Finding good pro audio equipment is a bit of a challenge, and it will generally require some research on your part. There is new pro equipment being developed and released almost monthly, and staying on top of current developments can go a long way towards ensuring that your equipment is up to date. Let's take a look at some standard pro audio equipment.A PA system is generally a core component of a good pro audio lineup. PA stands for "public address" and these are systems that allow you to essentially amplify whatever sounds you are trying to convey to a broad audience, e.g. voice, instruments, etc. A good PA system will generally consist of three parts: an amplifier, microphones, and an audio pro speaker or speaker set.
In addition to a PA system, pro audio equipment can include a good mixing board, or mixing console. A mixing board is essentially a means for "mixing" the various amplified elements in the most harmonically pleasing way possible. Mixing boards can be used in a variety of settings, the most common of which include public concerts and recording studios.
A mixing board works by channeling all of the various amplified instruments (including the voice) into one electronic "board" where they can then be manipulated by an audio equipment pro known as a sound technician. The main manipulations include tone, i.e. bass and treble response, and volume. That is literally just the beginning of what a good mixing board can do, however, and you can color a piece of instrumentation with delay, reverb, and a wide variety of additional effects from the mixing board.
Other pro audio equipment includes performance gear and sound production. While pro audio equipment can be expensive, there are outlets that sell quality audio pro used equipment that has been refurbished.