Egglestone Andra 1 tweeter "crossover"


A friend of mine told me that my Andras 1 will sound better if I use a good quality, non-inductive resistance, of 1 ohms in serie of each tweeter. If I do that, he says that the sound will be similar of the Stax Omegas 007 earphone. I will be pleased if someblody can help me in that. Regards, Francisco.
vectorsa

Showing 1 response by jotam

Dear Andra owner:

Inserting a small-value resistor in series with the tweeter, after the x-over, will certainly lower the tweeter output without varying the factory's x-over point.

The inmediate result would be a "smoothening" of sound in the treble region plus and improvement in music balance. Hi frequency extension would be unaffected.

Only by trial and error you can reach the "best" resistor value, since your musical preferences plus your auditioning enviroment are unique. A resistor in the 0.5 to 2 ohms range would yield the best match. Better to use non-inductive (inductance "eats" hi-frequiencies) 5% or even 1% tolerance resistors with 10 watts or higher capacity.

If temporary cables are run from tweeter terminals trought speaker port to the outside, resistors can easily be interchanged outbound until sound is satisfactory. After the "right" (for your ears) resistor value is found, then permanent connections can be made inside, close to the driver.

Speaker's manufacturers currently include resistors or potentiometers or both in their x-over design to attenuate tweeter output in order to match level with it's mating woofer's. "Monkey business" starts at factory.

The exquisite sound of Stax headphones (and many other first rate transducers) features, among other things a combination of both superb hi-range extension plus a domesticated treble. This taming of treble rarely occurs naturally, tweeters should be almost always attenuated.

Audio is fun. Discovering things that make music more enjoyable is wonderful. An inexpensive mod making my music sound better, that's divine.

Enjoy!