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Order number: 1032
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the signal from the pickups of an electric guitar or bass is so weak that poor-quality cables, cold joints and cheap contact materials ruin your sound. Switch contacts need to be made of special materials to permit loss-free switching of these low-level signals. All Lehle switchers feature special relays and slide switches with gold-plated contacts for totally reliable, absolutely zero-loss switching.
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.
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 Mono Volume 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.
By means of the MIDI interface, control information can be exchanged. All LEHLE products with the MIDI symbol are able to be networked with external equipment, in order to control it and/or be controlled.
LEHLE products with an USB socket can be connected to a computer by means of this port. Updates, current supply and data transfer make a flexible integration in digital systems possible.
• Expression Pedal with 2 outputs
• Controls all common devices with expression inputs
• Magnetic sensor technology, without mechanical wear
• Precise control from digital potentiometers
• MIDI via USB
• Optimised size and weight
Express yourself, twice! The Lehle Dual Expression is an active, wear-free expression pedal equipped with a precise magnetic sensor.
Known from the Lehle Volume pedals, this sensor uses the Hall effect, named after Edwin Hall, to measure the strength of magnetic fields.
In the Lehle Dual Expression the Hall sensor is accurately calibrated to the built-in magnet and the control range of the pedal – where the pedal moves only the magnet, whose distance is measured by the Hall sensor.
Two digital potentiometers, working with analogue voltages, are used for the precise and reliable generation of the expression data.
This technology allows distinctly more accurate operation than is offered by conventional expression pedals with mechanical potentiometers. There is no mechanical wear, avoiding the need for maintenance or complicated adjustments.
Both outputs can control nearly all common devices with expression inputs from 5k to 100k, regardless if TS, TRS or RTS – the polarity can be switched and stored using the soft-push buttons.
Alternatively, the 10k output can be set to work as a latching or momentary switch, if the pedal is pushed in fully toe position. Then e.g. the channel of an amp can be changed or, connected to a switch-input of a digital device, any desired function can be controlled.
Via the USB socket you can send MIDI data to a computer, in order to control midi compatible software.
In use, the Lehle Dual Expression is extremely smooth and steady under foot, as it is equipped with low-friction bearings of a high-performance polymer. By means of an adjusting screw the mobility of the pedal can be modified with great precision.
Compared to the Lehle Mono Volume we were able to reduce the weight by 50% and the size by 35% – with the same rugged stability. It’s even 2 cm flatter, however the pedal range stays the same - just as comfortable and responsive as the larger models.
Light, small, and twice the precise expression: Lehle Dual Expression.
|Overall height||47 mm|
|Supply voltage||9-15 V DC|
|Current consumption||max. 100 mA|
|Max Level||10 V|