What is the best beginner guitar amp?

I would recommend a line6 or Vox modelling amp without hesitation for a beginner.

These devices will let you try may different approximations of classic amps as you develop as a player. Having these options will help you decide which type of amp you really need to suit your playing style, which is bound to change in your first year or two of playing.

Your ear for tube tone develops over time. When you feel comfortable calling yourself an ‘Intermediate’ player, Then it will be time to worry about Tube response and customizing your rig.

Hi, it is a matter of taste greatly. I believe you should make a search, read some reviews if you need some really good option. You see, I have Line 6 Spider IV 15. it sounds pretty good with my Yamaha PAC112J just as if it was made for it. Still, I purchased it thanx to this resource https://guitar-amp.com/stratocaster/ providing the full information about amps. Simply give it a try