Wayne Parham Messages: 18791 Registered: January 2001
Illuminati (33rd Degree)
Eminence has changed the Alpha 10 and some of its other drivers recently. They've changed the voice coil to make them handle more power and while they've kept electro-mechanical specs pretty similar, there have been some minor changes. In the case of the Alpha 10, power handling and ultimately maximum output has been increased but there is a rise in the upper midrange as a result.
The way we're addressing this is to include a 0.5mH coil as a pseudo-first-order filter to create a shelf of reduced energy between 1kHz and 4kHz. The response curve you can expect from a 0.5mH coil in series with an Alpha 10 is shown below.
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Pseudo-first-order 0.5mH in series with Alpha 10
