DSP412PRO is the signal control layer that sits between the source and the amplifiers — shaping the signal, correcting for mounting geometry, managing driver separation, and delivering a controlled, tuned output to each amplifier channel.
Who This Is For
For builders who want a properly tuned system, not just a loud one — and who are running multi-driver stages, multiple amplifiers, or active component builds where amp-level crossover control is no longer enough. The DSP412PRO is the correct pairing upstream of any FLX-series amplifier where per-channel EQ, time alignment, and independent crossover control are part of the system design. For builds requiring 8 inputs and 8 outputs rather than 4 in and 12 out, the DSP88v2 is the alternative configuration.
What This Is Best For
- Multi-amplifier Harley Touring builds — the selectable 4, 8, or 12 output configuration handles single and multi-amp layouts from one unit. Route front stage, rear stage, mid-bass, and subwoofer channels independently without running out of outputs.
- Active front stage builds with dedicated tweeters and midrange drivers — independent crossover control per driver is what active biamping requires. With 12 outputs, the DSP412PRO handles active tweeters and woofers for fairing and lids, a mid-bass channel, and Tour-Pak speakers simultaneously.
- Builds requiring Linkwitz-Riley crossover at 24 or 48 dB/octave — three selectable filter topologies (Butterworth, Linkwitz-Riley, Bessel) cover the full range of driver separation requirements where a single-architecture DSP cannot. LR48 for clean horn tweeter / midrange isolation; Butterworth for coaxial builds; Bessel for phase-linear transient accuracy.
- Upgrades from amp-level crossover control — replacing onboard amp crossovers with the DSP412PRO provides repeatable, software-defined tuning that is adjustable without touching the hardware installation. Settings are stored on the unit and persist without the laptop present.
- Builds pairing with FLX-series amplifiers — the DSP412PRO operates as the signal processing and routing hub upstream of one or more FLX amps. Output flexibility supports any FLX configuration from the FLX500.4 to the FLX2000.4.
- Installers managing multiple builds — DIALD™ settings are saveable and transferable, allowing a tuned configuration to be loaded into a replacement unit or a new build without reconstructing the tune from scratch.
DIALD™ Tuning Requires a Windows PC
The DSP412PRO is tuned via DIALD™ software on Windows 11 Home or Pro — a standard PC or laptop is required. DIALD is not compatible with MacBooks, iPads, Chromebooks, or mobile phones. There is no current smartphone app — the previous Cicada DSP phone app is no longer supported and should not be used with this unit.
The Bottom Line
Twelve output channels, three crossover filter topologies, and a tuning platform built around software precision — not hardware trim pots. The DSP412PRO is the signal control layer that makes a high-output system perform as well as it measures.
Ready to upgrade? Add to cart above. The DSP412PRO pairs upstream of any FLX-series amplifier — use the HDPG4K input harness for direct Boom! Box integration on 2014–2023 models. For builds that need 8 inputs and 8 independent outputs instead of 4 in and 12 out, the DSP88v2 is the alternative.
Signal Processing
The DSP412PRO processes at 24-bit / 96 kHz — the standard for hi-resolution audio. At 91 dB signal-to-noise ratio (A-weighted, 20 Hz – 20 kHz), the DSP's own noise floor is well below the contribution from the motorcycle environment, the amplifiers downstream, or the speakers themselves. The processing chain is not a limiting factor in the signal path.
Frequency response is flat within ±3 dB across the full 20 Hz – 20 kHz audio band. The DSP adds no audible colouration — it modifies the signal precisely where the tune requires it and passes everything else cleanly. A built-in noise gate in the DIALD™ software eliminates the electrical hiss common in motorcycle charging systems the moment music stops, without requiring hardware adjustment.
Crossover and Tuning Control
The DSP412PRO supports LPF and HPF crossover modes across three filter topologies: Butterworth, Linkwitz-Riley, and Bessel. Each behaves differently at the crossover frequency and through the rolloff region. Selecting the correct topology for the driver combination in use — rather than accepting a fixed-filter DSP — is what allows precise driver separation across different system architectures.
Slope options run from 6 to 48 dB per octave. At 48 dB/octave Linkwitz-Riley, the separation between a horn tweeter and a midrange driver is clean enough that both operate well within their designed passband with minimal overlap. At 6 dB/octave, the gradual rolloff suits full-range or wideband applications where a gentle transition is preferred.
All tuning is handled through the DIALD™ software platform on a Windows PC via the included USB-C to USB-A cable. DIALD provides full parameter control across EQ (12 bands per channel), crossovers, time alignment, phase, polarity, and gain structure. Remote turn-on delay is adjustable in the software from 1 to 30 seconds — pop prevention without removing the fairing. Settings are stored on the unit and persist without the laptop present during operation.
Input gain range covers 0.2V – 12V, handling both OEM Harley signal levels and standard RCA output from aftermarket head units without a line driver.
System Integration
The DSP412PRO sits between the source and the amplifiers. It accepts signal via optional harnesses — available for Harley-Davidson® factory connectors, RCA, and Cicada Molex® input systems — covering the most common source configurations without cutting or splicing factory wiring.
Turn-on supports REM and DC offset detection. A remote output trigger is included for downstream amplifier control — the DSP412PRO operates as the master trigger point in a multi-amplifier system, with a single remote output line triggering all downstream amplifiers.
Output channel count is selectable at 4, 8, or 12 — configured in DIALD to match the amplifier layout downstream. Unused output pigtails can be disconnected and removed from the fairing, keeping the harness compact in a 4-channel build. In a full 12-channel configuration, outputs are grouped in three pairs of four — channels 1–4, 5–8, and 9–12 — allowing each harness section to be routed independently.
The UMC™ chassis at 28 × 98 × 67 mm fits in fairing spaces where larger DSP formats will not — including the gap between the instrument cluster and amplifier plate on a Street Glide running two FLX-series amplifiers.
2024+ Platform Notes
For 2023.5 CVO and 2024+ Harley-Davidson Touring models running Skyline OS, the DSP412PRO can be integrated as part of an aftermarket audio system when paired with a NAV-TV ZEN-H. The ZEN-H handles the Skyline OS signal interface — the DSP412PRO then receives the processed output, applies tuning and signal routing, and passes the result to the downstream amplifiers.
The NAV-TV ZEN-H Pro is not the correct pairing for this application — the ZEN-H Pro includes an integrated DSP, which makes adding a standalone DSP412PRO redundant. Use the ZEN-H (not ZEN-H Pro) when the DSP412PRO is in the signal chain.
Without a NAV-TV ZEN-H, integration with a 2023.5 CVO or 2024+ Harley is not supported. For 2014–2023 models (excluding 2023.5 CVO), the DSP412PRO connects to the factory Boom! Box radio via the optional Harley-Davidson® factory connector input harness.
Fitment
- Harley-Davidson Street Glide: Batwing fairing — fits standard fairing DSP mounting positions, including the gap between the instrument cluster and amplifier plate when running dual FLX-series amps.
- Harley-Davidson Road Glide: Shark nose fairing — fits standard DSP mounting positions.
- Harley-Davidson Ultra Limited / Ultra Classic: Fits fairing mounting positions.
- Harley-Davidson CVO models: Fits fairing mounting positions (see 2024+ note above for Skyline OS bikes).
- Harley-Davidson Trike: Compatible — fits fairing, trunk, or saddlebag amp rack positions.
- Compatible with OEM Boom! Box radios via optional Harley-Davidson® factory connector input harness, and all aftermarket head units via RCA or Cicada Molex® input harness.
- Output channels selectable: 4, 8, or 12 — configure for the amplifier layout in the build.
Technical Specifications
| Input Channels | 2 or 4 (selectable) |
| Output Channels | 12 (selectable: 4, 8, or 12) |
| Processing Resolution | 24-bit / 96 kHz |
| Frequency Response | 20 Hz – 20 kHz (±3 dB) |
| Signal-to-Noise Ratio | 91 dB (A-weighted, 20 Hz – 20 kHz) |
| EQ Bands | 12 bands per channel |
| Crossover Types | LPF / HPF — Butterworth, Linkwitz-Riley, Bessel |
| Crossover Frequency Range | 20 Hz – 10 kHz |
| Crossover Slope | 6 / 12 / 24 / 48 dB per octave |
| Time Alignment | 0–468.4 cm (0–184.4 in) — step: 2.8 cm / 0.08 ms |
| Input Sensitivity | 0.2V – 12V |
| Tuning Interface | DIALD™ — Windows 11 Home or Pro (via USB-C). No smartphone app. |
| Turn-On Modes | REM / DC Offset |
| Remote Output | Yes — trigger output for downstream amplifiers |
| Turn-On Delay | 1–30 seconds (adjustable in DIALD) |
| Noise Gate | Yes — software-controlled via DIALD |
| Operating Voltage | 9V – 16V |
| Current Draw | 0.7A operating — 1A fuse recommended |
| Weather Resistance | IP65 — Rain or Shine® rated, moisture and dust resistant |
| Chassis | UMC™ Ultra Micro Chassis |
| Dimensions | 28 × 98 × 67 mm (1.1 × 3.8 × 2.6 in) |
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.