Blackstar Unity 500 The Blackstar Unity 500 gives you a powerful, 500W amplifier for Bass players. As a result of hours of technical research and benchmarking, the Unity 500 is straightforward and powerful. Boasting deceptively simple controls that allow you to quickly and easily create your tone. With rock solid bass, detailed dynamics as well as innovative features; these Unity Amps are available in a range of options between 30 and 500 watts. What’s more, its unique Response control allows you to choose between the sound and feel of three classic amp stages. So you’re able to shape compression, natural drive, and dynamics. Combine this with three distinct preamp voicings and a 3-band semi-parametric EQ; the Unity 500 will give you a flexible bass tone and the exceptional response of classic valve amps. Above all, the Unity 500 delivers the ultimate tone for any bass guitarist!