Curious about E tickets for a gig?

Hey guys. I have a gig to go to this weekend, and i purchased four tickets off the internet for me and my friends. The ticket is an E ticket which they email you and you print it off. The only problem is that they only sent one email with one picture of a ticket, but on the top of the ticket it says Admittance: 4.
I'm wondering if I just need to print one ticket off for all four of us, because i only received one ticket, and they will all have the same bar code if i printed it off multiple times.