Centre Balance
<div class="rg36"><div class="hd"><span>L</span><output>+18</output><span>R</span></div><input type="range" min="-50" max="50" value="18" aria-label="Pan"></div><div class="rg36"><div class="hd"><span>L</span><output>+18</output><span>R</span></div><input type="range" min="-50" max="50" value="18" aria-label="Pan"></div>