This subwoofer is similar in design to the snorky sub, but uses an EBS alignment

The working volume is doubled to 100litres and the tuning dropped from 28 to 26hz. The increase in port activity required increasing port diameter to 103mm and fitting flares to both ends. Whilst 13mm routed flares would have been sufficient, this was the perfect opportunity to fit a pair of 20mm heat molded flares

Photo of EBS-Snorky


Extended Bass Shelf (EBS) alignment gives extension down to 24hz (-3dB point)

SPL Graph


Here's the response as measured outside by RoomEQ Wizzard

REW response graph


Two 103mm ports keep velocity below 10 m/sec.


Flare-it was used to select the size of flare required. Using 20mm heat molded flares on the port exits, and 13mm donut rings on the intakes, builds in some headroom at 25hz

Flare-it screenshot


Cone excursion is within Xmax+10%

Excursion graph


EBS-Snorky Subwoofer Gallery


Photo - Donuts

The port intakes are fitted with donuts, effectively providing a 13mm flare. The internals of all joins are hand sanded to ensure there are no sharp edges that could whistle or otherwise contribute to turbulence. Notice the rollover on the inside edges of the shelf brace


Inside view

Photo - Inside view

Ports are supported by shelf brace. The intakes have plenty of breathing room. Closed cell foam will be glued onto the top and bottom panels before the back is glued on. Notice how the slots in the side walls for the shelf brace stop short of the back of the box


Front view

Photo - Front view

Cabinet washed down ready for the new owner to apply the poly finish


Ports - side

Photo - Ports - side

The ports needed to be be bent 90 degrees to fit into the box. The shelf brace provides crucial support


Hot melt glue

Photo - Hot melt glue

This view shows how hot-melt glue can be used to hold the ports within the brace. Quite a gap can be filled


Flush mounted

Photo - Flush mounted

Ports are flush mounted for a clean finish. Slight gap will be filled when the poly finish is applied


Amp recess

Photo - Amp recess

This view shows recess for amplifier. Rollover bit was run around opening for a smooth edge. Also visible is the closed cell foam glued to the floor to help cut down vertical resonances


Front panel

Photo - Front panel

This view shows rebate for driver as well as flush mounting of ports

/EBS-snorky.htm last modified: 27 July 2019
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