Do I need to add more components to make this transformer safer?

There are numerous step-down device for reducing AC for consumer electronics.

https://www.amazon.ca/Converter-Transformer-Switching-Household-Electronics/dp/B0FN6RL9LF/ref=asc_df_B0FN6RL9LF?mcid=e4879fff5de13fcea9fff60e8744ace0&tag=googleshopc0c-20&linkCode=df0&hvadid=766556333461&hvpos=&hvnetw=g&hvrand=1849706179935057473&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=1002013&hvtargid=pla-2449076496662&hvocijid=1849706179935057473-B0FN6RL9LF-&hvexpln=0&gad_source=1&th=1

I grabbed the google link, please don't take this as an endorsement.

The AC input has the potential to impact audio if you have really dirty AC. I live in Canada where AC power is fair stable. Our Arctic regions where power is from diesel generators not so much.

Why the TOROIDAL choice for a solution? DIY project?

Yes, DIY only.

Because audiophiles like bigger power.  Toroidal is also regarded as having less hysteresis.  However, other persons prefer E type. They say E type sounds better.  

The only way you will hear any difference is (perhaps) if you drop them both on the floor.

The transformer you have chosen should be fine if it's power rating is sufficient (25VA sounds very low for a high end player).

I would generally select a transformer with at least twice the VA rating of the load.

If the player has a mains earth connection make sure that you connect that as well.

MK

If you're going with the toroidal transformer, be sure to use a bit of insulating mat under it.  Typically, the ground plane is closest at that point and it stresses the insulation more than any other place in the insulating system.  I agree with michaelkellett that 25VA is tiny for a power transformer.

No dilemma at all. IMHO, if you have an audiophile player, it has no audio power amplifier. As long as your power supply can supply the power peaks of the dynamic range, its OK.

That being said, 25 VA at 115 VAC is only about 210 mA.

Transformer spec says 220mA FLA. I dont know what your player power requirements are, but just for giggles pretend the 25 VA is unity PF, i.e. watts. So the transformer rated maybe ok. I have a cheapo blue ray player with HDMI output that uses 10W, 12V at 800 mA. 

Anyway to get to the real point of your question, transformers, motors, etc are often fused unless they are impedance protected, i.e. their impedance is high enough that a short circuit doesnt overload the wiring. 

This transformer has 12% voltage regulation from no load to full load, so without doing calcs, Id swagger short circuit current is enough that Id want to fuse the primary.  600mA to 1A slo blo would do the job. 

I don't imagine the current draw on a disc player would be all that high, so on the surface 25VA doesn't seem that crazy to me... but I'd personally, I'd feel more comfortable knowing the player's current draw.

Hi https://community.element14.com/members/hkphysicist ,

ähm? You have 230V AC and want to use a 115V disc player? Why not just get a 230V disc player?

Okay, okay… I don't know everything.

An analog solution might look good (“audiophile quality”), but your disc player is a digital device that converts digital signals into analog ones.

You can't hear that. A cheap power supply is therefore perfectly adequate for your needs.

What is the type of your Sony disc player? How is its power consumption?
May be this device has a built-in switch for selecting the main voltage.

It is a big sale from a USA dealer on ebay for US$100 a Sony audiophile grade blue disc player!  What can be better?!?  

Then, I can watch 4k blue disc movie, high resolution CD, etc.

You are looking to purchase the unit? That is the need for the step-down transformer.

ok! 

Your selection is ok. But i think it's a bit small.

Look for the next dimension, e.g. number of this transformer, https://at.farnell.com/triad-magnetics/vpt230-220/toroidal-power-transformer/dp/1785733

You can use it up to 440mA secondary if you connect the secondary parallel; 50VA. 50VA is enough for your application.

The primary must connect in serial.

http://www.farnell.com/datasheets/2279608.pdf?_gl=1*1ydhd2r*_gcl_au*Mjg3NDk2NzU0LjE3Nzg0MDY2MTg.

On the primary side you can mount a filter combined with a switch as well as fuses, https://at.farnell.com/xp-power/fgsma10bfr/iec-filter-medizin-200uh-10a-steck/dp/2992528

The housing must be a metal housing which is grounded to earth.

Be careful how you mount the transformer!

Or.... use this https://www.thomannmusic.com/tube_amp_doctor_transformer_230_115v_100va.htm

Best regards
Gerald

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