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LEHLE GmbH · Germany · www.lehle.com · [email protected]
2. 50K SOCKET
Connect your effects pedal or keyboard
with a jack cable to this socket.
The 50K socket controls your effects ped-
al or keyboard that works with expression
pedals within a range of 25kΩ to 100kΩ.
The 50K socket has 3 different socket-
modes:
Polarity Autodetection, TRS and RTS.
By pressing the soft button (7) the socket-
mode will be changed:
- Polarity Autodetection:
Both LEDs are white, as long as no jack
is plugged in.
Once you connect a jack to the socket,
the LEHLE DUAL EXPRESSION measures
the polarity (RTS, TRS or TS) and adapts
to the polarity automatically.
During the measuring process both white
LEDs are flashing alternately.
After the measuring process only one LED
is on, according to the matching polarity.
The pedal stores the selected mode, as
long as a jack is connected to the socket.
2. TRS
Only the TRS LED is on.
The control voltage is tapped at the tip of
the TRS jack.
3. RTS
Only the RTS LED is on.
The control voltage is tapped at the ring
of the TRS jack.
This mode works for TS with a TS jack,
too.
It’s best to try the Polarity Autodetection
first. Ensure that both LEDs of the 50K
socket are on whilst there is no jack con-
nected. Now connect the TRS or RTS/TS
jack to the 50K socket. After the LEDs
stopped flashing and only one is on, your
effects pedal or keyboard can receive ex-
pression data.
Move the rocker of the LEHLE DUAL
EXPRESSION. If your effects pedal
doesn’t react properly, press the 50K but-
ton (7) to switch from Polarity Autodetec-
tion to TRS or RTS/TS. The alteration of
the polarity causes tip (T) and ring (R) to
be swapped. Thus you are flexible to act
best on every effects pedal.
Refer to the manual of your effects pedal
to find out, if you need a TS-TS cable
(coll. monocable) or TRS-TRS cable (coll.
stereo cable) to make a proper connec-
tion.
50K
Attention: The LEHLE DUAL EXPRESSION
can work with voltages up to 10V.
Higher voltages will be blocked by diodes
to protect the electronics of the pedal.
Please refer to the manual of your effects
pedal to find out how much voltage your
pedal provides.
!
