Order code: 1024
Voltage Internally Doubled to 18V
To exploit the dynamics of tube amplifiers to the full, the input voltage of Lehle products bearing this symbol is rectified from the power supply socket, then filtered, stabilized and doubled to 18V.
Adjustable Gain
Adjustment of volume or distortion using a gain controller is a vital feature in many situations. The gain controllers on the corresponding Lehle products feature black anodized aluminium knobs set back into the housing so that they can be easily fingertip rotated but keep their settings during performances and transportation.
Magnetic Sensor
Potentiometers, which are usually installed in volume pedals, are always exposed to extreme wear and tear, so they deteriorate quickly. In order to keep the mechanical stress and thus the wear of the pedal as low as possible, a magnetic sensor, which uses the "Hall effect“, is installed in the LEHLE VOLUME and EXPRESSION pedals instead of a potentiometer. In accelerators of modern cars this has long been standard: a magnet is moved, and a stationary Hall sensor measures very precisely the distance. The magnetic sensor is therefore not exposed to mechanical wear, making these solutions work very reliably.
Voltage controlled amplifier
VCAs are voltage controlled amplifiers. These are small electronic amplifiers for audio signals, that use a voltage to control the gain of the amplifier. In our volume pedals we are using these units instead of potentiometers to control the volume. This has several advantages: a much longer life span and stable input and output impedances over the entire control range. We are only using premium Blackmer® VCAs of the THAT corporation.

The LEHLE MONO VOLUME 90 is a volume pedal equipped with a precise magnetic sensor enabling it to operate almost wear-free. This sensor uses the Hall effect, named after Edwin Hall, to measure the strength of magnetic fields. In the LEHLE MONO VOLUME 90, the Hall sensor, which is made in Germany, is accurately calibrated to the built-in magnet and the control range of the pedal. The pedal moves only the magnet, the distance is measured by the Hall sensor which controls a VCA.
A premium Blackmer® VCA (= Voltage Controlled Amplifier) from the United States replaces the mechanical potentiometer. The principle of the voltage-controlled amplifier is based on the fact that gain can be varied by the control voltage coming from the Hall sensor. This technique allows to operate more precisely than conventional mechanical potentiometers or optical sensors used by the standard volume pedals. In addition the potentiometer-typical noise and the complicated adjustment are eliminated.
Over the entire control range the LEHLE MONO VOLUME 90 transmits the full sound spectrum of the connected instrument. The input and output impedance always stay the same, ensuring that there will be no damping of higher frequencies as with potentiometers.
Internally, the input voltage coming from the power supply socket of the pedal is rectified, then filtered, stabilized and doubled to 18V, thus achieving a total dynamic range of 110 dB.
The volume control of the LEHLE MONO VOLUME 90 ranges from -92 dB to 0 dB - so from a virtually muted level to the same volume. Using the MIN control, the minimum volume of the LEHLE MONO VOLUME 90 can be set within a range from mute 0% to 90% (-10 dB). Furthermore, a gain up to +12 dB boost can be additionally adjusted via the GAIN control.
The LEHLE MONO VOLUME 90 runs mechanically extremely smooth and steady, as it is equipped with low-friction bearings of a high-performance polymer, and there is no mechanical transmission of the pedal to other components. By means of an adjusting screw the mobility of the pedal can be modified very precisely.
In addition, the LEHLE MONO VOLUME 90 has a buffered direct out which can supply a tuner, DAW or a second amp without affecting the sound.
In- and output jacks on the side of the pedal make the LEHLE MONO VOLUME 90 an ideal device for pedal steel players – without any obstruction, the pedal can be placed in the usual spot on the pedal steel rack.

Q: What is the difference between the LEHLE MONO VOLUME and the LEHLE MONO VOLUME 90?
A: The LEHLE MONO VOLUME has the connections at the front, while the LEHLE MONO VOLUME 90 has the connections at the side and an additional control for the minimum volume.
Q: What is the effect of an impedance converter?
A: The sound will be freshened up and signal loss through long cable runs will be compensated.
Q: How can I compensate the signal loss on my effects board?
A: By using an impedance converter, which provides a high impedance input socket for the instrument signal and a low impedance output signal that is more resistent against loss.
Q: Can the LEHLE MONO VOLUME 90 also be placed in the amp's effect loop as a master volume control?
A: Due to the high impedance input and low impedance output it is possible to place the LEHLE MONO VOLUME 90 before the amp or in the amp's effect loop. The effect loop should be serial or if parallel set to 100% wet.
Weight 1480 g
Length 260 mm / 10.2"
Width 100 mm / 3.9"
Overall height 66 mm / 2.6"
Supply voltage 9 - 15 V DC
Current consumption 50 mA
Frequency range 35 Hz - 125 kHz (-3 / +0,4 dB)
Total harmonic distortion < 0.05 % (-10 dBu, 1 kHz)
Impedance input 2 MΩ
Impedance output 500 Ω
Max. level 3 V RMS / 11.8 dBu (at 12 V input voltage)
Max. gain 12 dB
Level noise floor -102 dBu (A-weighted)
Gitarre & Bass 2021.12
Joris Henke
The best thing about LEHLE's VOLUME Pedal was not only the high signal fidelity of the active circuit, but also the extreme accurate and absolute wear-free operation thanks to magnetic-sensor technology.
Amazona 2017.09
Axel Ritt
Swelling on a higher level!
With the MONO VOLUME 90, Lehle has created probably the best volume pedal currently on the market.
Grand Gtrs 2017.07
Christoph Arndt
Quiet pedals!
Burkhard Lehle's high-tech pedals are mechanically, electrically and ergonomically by far the best I've ever got in front of my feet.
Bass Quarterly 2017.07
Christoph Arndt
The ultimate answer on the subject of volume control.
The handling is self explaining, functionality absolutely convincing. Haptic and feel are brilliant. Simple changes in volume have never before given me so much mischievous pleasure!
Bonedo 2017.05
Haiko Heinz
Professional volume pedals
Concerning features and functionality both pedals [MONO VOLUME 90 & STEREO VOLUME] are beyond any doubt. Whoever doesn’t want to miss the quality of a professional volume pedal, does not get around the LEHLEs.
Guitar 2017.04
Jürgen Richter
Neutral sound in every setting
Sometimes it’s possible to improve already perfect pedals. So happened to the LEHLE STEREO VOLUME and the MONO VOLUME 90.

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I have the following questions on the product LEHLE MONO VOLUME 90 (Order code: 1024)
Joachim Joki Schaller
Tel +49 2855 850070