I thought all Bongo 6's had 4 band EQ, but I found this bass on eBay, and it looks like it has a 3 band EQ (only 4 knobs): ERNIE BALL MUSICMAN BONGO 6 STRING H 6 STRING BASS - eBay (item 130314488882 end time Jul-22-09 15:50:04 PDT)
Is the single H model made with only 3 band EQ?
Is the single H model made with only 3 band EQ?