AudioStatic ES-100 power

[silvershadelynx]

Hi,


I just bought a second hand AudioStatic ES-100 print. It has 2 wires for power supply connection, but I'm not sure what voltage to connect. Can I connect it straight to the mains (220V, Europe), or is it a lower voltage like 12 V? When watching photos, I see just a wire from the rear of the ES-100, but I've read about 120 / 12 V power supplies for the ES-100 on this forum. I wasn't able to find a schematic of the ES-100, only for the ES-100, where a 9V voltage input is printed.


Kind regards, Jeroen

 

[Mike Beck]

If it is like the ES-50, it requires 9vac. Supplying dc will damage the internal hv bias transformer.

 

[bolserst]

I just bought a second hand AudioStatic ES-100 print. It has 2 wires for power supply connection, but I'm not sure what voltage to connect. Can I connect it straight to the mains (220V, Europe), or is it a lower voltage like 12 V? When watching photos, I see just a wire from the rear of the ES-100, but I've read about 120 / 12 V power supplies for the ES-100 on this forum.

The ES-100s sold in the US that I have worked on all used an external 12vac wall plugpower supply. This was stepped up internally with a small transformer glued to the frame near the PCboard, before passing the voltage to the HV multiplier.

At least some of the ES-100 sold in Europe use a direct connection to the 230vac mains power.

I am not sure if the different methods is because of safety regulations, or simply because US uses 115Vac mains, and this would not work with direct connection to HV multiplier. There was a recent thread where another diyAudio member decided he wanted to add an isolation transformer between mains connection and the HV multiplier.
Audiostatic esh50 renovation project

 

[MJ Dijkstra]

All audiostatics I have seen in Holland, run on 230 V ac. Bevause of more rigid requirements in the US they fed the speaker not directly from 230 V which explains the little yransformer glued on the back; it was not designed that way in the first place.

 

[silvershadelynx]

Hi Bolsert and MJ,


thanks for your replies, that makes sense. I guess I have a Dutch version which runs @230vac mains power.