What's the difference between an arranger keyboard and a regular keyboard?

While regular keyboards put the focus mainly on sounds, an arranger keyboard is designed to be a backing track machine that follows the chord changes played by your hands. This allows you to perform fully orchestrated songs without limitation, extend sections, move into different keys on the fly and add effects to suit the moment.

Do I need an amp for an arranger keyboard?

Many arranger keyboards feature built-in speakers which makes them great for practising at home. However these won't be loud enough for gigs, so it could be worth investing in an amp or PA system if you're going to be playing to an audience.

How many keys does an arranger keyboard have?

Most arranger keyboards feature 61 keys, which makes them portable but still suitable for two-handed playing. However, there are some 76 and 88 key models available.