The 3M Peltor X4A is a passive over-the-head earmuff with NRR 27 dB. Weighing approximately 0.44 lbs, it is designed for loud industrial and construction environments where higher attenuation is required. Suitable for equipment such as chainsaws, jackhammers, and heavy machinery. No electronic components or audio features. The deeper cup design provides the additional sound attenuation, with padded cushions for extended wear comfort.
Is NRR 27 dB enough for a chainsaw or jackhammer?
Chainsaws typically produce 100–115 dB and jackhammers around 100–110 dB. Using the standard NRR halving method, an NRR 27 earmuff reduces estimated exposure by about 13.5 dB. For chainsaws at the high end, pairing with foam earplugs underneath provides additional dual protection. For most jackhammer durations, the X4A alone is adequate under OSHA limits.
Does the higher NRR mean more clamping pressure?
Higher NRR earmuffs generally require a better seal, which often means firmer clamping force and deeper cups. The X4A has slightly more clamp pressure than the X1A or X2A. Most users adapt quickly, but if clamp pressure is a concern for all-day wear, try the X4A before committing to a full shift.
How does the X4A compare to the X2A?
The X4A delivers NRR 27 dB versus the X2A's NRR 24 dB, a 3 dB improvement that meaningfully reduces exposure in loud environments. The X4A weighs 0.44 lbs vs 0.41 lbs. Choose the X4A for heavy equipment, the X2A for moderate power tool use.
Will the X4A fit under a hard hat?
Yes, the X4A is compatible with standard hard hats. Some low-profile safety helmets may be snug with the deeper cups. Standard Class E hard hats typically accommodate the X4A without issue.
Does the X4A have Bluetooth or radio features?
No. The X4A is a passive earmuff with no electronic components, no batteries, no Bluetooth, and no radio.
# 3M™ PELTOR™ X4A Over-the-Head Earmuff **Model:** `X4A` **Brand:** 3M **Category:** Hearing Protection > The 3M Peltor X4A is a passive over-the-head earmuff with NRR 27 dB. Weighing approximately 0.44 lbs, it is designed for loud industrial and construction environments where higher attenuation is required. Suitable for equipment such as chainsaws, jackhammers, and heavy machinery. No electronic components or audio features. The deeper cup design provides the additional sound attenuation, with padded cushions for extended wear comfort. ## Specifications | Attribute | Value | |---|---| | Product Type | Passive Earmuff | | Style | Over-the-Head | | Nrr Db | 27 | | Bluetooth | No | | Am Fm Radio | No | | Weight (lbs) | 0.44 | | Barcode (UPC) | | Source: https://www.jaspecs.com/3m/hearing-protection/x4a-3m-peltor-x4a-over-the-head-earmuff/