Hello all Cool forum members
How often have you dreamed of the ultimate wall of sound with your most prized drivers only to have it held in the back of your mind for fear of the WAF?
In my former reincarnation l was happily married and my wife actually accepted the concept of something along the lines of an OMA Monarch in the house. Known in some hi end design circles as the butterfly loudspeaker.
https://oswaldsmillaudio.com/monarch
Referring to the link you can see the concept. The brilliance in this industrial design is to disguise an otherwise ugly box that sounds good into something that will be a welcome talking point in the home.
The wings are more than cosmetic. In combination with the scaled up compression driver throat the
the wings form a conical horn which loads the woofer down to about 70 hertz. Placed in a corner the loading extends and the 1/4 Pi loading helps create high efficiency down the lower octaves. The gain on the horn can be manipulated but it’s about 6-8 db so the efficiency is up around 99 db 1 watt. In simple terms rather than have a bass reflex enclosure boom with the typical bass hump by lifting the overall system efficiency the response is equalised.
I have simulated the JBL 2216nd in Hornresponse modelling and it works quite nicely. The key is to set up the throat chamber with the horn to provide the required bandwidth and efficiency. The 140 litre enclosure is bass reflex and ports out via the throat into the horn.
The wings are angled precisely to provide the correct loading and can be cut from veneered plywood.
The HF horn can be anything really but l am looking at the M2 horn or an AH700 conical horn. I have both and a choice of the JBL D2, a 2447 or a Tad 4003.
https://oswaldsmillaudio.com/monarch
My next step is to mock up the concept and perform some measurements.
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