Dongfeng KL truck parts Speaker assembly 3775020-C3302

Built to overcome the noisy truck cab environment, this speaker assembly delivers balanced, high-clarity audio performance. Equipped with a polypropylene (PP) cone and butyl rubber surround, it achieves a frequency response range of 80Hz-20kHz—covering deep bass for navigation prompts and crisp treble for music or phone calls. The 20W RMS power rating (40W peak) is optimized for the KL’s on-board amplifier, avoiding distortion even at maximum volume, while a 1-inch silk dome tweeter enhances high-frequency detail (10kHz+) that cuts through road and engine noise (60-80dB typical in cabs). An integrated magnetic circuit with a ferrite magnet ensures stable sound output, and the speaker’s sensitivity (92dB/W/m) means it produces loud, clear audio with minimal power consumption—protecting the truck’s electrical system

Engineered to endure the harsh conditions of truck cabs—exposed to vibration, temperature fluctuations, and occasional moisture—the 3775020-C3302 speaker features a robust design. The metal basket (stamped steel, 1.2mm thickness) provides structural stability, resisting deformation from cab vibration (10-500Hz) that causes audio distortion. The PP cone is water-resistant and resists warping from temperature changes (-40℃ to 85℃), adapting to frigid winters and sun-exposed door panels. A dust cap (coated fabric) prevents dust and debris from entering the magnetic circuit, while the butyl rubber surround maintains flexibility over time—avoiding cracking that leads to sound leakage. In durability testing, it endures 500 hours of continuous operation at maximum volume without performance degradation

Optimized for installation in Dongfeng KL’s door panels (exposed to rain, humidity, and road salt), the speaker integrates comprehensive protective features. The connector is IP65-rated, with HNBR rubber seals that block water and dust ingress—preventing short circuits from door condensation or rainwater seepage. The metal basket undergoes galvanization and powder coating (60μm thickness), passing 1500-hour neutral salt spray testing (ASTM B117) with no rust—ideal for coastal or snowy regions. The cone’s water-resistant coating repels accidental spills (e.g., cleaning fluid) and resists mold growth in humid cabs. These protections ensure the speaker maintains consistent performance even in harsh weather, avoiding the premature failure common with non-weatherproof aftermarket speakers

This speaker assembly is designed for efficient installation and long-term cost savings for Dongfeng KL operators. Its lightweight design (1.2kg) and pre-assembled wiring harness allow a single technician to complete replacement in 45 minutes—no specialized audio tools needed. The OE-compatible design ensures seamless integration with the truck’s audio system, avoiding the impedance mismatch issues of aftermarket speakers that damage the amplifier (repair costs up to $300). By delivering clear audio, it improves driver focus—critical for understanding navigation prompts and hands-free calls—reducing the risk of route errors (costing $500+ in delayed deliveries). The high-durability components extend service life to ≥300,000km—three times that of non-OE alternatives. Backed by a 1-year/150,000km Dongfeng warranty, it enhances driver comfort and productivity while providing predictable maintenance expenses