
Heavy Duty Steel Soundproof Box for Appliance Testing. Ultra-Low Noise Floor: Achieves background noise as low as 25-30dB for precise acoustic testing. High Sound Insulation: Delivers 40dB reduction with single door and 45dB with double door design. Customizable Design: Supports custom observation windows, mobile stands, and specific colors. Durable Construction: Features galvanized steel shell with high-elasticity sealing strips and noise-lock. Multi-Layer Structure: Combines soundproofing, sound-absorbing layers, and egg-crate foam. Versatile Applications: Ideal for testing speakers, microphones, motors, appliances, and automotive parts. Flexible Sizing: Available in four standard sizes ranging from 0.8m to 1.5m. Comprehensive Warranty: Includes 1-year warranty and after-sales service coverage.