Allen 4151 Ultrax Bionic Electronic Hearing Protection 22dB FDE

The Allen 4151 Ultrax Bionic Electronic Hearing Protection delivers professional-grade noise reduction with enhanced ambient sound awareness for shooters who demand both safety and situational awareness. This flat dark earth model combines 22dB noise reduction rating with advanced sound amplification technology.

What Makes This Different

Unlike passive hearing protection that blocks all sound, the Ultrax Bionic features dual microphones that amplify low-level sounds up to 4x while instantly shutting off when noise exceeds 82dB. The electronic circuitry responds in 0.5 milliseconds, faster than traditional foam plugs or basic electronic muffs. This allows shooters to maintain normal conversation and hear range commands while providing superior protection against harmful impulse noise.

Key Features

• 22dB Noise Reduction Rating (NRR) with instant sound cutoff at 82dB
• Dual directional microphones with 4x sound amplification
• 0.5 millisecond attack time for rapid noise suppression
• Adjustable headband with padded ear cups for extended wear comfort
• 3.5mm auxiliary input jack for radio or music connectivity
• Flat Dark Earth finish matches tactical gear and camouflage patterns
• Operates on 2 AAA batteries with automatic 4-hour shutoff

The electronic amplification proves valuable during training sessions where instruction needs to be heard clearly, while the instant compression protects against muzzle blast and other sudden loud noises. Range officers appreciate the ability to communicate effectively without removing protection. The low-profile design works under most shooting caps and doesn't interfere with rifle stock positioning.

Technical Specs

• Noise Reduction Rating: 22dB
• Sound amplification: Up to 4x normal hearing
• Attack time: 0.5 milliseconds
• Power source: 2 AAA batteries (not included)
• Battery life: Approximately 350 hours
• Auto shutoff: 4 hours of inactivity
• Auxiliary input: 3.5mm stereo jack
• Weight: 13.2 ounces
• Color: Flat Dark Earth (FDE)
• Manufacturer: Allen Company

The Allen 4151 Ultrax Bionic represents a significant upgrade from basic foam plugs or passive muffs for serious shooters. The combination of hearing protection and sound enhancement addresses the dual needs of safety and communication that define modern shooting sports and tactical applications.