NAMM 2016: Lehle Showcasing the Lehle Mono Volume and the Acouswitch Junior

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At NAMM, Lehle is showing the Lehle Mono Volume and the Acouswitch Junior in their final design, exactly as they have been delivering them since late summer 2015. You can test both of them extensively at Booth 4750 in Hall C.

While you're there, check out two new Basswitch-Babies (pictured here), namely the Basswitch Dual Band Compressor and the Basswitch Enhanced Overdrive. The parent’s cooperative, consisting of Jacques Ruppert, Michael Eisenmann and Burkhard Georg Lehle find them mature enough for presentation. These new Basswitch family members will enter production just after the NAMM Show at our booth! 

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The Lehle Mono Volume 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 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 here in this case 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 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 ranges from -92 dB to 0 dB - so from a virtually muted level to the same volume. With a potentiometer a gain up to +10 dB boost can be additionally adjusted.

The Lehle Mono Volume 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.

Furthermore, the Lehle Mono Volume has a buffered direct out which can supply a tuner, DAW or a second amp without affecting the sound. 

The Acouswitch Junior is a compact multi-functional tool for musicians who perform on stage with electric instruments as well as with acoustic ones and wish to use the same effects for both with one pedal board. With two separately controllable high impedance inputs it becomes the control center within the electric and acoustic setup.
The control over which signal is sent to the PA or the amp remains with the musician, without re-plugging cables. It does not matter whether you're using it for acoustic music only or for a combination of both electric and acoustic instruments, the Acouswitch Junior is designed for both alternatives.

The Junior features an active DI Out (XLR) and a line-out jack as selectable outputs.

To allow universal usage, the A/B switch can be configured individually, depending on the setup:
For example, in one configuration line- and XLR output can be mutually muted, depending on the input being used. Toggling between the inputs is just as possible as mixing them together. For a purely acoustic setup the outputs can be always activated, too.

In addition to the 4-band EQ for channel A, the Acouswitch Junior has a serial effects loop, a tuner-out output with mute function and a built-in clean boost effect. Effects loop, mute function and boost can be managed via the mute / loop boost footswitch in various combinations.

The proven Lehle True Sound Technology with familiar features like the discrete JFET-input stage, or switching via gold-plated relays make sure that the Acouswitch Junior provides an excellent sound.

Internally the Junior also works with 18V, but nevertheless is content with all power supplies from 9 to 15V AC or DC. The extremely robust design with protected controllers and the almost indestructible switching mechanism provide many years of fun while playing with acoustic and electric setups. 

For more information, visit the Lehle website.