Alistair Testo

At 0:56 in this video, we can see this head behind Ali

At 1:10 on this As It Is' live video, we can see A Orange Tiny Terror 500 Bass Amp behind Ali and Patty

In this video, we can see Alistair playing a Fender Precision Bass, the same that he gots in his profile picture

In this video, we can see Alistair playing a Fender Marcus Miller Jazz Bass

In this live video at Vans Warped Tour, we can see Ali playing trough an Ampeg SVT-CL Head. We can see the Amp in the 2:22

At 2:22 in this video, we can see a Ampeg STV 810 that Ali uses for his bass

At 0:56 in this video we can see this amp behind Ali, and under a Orange Bass Head

In this picture, we can see a Orange OBC810 bass cab next to Ali

In this photo of a As It Is' concert, we can see a Fender Rumble 410 cab behind Ben Biss (As It Is' guitarist). The cab is behind two Orange's bass heads, so this is Ali's amp at that show

In this picture, we can see Ali (Recording the bass from the new As It Is' album) playing a Fender Custom Jazz Bass '64

In this picture from Ali's instagram, we can see this amp

In this picture from Ali's instagram, we can see this amp

He plays a Squier Vintage Modified Jaguar Bass in black colour.