
Indeed, this is the Pro Hits Karaoke disc identity and reviews page
Pro Hits Karaoke Series (PH)

Because of their identity, which is clearly on the physical karaoke discs, they will spark interest from karaoke collectors. The casual user or KJ however, will probably stick with a set from the parent company. This is so they know where they are, and of course, keep their song books in order. Not only that, but they will avoid many dupes too.
To clarify, here is a complete list of the Pro Hits Karaoke Series disc ID numbers from a forum member:
PH02 AKA BS5017 (mpx)
PH03 AKA BS4317 (mpx)
PH04 AKA BS4017 (mpx)
PH05 AKA BS5117 (mpx)
PH06 AKA BS4617 (mpx)
PH07 AKA BS4817 (mpx)
PH09 AKA BS4917 (mpx)
PH10 AKA BS4117 (mpx)
PH11 AKA BS4717 & NT027 (mpx)
PH12 AKA BS4217 & NT009 (mpx)
PH13 AKA BS3817 (mpx)
PH14 AKA BS3917 (mpx)



To Sum Up

Note also that (mpx) stands for Multiplex. In other words, one side of the karaoke track has a with-vocal accompaniment. This is usually the right side but you can turn them off with a suitable machine.
Indeed, just look for the mpx button or similar and the guide vocals will disappear. Just to point out that there is a fair amount of people who like the mpx karaoke discs. Moreover, mpx can help people learn the karaoke songs that they always wanted to try.
Although we could not see any of these discs on the internet, one day they will show up. In fact, karaoke collectors may use the Shack or the karaoke forum to sell theirs. So, never give up should you be seeking this Pro Hits Karaoke collection.
Pro Hits Karaoke Series Song Book Also

In short, click the link below and see the Pro Hits Karaoke song book.