Max throughput for Ruckus Access Point 7982 802.11n

We have a new wireless network made up of 20+ Ruckus 7982 access points. We have a 50MB circuit from our ISP but max download speed on a single device maxes out around 27-30MB when connected to access point. Is there a configuration setting that will increase the max throughput for a single device while not affecting range or quality of signal?
thanks,
andy