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32 inches wide x 24
inches deep x 13.5 inches The
WO32 subwoofer
brings musical truth to bass in a way that
all discerning audiophiles
can appreciate.
DESCRIPTION Dual Folded Horn using two ten inch sub woofers. This is a high performance solution to the slow, colored, boomy bass found in so many store bought subwoofers. Plans are available for this cabinet. Cabinets are available both finished and unfinished. We recommend our DHM-108 sub woofers for this cabinet.
FEATURES This enclosure, designed by Steve Deckert in the early 1990's, has some unique features. It is actually two folded horns sharing the same mouth. By sharing the same mouth it was possible to reduce the cabinet size by approximately half what it otherwise would have needed to be. Each horn flare has a total length exceeding 5 feet, yet the cabinet size is only 24 x 32 inches! Since the design uses two matching 10 inch subwoofers it can be wired in stereo or mono. It is constructed of dense 3/4 inch MDF with a removable top. The woofers are easily removed with two screws thanks to an interlocking baffle. Available in any stage of completion with or without woofers. The woofers used in this design are our DHM-108 8 ohm 10 inch subwoofers. They are suitable for high power applications up to 250 watts. They also have a good efficiency of 90 + dB with 1 watt so they also respond well to lower power applications. The cabinet can use 1/2 inch or thicker glass in place of the lid. With a good gasket to seal between the glass and the cabinet, it can be used as a coffee table for home theater. It can also be used without the lid by flipping it over on a 1/2 pile carpet with pad. The floor becomes the lid at that point and seals up the box. The Q-Loss through the carpeting creates an action similar to a varo-vent allowing the box to breath. Direct coupling to the floor through carpet raises the efficiency, lowers the cut off frequency, and offers the richest sound. With the lid installed, the sound becomes tighter and the box can then be placed vertical or horizontal for more placement flexibility.
Many audiophiles have used this sub because it has the speed and control of a horn many times it's size but with normal efficiency. It also launches a far more organized wave front of greater size than is possible in a sealed or ported box design. It is popular with electrostat owners and people with small horn loaded and or high efficiency drivers like Lowther and Fostex.
AMPLIFICATION and CROSSOVERS Recommended amplification is between 90 ~ 500 watts. Impedance is 8 ohms per side or 4 ohms in parallel (mono). Active crossover is recommended and should be set between 40 Hz ~ 90Hz. The W032 is a bass design only. It will not work at higher crossover points. Shown above is a
small plate amp installed
into the rear of the cabinet. We do not
offer the box this way
because in order to fit a plate amp in this
location it must be small
limiting its power to 100 watts or less.
Fine with low power tube
gear at very modest listening levels but
that's about it. We
recommend you use a stand alone sub amplifier.
DESIGN NOTES: This cabinet design employees two series of conical tapers that are mirror imaged and combined into a rapid flare resulting in a wide angle discharge. Sharing the mouth of this horn between two conical tapers effectively gives you two horn flares each over 5 feet in length that fit into a box only 24 x 32 inches. While this design is a variation of the original wicked one, it is different in that the driver directly loads the horn flare which has been lengthened. The original wicked one cabinet was larger in size and used two band pass boxes where the horn flares were used in place of ports. An obvious difference between the WO32 flare design and a more conventional horn is that the taper shrinks to a point. Sometimes called a tapered pipe. The woofer is loaded on the sidewall of the taper firing directly into the adjacent surface less than 1 inch away. This technique over-dampens the woofer resulting in a flatter impedance curve, excellent power handling, and better linearity within its operating range. The typical air space between the cone and throat has been reduced dramatically. This creates a direct linear relationship between the air in the horn flare and the woofer driving it.
PURCHASING PLANS The WO32 design employees a lot of angles and must be built exactly to work properly. To this end, we have created an actual size layout template and printed set of plans. These plans are not available without the blueprint.
ONLINE SUPPORT FORUM FOR THIS BOX
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WO32P
