Measure the existing audax. 4kHz isn't a bad xover point; I would choose the cheapest (i.e. Chinese) true ribbon that has the right nominal sensitivity (i.e. ~equivalent to the audax -- or higher).
Can you find out the hi pass particulars and if there's any "taming" (notches, paddings and the like) taking place?
Fo a much used and tried model, there's the Raven (1 or 2, both expensive).
The problem you may have is the ribbon not matching sonically (the perception of "speed" is often the problem) with the next drive unit. Phase anomalies can raise their ugly head... that's why I recommend cheap first.
Also beware of high wattage; ~30 is a safe max & you're best starting out with a 24db LR cut.
The PMC looks very well thought out as is, you see. What are the other drivers, BTW? Volts?
Can you find out the hi pass particulars and if there's any "taming" (notches, paddings and the like) taking place?
Fo a much used and tried model, there's the Raven (1 or 2, both expensive).
The problem you may have is the ribbon not matching sonically (the perception of "speed" is often the problem) with the next drive unit. Phase anomalies can raise their ugly head... that's why I recommend cheap first.
Also beware of high wattage; ~30 is a safe max & you're best starting out with a 24db LR cut.
The PMC looks very well thought out as is, you see. What are the other drivers, BTW? Volts?
