EnABL How-To for Fostex FE127e and other speakers

[globalplayer]

"You and I and every other thing are a dependent arising, empty of any inherent reality" Tsong Ko Pa

Great signature.

 

[planet10]

It should be noted that i never bothered with a ring on the backside — only the ZIG 2-way glue at the cone surround interface.

dave

 

[BudP]

Good thing too. That ring will make the cone much more transparent to reflected sound, even from your cool Fonken boxes. Really is only for open baffle use. Even back loaded horns will suffer.

 

[LinuxGeek]

The attached are the last 127 ring set I published, 2012. Print from Adobe reader with full page control. Usual setting is for less than 100%. Cut out and drop onto cone as Dave shows. The mid cone rings will go a long way towards eliminating the 7k peak.

Good thing too. That ring will make the cone much more transparent to reflected sound, even from your cool Fonken boxes. Really is only for open baffle use. Even back loaded horns will suffer.

Seems rather hard to do, i will try, but i think the backside could be beyond my capabilities. Tomorrow i will see more.

 

[planet10]

Here is a more versatile set of generic templates: http://www.planet10-hifi.com/downloads/Generic-EnABL-patterns-211217.pdf

dave

 

[BudP]

Those are really cool Dave.

 

[jimbro]

Your basic Enabl question - what happens if you combine a non-enabled driver with an enabled one in a mtm for example? Does the non-enabled driver smear the fine detail revealed by the enabled one?

 

[freddi]

has the treatment been tried on headphone drivers ?

 

[BudP]

Jimbro, Depends upon where the resonance peaks are in the un enabled driver. Usually a loss of imaginary depth and some sharper highlights from adding a tweeter to EnABL’d mids. Adding a pair of untreated woofers to a treated tweeter would mask the tweeter as the mids would have poor 1/3 octave to 1/3 octave phase and the tweeter would not do what it is meant to. Add the leading edge for all frequencies in the proper time alignment.

Freddi. Yes. Spectacular results to subtle depending on the driver used. Typical blown bubble from Japan has greater depth of coherence and better tone as all of the constituents that make up a tone are time aligned and so are in phase. Grado HP are a good example.

Bud

 

[jimbro]

Happy Holidays! Thanks for the reply Bud, that's interesting. Hate to keep asking so many questions but maybe we'll all learn something. Obviously you can't enabl a ribbon tweeter so would that mean ribbons are not a good idea to use with enabled mids?

 

[BudP]

Actually ribbons are the easiest to treat. They only need a line of pattern blocks across the short dimension, at either end of the ribbon, no matter the material used or type of field used. Usually the support plate needs a line of patterns down the long sides, not always out at the outer or inner edge of the plate, but never on the ribbon diphragm.

 

[phivates]

OK I'll ask: EnABL patterns on compression driver diaphragms? Anyone?

Cal?

 

[BudP]

Yup and on the compression slotted dome too. Need to learn the tap test method to find out where though. T350 from EV, with the phenolic dome, is one of the drivers that patterns made zero difference for though. Horn surfaces also. LeCleach flare needs on ly one, more conventional horns can get pretty busy. The result is considerably more impact, literally physical impact, from a treated horn. Removes breakup resonances too. Learn the tap test method, the diaphragm, compression form and horn will teach you where to place the patterns.