JBL S300 S400 Replacement Headband — Gray Leather

About this pair

A cracked or peeling crown strap can make otherwise solid Synchros cans uncomfortable long before the drivers fail. This JBL S300 S400 replacement headband restores a gray leather-look top strap for Synchros S300, S400, and S400BT owners who need an aftermarket headband for JBL S300 S400 without buying a whole second headset. It is a headband, not a pair of ear pads—gray ear pads for the same models are a separate SKU—so you get the crown-pressure comfort pad refresh the listing name promises.

Gray leather headband for JBL S300 S400 is aimed at everyday headband for JBL S300 S400 use: workouts, commute, and desk sessions where a wipe-clean gray strap surface beats flaking OEM padding. Shoppers who search buy JBL Synchros S300 S400 gray leather headband or S400BT gray replacement headband for sale want a Synchros gray leather headband that slides or wraps the way the worn cover sat. Confirm the slider and strap width on your worn headband before assuming other JBL lines will share this spare.

Headband compatible with S300, S400, S400BT keeps one spare useful across the shared Synchros family. How to replace headband on JBL S300 S400 is typically a DIY slide-on headband sleeve check: seat the new gray leather-look strap over the existing metal or plastic band the same way the old cover sat, then verify the leather-look headband slider still moves freely. Avoid soaking the padding when you clean—wipe the smooth surface with a slightly damp cloth after sweaty gym sessions or humid commute days.

If you have been comparing JBL S300 S400 headband price listings, cheap gray JBL S300 S400 headband spare options often omit the S400BT callout. This aftermarket S300 S400 strap names the three Synchros models so you can order aftermarket S400BT gray headband cover pieces with clearer fit intent. It is not ear-pad SKU 173988; that listing is for gray ear pads on the same family. Keep the distinction clear when you shop Synchros gray leather headband in stock and need the crown strap rather than cushions.

Cracked gray headband padding shows up as shiny flakes along the crown and uneven pressure on longer listens. An aftermarket Synchros spare lets you restore the top contact without hunting discontinued OEM channels. Where to buy Synchros S400 gray leather-look strap matters when local shops only stock ear cushions—Buds Need Parts stocks this gray leather-look headband so Synchros owners can refresh the strap that actually sits on the head and carries daily crown pressure.

Whether you need a DIY Synchros headband swap before a week of commuting or a shared S300 S400 S400BT strap for a household with mixed Synchros models, this gray leather replacement headband keeps the focus on the crown strap. Confirm fit on your worn band, wipe the leather-look face after sweaty sessions, and keep your Synchros headset comfortable for everyday listening on the train, at the desk, and during workouts. A named aftermarket spare is simpler than guessing sleeve width from a generic “fits many JBL” listing.