Supply Voltage vs Voltage Rating

[Anon Email]

I have a speaker which is rated at 100V, yet the supply voltage is
115V. The speaker works fine. What's the deal?

Cheers,

Anon

 

[Bob]

I have a speaker which is rated at 100V, yet the supply voltage is
115V. The speaker works fine. What's the deal?

Cheers,

Anon

It is good that you put this in the basics group where it belongs

What system is this part of?

Hifi loudspeakers are usually rated by power and impedance.
Loudspeakers for public address systems are usually
"100volt line" types.

A loudspeaker is driven by an amplifier.
Inside the amplifer the AC mains electricity is
converted to DC, typically in the region of 50volts.
The average output voltage of the amplifier varies
with the volume of the sound that the system is
producing.
There is no direct relationship between the
voltage of the mains electricity supply and
the voltage produced by the amplifier.

Bob

 

[Phil Allison]

"Bob"
Anon Email

Hifi loudspeakers are usually rated by power and impedance.
Loudspeakers for public address systems are usually
"100volt line" types.

** The OP has a powered speaker - likely Chinese.

On the back it says 100V cos it is made for Japan or other place with that
power voltage.

Probably got it on eBay.


..... Phil

 

[neon]

he probably have a speaker with 115v ac input to run the amp.

 

[Anon Email]

On the back it says 100V cos it is made for Japan or other place with that

power voltage.
Probably got it on eBay.

....   Phil

No, I bought it in Japan when I was there, and took it home with me. I
bought a transformer which transforms from 240V (I'm in Australia), to
115V. I couldn't find a transformer that transforms down to 100V
specifically. The speaker works fine at 115V. Am I likely to blow the
speaker if I up the volume too much?

Japan is a bit weird, they have voltage supply at 100V, but the
current frequency is 50 or 60 Hz depending on the region. From what
I've read on the Internet, a difference of about 15% in the supply
voltage is OK, and the current frequencies will not affect equipment
that's not sensitive. I also noticed that the desktop computer I used
to use in Japan was rated at 115V - I was curious as to why this
didn't blow the power supply. Am I right about the 15% acceptability
range, or was that incorrect info?

Cheers,

Anon

 

[neon]

These days it is not unusual to have the P.S. with 115-240V AC input same things for 50hz and 60hz. now by putting a tranforfer to stepdown it can cause problem if it is 50 hz as opposed to 60hz you will need a 50hz transformer or a overated 60hz transformer for the same load. 50hz needs more iron as opposed to 60hz. as far as 100v or 115 120v ac nothing will blow up if it is in that range. a P.S. is allways design for at least +/- 20v. military insists on 80v and still function there goes efficiency.

 

[Phil Allison]

"Anon Email"

On the back it says 100V cos it is made for Japan or other place with that
power voltage.
Probably got it on eBay.

No, I bought it in Japan when I was there,


** What a PITA prick you are for not saying that originally.


I bought a transformer which transforms from 240V (I'm in Australia),
to 115V. I couldn't find a transformer that transforms down to 100V
specifically. The speaker works fine at 115V. Am I likely to blow the
speaker if I up the volume too much?


** Go ahead - make MY day ...............


Japan is a bit weird,


** So would you be

- if someone dropped two fucking nukes on you.


they have voltage supply at 100V, but the
current frequency is 50 or 60 Hz depending on the region.


** Depends where the nukes landed - dickhead.


From what
I've read on the Internet, a difference of about 15% in the supply
voltage is OK, and the current frequencies will not affect equipment
that's not sensitive.


** Yawnnnnnn ....

It don't matter - if it don't matter ....


I also noticed that the desktop computer I used
to use in Japan was rated at 115V - I was curious as to why this
didn't blow the power supply.


** Huh ???

Totally off with the pixies....


Am I right about the 15% acceptability
range, or was that incorrect info?


** Is your prick +/- 15% compared to the next guy's ??

Enquiring minds need to know......




...... Phil

 

[Anon Email]

Isn't it funny how the Internet always leads people to talk to each
other in the vernacular known as Verbal Diarrhoea. Thanks for your
help on the first question, Phil, as for the second...VD.