Sonic Farm Tantra User Manual Download Page 5

Page: 5 / 12

3-position Lo boost switch. Left: Bass boosted (shelving type) at first tube. Max 9dB (pentode) and 4dB (triode), depending on the

left trim pot setting. Middle: no boost. Right: overall gain boosted, use with very quiet basses or to get more overdrive at the 2

tube.

Tube mode switch. Left: pentode. More gain and subtle saturation. Right: Triode. Less gain and cleaner, more polite sound.

3-position Hi boost switch. Left: Treble boosted (shelving type, starting at about 2kHz) at first tube. Max 9dB (pentode) and 4dB

(triode), depending on the trim pot setting. Middle: no boost. Right: Treble boosted (shelving type, starting at about 4kHz).

Clean gain mix control. This is post the first tube and will affect everything down the chain (not including the OD tube). It is desirable

to have this control as high up as possible without clipping the subsequent stages. You will be watching the bi-color overdrive indicator
LED (9) with the switch (14) in the right position. You don’t want this LED to turn red even at the loudest notes played. Please note
that whereas the tube front end breaks up very musically when overdriven, this not the case with the solid state processors following

the FX loop return. They clip in a very unpleasant and jarring way. (See explanation under 14 to make this even more clear) Also see
compressor explanation.

Bi-color overdrive indicator LED (9). Green for signal presence, turns red to show clipping distortion. It can show a clipping on the first
tube or elsewhere in the chain, depending on the OL feed switch (14), please see explanation.

Overdrive blend pot: mixes the overdriven signal coming out of the 2

tube with the clean one from the 1

. This OD blend can be

muted using a foot switch, see rear panel guide. The small orange LED (11) comes on when foot switch muting is active.

OD mute switch indicator (orange LED). Above it is a blue LED that just indicates that the preamp is ON.

OD+ switch activates the 2

overdrive stage (uses FET’s). Left: 2

OD stage active through a high-pass filter. Middle: 2

OD stage not

active. Right: 2

OD stage full on.

Effects loop activation switch: Left: FX out. Right: FX in. Make sure this one is pushed to the left with no FX connected, otherwise there

will be no sound.

Overload indicator feed switch. Left: Indicates a possible clipping distortion on the first tube. Gain pot (8) will not affect this. Good to

know if you are clipping the first tube with a very loud (high signal output) bass. Switch to Triode to avoid it. Deactivate any boost (5
and 7). This should accommodate even the loudest existing basses. If your signal (maybe a keyboard) still clips the input tube, reduce
the output level on the instrument itself. Right (and this is where the switch should normally be): OL indicator monitors the signal just

prior to the master level control. Bypassed sections affect neither the sound nor this indication. Clipping at those solid state stages
sounds nasty and should be avoided. Use the clean and OD mix controls to adjust.

Pre OD high-pass filter switch. It will affect the overdriven tone. Left: some bass filtered out to avoid mud. Middle: only mids and treble
frequencies pass into the OD tube (use for rock and roll crunch sound or to get more bite out of your bass). Right: full on (think Larry

Graham, “Dance to the Music”)