How the internal trim pots work... 1) Jack output: switches battery on as jack is inserted. 2) 600 ohms balanced line output. 3) Trim pot: adjustment for cutting low bass frequencies for each pickup. Mainly relevant to 5-string basses with low ‘B’ strings. These pots were introduced with the 5-strings. They roll off some of the bass from the pickups. This was originally to allow mid-80s bass amps cope with the low B string without overloading the amp. Nowadays it is unlikely that the bass roll-off will be necessary. However, if you need them they are there... 4) Trim pot: level adjustment for pick attack, set halfway for normal level. The pick attack function (pull up the vol knob) adds an additional presence into the bass sound somewhat simulating the click of a plectrum when playing finger style or allowing the bass to cut through in the mix. Normal factory setting is 50%. Increasing the pick attack level increases the effect. However, at high settings that can emphasise finger noise and/or over cook the mid response a little. 5) Master volume control: normally set a maximum. Should less output be required reduce as appropriate, e.g. when using some makes of radio transmitter, balancing output against another, lower or when encountering amplifier overload problems. Note: trim pot function direction changed in the late 80’s from fully clockwise adjustment being maximum to fully anticlockwise for maximum (late 80’s to current day). To double check, adjust master volume trim pot fully to determine direction of all trim pots.
Posted on: Tue, 06 Jan 2015 21:24:34 +0000