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"Frankly Peter, I do not know. Certainly I would expect a similar pattern arrangement, but the devil is in the details. You really must become proficient in the tap test method for finding the exact locations for ring placement. This is covered on the listening and teechniques thread and there is no short easy way to aquire the skills both for finding and applying the patterns to the required locations. Do come participate, we will be happy to help you learn what you need to know."
Bud Purvine
"Dear Bud, I have followed many of your posts at after having built back-loaded horn speakers with Audio Nirvana Super 10" cast frame drivers. As a happy owner of a pair of Fostex FE127eN drivers EnABLed by Dave Dlugos, I was hoping to try the EnABLing process on the AN10" myself. Would you be so kind to let me know how much the pattern for AN8 shown in this picture can be used for AN10? Thank you for sharing much of your work (also with Ground Control) with the DIY community. Best regards,Peter"
Peter Gustafik
"Hi Bud, by cahnce found Your web site -great stuff! Have You reworked the Walshs, or are those originals? What´s that exceptional tuning You use for speaker cones and room-looks diffeent from everything I saw so far.. Best regards Matthias Ertel,"
Matthias Ertel
"These spots disperse resonance nodes that arise due to both physical cone, dome or planar ribbon construction and the drastic inefficiency in energy per cubic measure between the cone and adjacent air. Speakers are only about 3% efficient, so lots of odd energy propagation paths are available. If you are interested to pursue this, the teaching is free on Just search for EnABL and don't hesitate to sign up and join in on a very civilized web site."
Bud Purvine
"may i ask , what are those dots on the speakers used for ?"
David Ashby