User manual

1 [INPUT] | preamp volume control. If the [ CLIP] LED lights up red, this control must be turned counter-clockwise until
the LED turns green again. If some EQ band levels have subsequently been raised, re-adjusting the [INPUT] control
may be necessary.
2 [CLIP] | The LED lights up green when the device is turned on. It lights up red when the signal is clipping. Then turn
the [INPUT] control counter-clockwise until the LED turns green again.
3 [BASS] / [LO MID] / [MIDDLE] / [HI MID] / [TREBLE] | control for boosting or attenuating the bass / lower mids / mids /
upper mids / treble
4 [OUTPUT] | overall volume control
5
| 3.5 mm jack output to connect head phones
6
| 3.5 mm jack input for connecting a line level player, e.g. MP3 player or mobile phone
7
[LINE] | volume control for the input
8 [EQ] | enables or disables the EQ. Slider control is only possible if the EQ is enabled.
9 [HI / LOW] | switch for the sensitivity and impedance of the [IN] input. When using passive instruments, this switch
should be in the [HI] position, otherwise the input level will not be sucient to fully drive the amplier. When using
active instruments, this switch should be in the [LOW] position, otherwise clipping and thus a pre-stage overload can
easily occur, resulting in very disturbing-sounding distortions.
10 [IN] | 1/4" jack socket to connect an electric bass
Connections and operating elements
Block-300B
15
Bass Head