According to the JBL sheet for the 2397:
http://www.lansingheritage.org/html/...-comp/2397.htm
It mentions "Vertical dispersion is largely dependent on the baffling; with the recommended cylindrical baffle extending at least 3 inches above and below the mouth, a nominal 60 degree vertical beamwidth is achieved."
Is the Westlake profile equivalent to the "recommended cylindrical baffle"?