Hi Phumsorn,
Here are the details I found in the file for your bass:
91U6961 Europa bass ULB4
top: Burl Walnut
accent: Maple and Vermilion pinstripes
body: Mahogany
neck: Maple and Purpleheart, 34 scale
fingerboard: Ebony with pearloid ovals
pickups: MXY56, neck pickup moved 3/4 toward bridge
controls: Europa
output: 1/4 mono, side-mounted
originally made for: KCM, Thailand
birthday: January 2, 1991
There are no previous registered owners.
You asked about the controls: the Europa controls are volume, pan, filter, 2-position Q switch, bass boost/cut switch, treble boost/cut switch.
The quick tone switches are bass and treble and are not individual switches for the pickups. Each switch provides 6db boost, flat, and 6db cut.
The low-pass filter is adjustable from 350Hz-6KHz. The Q switch is flat when in the up position while playing. Pushing it down adds an 8dB boost to the frequency that the filter is tuned to.
