MarkBass Little Mark Tube 800 Bass Head AS ISNotes This listing is being sold as is not clear what the issue is, but it does not produce sound currently A MarkBass Little Mark Tube 800 Bass Head AS IS in Non Functioning condition! At Evolution Music, we attempt to highlight cosmetic defects (if any) by picturing every angle of every piece of gear so you know exactly what you are getting. We always picture any and all accessories too. What you see is what you will get so please check out the