We use an Alesis SR 16 drum machine which helps especially when practicing alone without the band.
There are many pre-programmed settings on it. And the tempo can be quickly set for just about anything you want on any setting you choose.
The main fault I have with it is, it is not pre-programmed for 3/4 time. However it is programmable and it can be set up for 3/4 waltz time, which we did on mine.
They can be bought new for around $150.00.
One other important thing is, they should be used through a bass amp or a P.A. system. They can blow a speaker on a regular guitar amp. Trust me on that one. Been there, done that!
