Cicada Audio BFA5000.1 – Extreme-Power 1-Channel Class-D Motorcycle Subwoofer Amplifier (5,000W RMS @ 2Ω)

Power Output – What the Numbers Mean

The BFA5000.1 is rated at 3,000W at 4Ω and 5,000W at 2Ω at 14.4V – a supply voltage that assumes a high-capacity lithium battery maintaining stable voltage under the sustained current draw this amplifier produces at rated output. At music-level draw of 200A, voltage stability at the amplifier terminals is directly dependent on the quality of the battery, the wire gauge between the battery and the amp, and the connection quality at both ends. At 450A maximum draw, the electrical system must be engineered for the load. On the road: at 200A of music-level draw, what you actually hear is set as much by the battery, the wire gauge and the quality of the terminations as by the amplifier itself.

Frequency response runs 20–250 Hz – the BFA5000.1 is a dedicated subwoofer amplifier. It is not intended for full-range operation. The LPF and subsonic crossover controls are the appropriate signal management tools for this amp's operating range.

Crossover and Signal Control

The BFA5000.1 runs an LPF crossover covering 20–250 Hz with a 12 dB per octave slope, and a subsonic filter covering 20–50 Hz. The LPF sets the upper frequency limit for the subwoofer channel – typically 80–120 Hz for integration with a 4-channel front stage, depending on the crossover point set in the upstream amp or DSP. The subsonic filter protects the driver from excursion at frequencies below its usable range, where a high-excursion subwoofer can damage itself without visible or audible warning. On the road: the subsonic filter is doing the protecting here, because the excursion that damages a high-excursion driver arrives without a sound or a sign to warn you.

Input sensitivity runs 0.2V – 12V, covering standard RCA output from aftermarket head units and DSP pass-through line-level outputs.

System Integration

The BFA5000.1 accepts low-level RCA input from any aftermarket head unit or DSP processor, or high-level input via Molex® connector. Turn-on supports REM and DC offset modes.

At 200A music-level current draw, the BFA5000.1 is beyond the sustained output of any factory Harley charging system. A purpose-built electrical system with a high-capacity lithium battery, 1/0 AWG power and ground wiring from supply to amplifier, and a 200A fuse on the main power feed are all mandatory. For builds adding the BFA5000.1 alongside a 4-channel amp, the total system current draw must be calculated against the electrical system's rated sustained output before the install is finalised. On the road: this is an amplifier you design the bike's electrical system around before the install starts, not one you add to the wiring already on the bike.

Speaker connections use 12 AWG busbar-style outputs for solid high-current termination to the subwoofer driver.

Fitment

• Designed for custom enclosure positions – Tour-Pak, saddlebag, lower fairing enclosures, or bespoke fabricated sub boxes. Physical dimensions not available at time of publish; confirm chassis size before planning the enclosure position.
• Compatible with all aftermarket head units (high-level or RCA inputs via Molex connector).
• Requires 1/0 AWG power and ground wiring and a purpose-built electrical system. Not compatible with standard factory motorcycle wiring infrastructure.

Technical Specifications