| ER 20 earplug query
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When I play loud gigs I usually wear custom moulded ER25s, but unfortunately one of them has been sent off to be fixed.
I'm due to play a very loud gig soon so while wearing the remaining er25 in one ear, would I be better using an Er20 or a foam earplug in the other?
I'm not worried about clarity, just which will provide the most protection.
thanks, | 
