OK, I wasn't expecting much more than something I could hear both the bass and an mp3 file through and I got that. It's nice and compact, USB charging seems to work well. Charge is good for perhaps 5-6 hours of playing time.
Aux volume is set by the device from which you're sending the signal (mp3/cd/pc/phone).
Bass sound is controlled by four items:
- Volume. I can assure you this will be max'ed out ALL the time. Disappointed with the output here. So much so that I bought a cheap, higher output pickup for my bass so I could hear better.
- Tone. Don't mess with this much personally. Seems to work just like the passive tome pot on the guitar.
- Overdrive. Can add some grunge if you like
- FX/WAH. What a joke. It some type of cycling wah thingy. Problem is the frequency of the cycle is not adjustable. SO, it's just a huge distraction.
So, I can hear myself and the music I'm practicing with. For $20, that's about all you get.