Arc Audio MOTO720 4 channel Amplifier - Previous Demo

Born from the legendary MOTO 600.4 platform, the MOTO720 delivers 20% more power while maintaining the same ultra-compact chassis. Arc Audio designed this amplifier specifically for 2014+ Harley-Davidson Street Glide and 2015+ Road Glide fairing installations, but its versatile footprint makes it equally at home in UTVs, motorcycles, and exotic cars where space is at a premium. The conformal-coated circuit board withstands the punishment of open-air riding, while the microprocessor-controlled protection circuit monitors amplifier health in real-time, shutting down operation at the first sign of trouble to prevent catastrophic failure.

While not technically "waterproof," the MOTO720's dual conformal coating layers provide critical protection for motorcycle and open-air installations. Conformal coating is a specialized polymer material applied to circuit boards that creates a protective barrier against moisture, humidity, road spray, and salt corrosion. The two-layer application ensures comprehensive coverage of sensitive components, preventing short circuits from rain exposure during rides or high-humidity storage conditions. Combined with sealed speaker terminal blocks that eliminate water intrusion at connection points, the MOTO720 delivers reliable performance in environments that would destroy conventional automotive amplifiers.

The MOTO720's innovative Load Select switches (adjacent to each speaker connection) allow installers to optimize power delivery for specific speaker impedances. When driving 4Ω speakers, set the Load Select to 4Ω position for 150W RMS per channel with maximum thermal headroom and amplifier longevity. When driving 2Ω speakers (or parallel-wired dual 4Ω speakers), flip to 2Ω position to unlock 180W RMS per channel. This manual impedance selection prevents the amplifier from attempting to deliver excessive power into mismatched loads, protecting both amplifier and speakers from damage while ensuring clean, distortion-free output at all volume levels.

Beneath the MOTO720's compact chassis lies an advanced microprocessor-controlled protection system that continuously monitors amplifier operation in real-time. The microprocessor tracks critical parameters including heatsink temperature, supply voltage fluctuations, and output load impedance, triggering protective shutdown the instant abnormal conditions arise. This intelligent monitoring prevents catastrophic failures caused by thermal overload (common in compact amplifiers), electrical shorts from speaker wiring issues, and DC voltage events from alternator charging system malfunctions. When the protection circuit activates, the amplifier enters safe mode, waiting for conditions to normalize before resuming operation — ensuring long-term reliability in harsh motorcycle environments.

The MOTO720's 8.125" × 5.43" × 1.8" footprint is specifically engineered for direct-fit installation in 2014+ Harley-Davidson Street Glide and 2015+ Road Glide OEM amplifier locations within the fairing. This plug-and-play compatibility eliminates the custom fabrication typically required for amplifier upgrades, allowing installers to mount the MOTO720 in factory locations without cutting, drilling, or modifying fairing panels. The compact design also fits under-seat locations, saddlebag compartments, and trunk-mounted installations in touring motorcycles where traditional amplifiers cannot physically fit.

The MOTO720's versatile architecture supports 4-channel, 3-channel, and 2-channel operation modes. 4-Channel Mode: Drive front component tweeters + midbass + rear fill speakers (150-180W × 4). 3-Channel Mode: Bridge two channels for subwoofer (360W bridged @ 4Ω) + front components on remaining channels. 2-Channel Mode: Bridge all four channels for dual subwoofer configuration (360W × 2 bridged). The integrated crossovers enable high-pass filtering for front component speakers (protecting tweeters from low-frequency damage) and low-pass filtering for subwoofer channels (ensuring clean bass reproduction without midrange artifacts).

The MOTO720 mounts in OEM amplifier locations on 2014+ Street Glide and 2015+ Road Glide models without modification. Remove factory amplifier (if equipped), mount MOTO720 using factory mounting points, and connect speaker outputs to existing Harley wiring harness. Use high-level inputs to interface with factory head unit, or install aftermarket head unit with low-level RCA outputs for maximum signal quality. Set Load Select switches based on speaker impedance (typically 2Ω for factory Harley speakers when paralleled). Enable high-pass crossover on front component channels (80-100Hz recommended) to protect tweeters, and low-pass crossover on subwoofer channels (80-120Hz) for smooth bass integration.

The Arc Audio MOTO720 is engineered for Harley-Davidson touring riders, UTV enthusiasts, and exotic car owners who demand serious amplifier power in ultra-compact installations where traditional amplifiers cannot physically fit. This amplifier excels in motorcycle fairing installations (2014+ Street Glide, 2015+ Road Glide) where OEM-fit mounting and conformal coating protection ensure reliable performance during open-air riding. Ideal buyers value Arc Audio's USA engineering reputation, require 720W RMS power output for premium component systems, and understand the importance of moisture-resistant construction in powersports applications. The demo unit pricing delivers professional-grade power at exceptional value.