100v,115v versus 230v

"That’s why electronic technicians keep one hand behind their back when working
on circuits with high voltages."

Wouldn't they be safer by disconecting from power?

@jea48= "I doubt any audio equipment designer/manufacturers would agree with you that feeding their equipment 240Vac is better than 120Vac for the sound from their audio equipment."
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Not to be disagreeeable but see this recommendation re voltage...see section 7. When i bought my (crown studio ref one amp) it comes with a (230V/30A) plug....

https://cdn.shopify.com/s/files/1/2572/6926/files/XPA_HC-1_User_Manual_v10.pdf?30550

Glupson.
Of courseit’s safer with power off. But often units must be kept powered so that internal voltages, etc, can be checked. That’s when it’s best to keep one hand out of play.

cakids,

Thanks, makes sense.

ditusa133 posts  

08-16-2020 
 9:02pm  

@jea48= "I doubt any audio equipment designer/manufacturers would agree with you that feeding their equipment 240Vac is better than 120Vac for the sound from their audio equipment."
_____________________
Not to be disagreeeable but see this recommendation re voltage...see section 7. When i bought my (crown studio ref one amp) it comes with a (230V/30A) plug....

https://cdn.shopify.com/s/files/1/2572/6926/files/XPA_HC-1_User_Manual_v10.pdf?30550

It sure does!

7. IEC Power Cord Receptacle.

The XPA HC-1 can be powered by any receptacle that provides between 100 VAC and 250 VAC at 50/60 Hz. This receptacle accepts a standard removable IEC AC power cable (a high-quality commercial power cable is included).

Note: The XPA HC-1 will provide excellent performance and exceptional sound quality with any line voltage between 100 VAC and 250 VAC; however, for the absolute ultimate in performance, a 230 VAC line is recommended.

I noticed it has a Switched Mode Power Supply.
Why the designer/manufacturer recommends 230Vac? Maybe to eliminate the possibility of AC Line voltage drop. It would be interesting to see a schematic wiring diagram of the power supply of the amp.

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