Step up voltage TVC advice

[sumotan]

Hi All,
Would like seek for your expertise & advice pls.
This item : https://www.aliexpress.com/item/1005002924603108.html?spm=a2g0o.cart.0.0.1b5938daueyh1F&mp=1
caught my attention. Reason Im using passive volume out from my dac directly into my Primaluna Dialogue 7, problem
with it is the volume gain on some music collection doesn't go loud enough & I believe the amp has low gain which
was design to go with probably Prima's own preamp. The Tvc that Im speaking off has as stated 5 times step up, so was
wondering if this is a good way to get around my issue. Input impedance stated is 600 ohm max output impedance I
believe is 15k ohms. Input impedance of my amps are 100k ohm so matching shouldn't be an issue

Thanks All

 

[gupsta]

Looking at the photo's, the build quality looks rather poor; for example where the 2 c-cores meet (the air gap) they're not meeting up properly, and there are no bands pressing them together. Honestly looks like junk.