Question powered speakers with stepdown converter

[cafebudapest]

Hi,
I have a pair of 110v genelec powered speakers.
the full power consumption for each speaker is written 60w
I need to use the speakers in europe with a 220 v power supply.
I have two stepdown converters, so from 220v to 110v each of which is to use with devices up to 85w
I see online all kind of converters that go up to 2300 w and yet are very small. I also remember reading somewhere, that one should multiply by three the power required for each speaker to get the power I would need for a converter, so that would mean I'd need a 180w converter. Is that true? Can I use safetly my converters? what's the deal? what kind of converter do I need? i just want to make sure I don't blow up the speakers of course.
thx for your advice

 

[davidgirgis]

What is the model of your Genelec speakers?

I ask because a lot of these speakers don't need a transformer at all and are able to operate from 100V to 240V

 

[cafebudapest]

thx, yes not these ones unfortunately. they're the 8020A model

 

[davidgirgis]

The manual I'm reading says 230V. What does it say on the back of your speakers?

 

[cafebudapest]

my speakers 110v only

 

[davidgirgis]

OK, it looks like you have a bass amplifier and a treble amplifier, each consuming 20W. So, at least a 40 W transformer is recommended.

 

[cafebudapest]

cool, so an 85w should be fine?

 

[davidgirgis]

Full output is rated at 50 VA (Volt-Ampere)
This kind of rating combines real (Watt) and reactive (Volt-Ampere-Reactive) power consumption.

I would add another 20% on top of that 50 VA for safety reasons.
So, a 60 VA transformer is recommended.

 

[davidgirgis]

The shape of the plug might also differ, for that you need an adapter. Your transformer might have an adapter built-in.

 

[cafebudapest]

ok, so is that equivalent to 70watts?

 

[davidgirgis]

Not exactly, Full output is rated at 50VA.
The electro-magnetic motor moving the speaker's 2 drivers consumes a combination of real power (W or Watts) and reactive power (VAR or Volt-Ampere-Reactive). Combined, these two add up to 50 VA (Volt-Amperes).

Source: https://www.genelec.com/sites/default/files/media/Previous models/2-way loudspeakers/8020A/om8020a.pdf (Amplifier Section)

 

[davidgirgis]

Do you have two of these step-down converters? Are they identical?
What does it say on the converters themselves? What does it say on the back of the speakers?

Include all ratings for a better understanding.