The HR-824 (Mackie's most popular unit) has a rectangular passive radiator
on the back, under the amplifier unit.
I think some designers assume that low frequencies are omnidirectional, so
it doesn't matter whether the ports or passive radiator are in front or
back. In a compact monitor, there is no room in front for it, so it makes
sense to put it in back. One nice thing about having the ports in front
though is that the speaker can be soffit mounted.
On Thu, Feb 7, 2013 at 10:16 AM, Tom Fine <[log in to unmask]>wrote:
> Someone said Mackie uses passive radiators on its "studio monitors"
> nowadays. Where is the passive radiator?