Hi everyone,

I have the good Dali Opticon 2 MK2 and would like to upgrade the crossover.

Dali is known for addressing the ferromagnetic hysteresis problem in its drivers through the use of the Soft Magnetic Compound (and Dynaudio and ATC also address the problem to be honest).

Now, in order to fully benefit from the driver hysteresis reduction, I would like to minimize this problem upstream as well.

At the amplifier level I use nCore, so I'm already quite calm because of the post LPF feedback.

In terms of crossover, however, I have some doubts.

Attached is an image of the Opticon 2 MK2 crossover. I don't know much about it, but the biggest inductor I think is related to the woofer, and I also think it's of the ironcore type (and given the price range I can understand).

The small inductor instead, presumably of the tweeter, seems to me to be air core.

Now I kindly ask someone if they can confirm this.

If confirmed, I'd like to know exactly what to measure of the ironcore inductor in order to identify an alternative air core, which keeps the characteristics of the crossover unchanged.

In this sense, with the same inductance, is it possible to find an air core with the same resistance?

Thanks in advance

I have the good Dali Opticon 2 MK2 and would like to upgrade the crossover.

Dali is known for addressing the ferromagnetic hysteresis problem in its drivers through the use of the Soft Magnetic Compound (and Dynaudio and ATC also address the problem to be honest).

Now, in order to fully benefit from the driver hysteresis reduction, I would like to minimize this problem upstream as well.

At the amplifier level I use nCore, so I'm already quite calm because of the post LPF feedback.

In terms of crossover, however, I have some doubts.

Attached is an image of the Opticon 2 MK2 crossover. I don't know much about it, but the biggest inductor I think is related to the woofer, and I also think it's of the ironcore type (and given the price range I can understand).

The small inductor instead, presumably of the tweeter, seems to me to be air core.

Now I kindly ask someone if they can confirm this.

If confirmed, I'd like to know exactly what to measure of the ironcore inductor in order to identify an alternative air core, which keeps the characteristics of the crossover unchanged.

In this sense, with the same inductance, is it possible to find an air core with the same resistance?

Thanks in advance