Sonic Farm Tantra, User Manual, Page: 9 / 12

42 Line level balanced output (electronically balanced). (XLR pin connection: 1=GND, 2=HOT, 3=COLD). Useful for recording or driving an
external power amp.
IMPORTANT : If you want to drive an unbalanced input, you need to make a special XLR to ¼” cable: Connect
XLR’s pin 1 to ¼” plug ground (sleeve) and connect XLR’s pin 2 to ¼” plug tip. Leave XLR pin 3 disconnected (floating). You cannot use
this cable on the DI output, only on line out.
43 Ground lift switch. Press to prevent hum caused by ground loops (only when the line output is connected to another unit and you get a
hum as a result). This function cannot remove hum already present in the instrument signal (for example your bass pickups picking up
hum). Under normal operation, this switch should be out.
44 DI (or microphone level) output (Transformer balanced). Balanced connection only! (XLR pin connection: 1=GND, 2=HOT, 3=COLD).
45 Overdrive blend disable footswitch. Use a standard latching ¼” foot switch that connects tip and sleeve when engaged.
46 Effects send jack, tip-ring-sleeve. Can be used for unbalanced effects (only when switch 47 is out), or balanced (switch 47 pressed). You
must reduce the signal level when you use unbalanced stomp boxes not to overdrive them. Flip the attenuator switch left, or, if that is
not enough, reduce the (8) and (10) controls.
47 This switch chooses between unbalanced effects connection, like stomp boxes, or balanced (studio units with XLR connectors). Out for
unbalanced, in for balanced. When in balanced mode, jacks (46) and (48) are in TRS mode: Tip: Hot, connect to XLR pin 2; Ring: Cold,
connect to XLR pin 3, and Sleeve: Ground, connect to XLR pin 1.
48 Effect return, balanced or unbalanced, depending on the switch (47) setting. Remember that the FX loop is activated from the front
panel, switch (13).
49 Tuner output, mono ¼” jack.
50 See 39.
51 Preamp fuse, 630mA@115VAC or 300-350ma@220-240VAC. Replace only with a slow blow fuse of the same rating for the appropriate
mains voltage.
52 Ditto, power amp fuse. 10A@115VAC, 6.3A@220-240VAC. Do not exceed these ratings.
53 Preamp power switch. You can use the preamp separately from the power amp (when built in). With the integrated version, always
turn the preamp first (before the power amp), and turn it off last (after the power amp).
54 Power amp power switch. On the front panel, to the right and above the F3 control (25), there is a small red LED. This is the power amp
clipping indicator. If this LED occasionally lights up, it means you are driving the power amp too hard. Reduce the master level.