Synthesizers generate sound by controlling various aspects of the waveform with components like oscillators, filters and amplifiers. On Bbop you can find all kinds of synthesizers and filter between analog synthesizers and digital synthesizers. Recently, modular synthesizers have regained popularity. You can learn more about the History of synth on the Bbop blog.
Some of the leading brands of synths include Yamaha, Novation, Korg, and Roland, while other smaller companies like Modal Electronics are producing boutique synths.
If you are looking for a polyphonic synthesizer, try searching in the Bbop marketplace, where we have new and second-hand synthesizers for sale at various price ranges. You might find the best budget synth for you.