Sounds proportionally about right based on looking at this: Iconic Speaker Manufacturing - Stonehendge Page
Right, narrower baffles roll off the lower frequencies as they fold back away due to being so large compared to it. This is called baffle step loss, so the narrower the baffle, the higher in frequency this begins. Consequently, narrow baffles typically need baffle step compensation [BSC] unless the speaker isn?t too deep and pushed up against a wall or in a corner.
Large Altec, etc., speakers are wide enough that shelving down the mids/HF to flat or a little lower is usually sufficient since it will be combining with the room?s gain.
FYI, MJK has temporarily made them available again for his yahoo! Group members, so join up if you?re interested: https://groups.yahoo.com/neo/groups/.../messages/3995
GM






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