AudioCircle

Industry Circles => GR Research => Topic started by: DonMcG on 19 Jan 2023, 02:11 pm

Title: Field coil speakers - pros and cons
Post by: DonMcG on 19 Jan 2023, 02:11 pm

Hi,

Danny what are the pros and cons of field coil speakers?

Thanks in advance,

Don

Title: Re: Field coil speakers - pros and cons
Post by: Danny Richie on 20 Jan 2023, 10:35 pm

The advantage is having adjustable electrical parameters on the fly. In practice though they are typically left in a specific setting once optimal for the application is found. So the adjustable feature is not that big of a deal. Other than that they have the same issues and considerations as any other driver. The con is that they cost is much higher.

Title: Re: Field coil speakers - pros and cons
Post by: kd4ylq on 20 Jan 2023, 11:01 pm

On the con side, you need a quiet, stable DC power supply for each coil. So that adds complexity, weight, expense and reduced reliability. They were all the rage a very long time ago (many decades), before high flux, consistent permanent magnets were cheap and readily available. Can't understand why they are coming back really.