Will let them say hello to a KGSSHV, and rip them apart when they arrive.
Always willing to take one for the team. Thanks!
Are you gonna use the HV's 580V bias or modify it to accommodate the lower King Sound bias voltage?
And I don't know why they did not use the current standard pro-bias 580v. The only amp's I have on hand atm excluding the SRM 1 MK2 that is on it's way here are all pro-bias.
Let me know how that higher voltage is doing ya...
+1, going to anticipate on Birgir's findings once he rips the King's apart.
Bias is a fixed voltage level on the diaphragm. Music signal does not drive the diaphragm, it drives the stators (outer plates). So bias level is independent of volume level setting. You can arc the diaphragm with excess voltage without ever having played music or any signal through the headphones.
Their bias level likely has nothing to do with Stax, or amp capability. Having proper materials and manufacturing controls for higher voltage levels is harder. Chances are they are limited to the bias they have due to practical limitations and have set it based on tests. likely going higher in bias gave them problems. But there are many inter-related design issues. Closer stator spacing would increase output but could require lower bias to prevent arcing. So it would be hard to look at one item, bias, out of many parameters (stator spacing, diaphragm material, diaphragm coating resistance, thickness of diaphragm material, diaphragm tension, bias level, stator signal voltage) and conclude anything at all.
Well things aren't that simple as the bias voltage is inherently linked to the size of the diaphragm/stator air gap so use a higher bias for the given gap you will have noise issues and the risk of damage becomes greater. The only way to say what is a safe operating range is to take the drivers apart and measure them.