Try not to buy to cheap, unless an active bass an active DI is better for passive bass's, Warm make a fantastic mic level multi instrument active DI, 48v Phantom Power, has a level pot for your DI output, very useful, & has a high quality transformer for a better, cleaner sound, works on many instruments from bass to keyboards, guitar, anything needing a good DI signal, Sushi Box Finally V3 DI has a real 12AX7 tube, variable LPF, real RoHS transformer, very handy well made tube DI for bass guitar, i carry a spare active NU-X MLD Pre-amp/DI pedal & a new 9v battery connector to 2.1mm power input incase of a power break & a spare back-up...great switching options & can be used as a re-amp box with a built in drum machine & 3.5mm headphone input, 3.5mm stereo input for your phone or other 3.5mm music player for practise, it can be used as a bass Pre-amp/DI box or just a good direct DI, very good quality.....