Lehle Mono Volume
Contents
1. Lehle GmbH Grenzstr 153 D 46562 Voerde Germany Tel 49 0 2855 850070 www lehle com Dear Musician Thank you for purchasing your Lehle Mono Volume have been building units that switch split and route signals with no technical compromises and with maximum musical fidelity since 1999 Your new Lehle Mono Volume comprises only the very best components Every module of your Lehle Mono Volume has been made and tested in Germany To make sure that you can enjoy your Lehle Mono Volume for a long time it is of extremely robust design and construction If you should nonetheless have a problem or simply a question just mail me or a member of the Lehle team at support lehle com wish you much pleasure and success with your Lehle Mono Volume i F Di Lal AR PCs AG ala fat __ Burkhard Georg Lehle Contents is Lex Le E 2 ee E A E EE 3 Eo o ne Se te nn 4 Typical uses Lehle Mono Volume as a classic volume pedal ccc eee eee eee eee 9 Lehle Mono Volume with two amps ccc eee eee ee ee eee eaese 10 Lehle Mono Volume to blend effects c eee eee eee eee eee 11 Lehle Mono Volume signal flow diagramme 14 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 sensor2. 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 while the distance is measured by the Hall sensor which controls a VCA A premium Blackmer VCA Voltage Controlled Amplifier from the United States replaces 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 im pedance 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 18 V thus achieving a total dynamic range of 110 dB The volume control of the Lehle Mono Volume ranges from 92 dB to O dB so from a virtually muted level to the same volume With a potentio meter a gain up to 10 dB boost can be additio nally adjusted The Lehle Mono Volume runs mechanically extremely smooth and steady as it i
3. ect a tuner to the jack named DIR 2 or leave this input vacant 3 Connect the VOL ack 4 to the input of your amp 4 Adjust the maximum volume using the gain control 3 5 There you go Lehle Mono Volume with two amps With this setup you can blend your original sound with the sound of a second amp The amp connected to the DIR out is always on while the second amp can be faded in and out smoothly via the VOL out Using the Lehle P Split II as shown here between the VOL output and the second amplifier is optional In case ground loops or phase cancellations occur these will be eliminated effectively by using the Lehle P Split II Grom mA 9 15V VOL GAIN DIR v MONO VOLUME Device connection Os Lehle Mono Volume Input 1 gt Instrument Output DIR 2 gt Amp 1 Output VOL 4 gt Amp 2 Lehle P Split Il Input Output VOL 4 Lehle O ISO Out gt Amp 2 How to do this 1 Connect your instrument to the input jack 1 of the Lehle Mono Volume la A 2 Connect the amp that shall be always on to the DIR out 2 Lehle Mono Volume to blend effects 3 Connect the VOL jack 4 to the input of your second amp 4 Adjust the maximum volume for your second amp using the gain control 3 ess 5 If now hum or noise occurs when the pedal is in 9 level position we recommend using the Lehle P Split Il 6 To include the Lehle P Split II take the plug i from the input of
4. external power supply here 9 15 V DC or 7 12 V AC For the Lehle Mono Volume an external power supply is required This should provide a minimum of 9 V and no more than 15 V DC but alternatively you can also connect an AC voltage source with more than 7 V or up to 12 V The polarity is not relevant The voltage supplied is internally rectified filtered stabilised and then brought to 18 V 6 Pedal Feel E Turn this screw to adjust the feel of the pedal If you turn this screw clockwise you tighten the brake This way the pedal feel will be heavier Turning the screw counterclockwise diminishes the resistance when pressing and gives the pedal a lighter feel 7 Base and fixing E You can use the fixing screws supplied with the Lehle Mono Volume to fix it to a base plate or to a pedal board for example The base of the Lehle Mono Volume can be easily attached on any base plate with Velcro or the supplied screws First we recommend you to pull out the rubber pads on the bottom If a rubber buffer gets lost in this process or breaks you will get a replacement at any time Fixing the Lehle Mono Volume with screws Place the volume pedal without the rubber buffers in the position where you want to attach it to the board Use a fine point pen or a sharp pencil to sketch the subsequent screw holes through the mounting holes onto the base plate Now drill at the site of the later screw holes a hole with a diameter of appr
5. oximately 2 5 mm 1 10 inch Then turn in the two screws for the U shaped mounting holes together with the washers just halfway Slide the volume pedal with the U shaped mount ing holes under the screw heads of the screws already turned in Make sure that the washers are placed between the bottom plate of the Lehle Mono Volume and the screw head to protect the paint Now you can turn in the remaining two screws and spacers through the two round mounting holes next to the jack plugs Tighten those screws only slightly then fix the screws you first turned in This type of mounting is extremely stable and can also be easily removed Tip In case you prefer a Velcro solution for your pedal board we recommend to write down the serial number of the pedal for eventual support matters before covering it Typical uses Lehle Mono Volume as a classic volume pedal 9 15V VOL GAIN DIR v MONO VOLUME PRECISION MAGNETIC SENSOR LehleC The main purpose of the Lehle Mono Volume certainly is adjusting the volume of the connected instrument The DIR output can be used for a tuner to silently tune the instrument with the VOL output volume turned down Of course this output can remain free Device connection Input 1 gt Instrument Output DIR 2 gt Tuner or nothing Output VOL 4 gt Amp mixer How to do this 1 Connect your instrument to the input jack 1 of the Lehle Mono Volume 2 Conn
6. s 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 Technical data BEE Weight Lengih Width Overall height Voltage Power consumption Frequency range THD Impedance input Impedance output Signal to noise ratio Max level Gain control max amplification 1 620 g 26 cm 10 24 10 cm 3 24 6 6 cm 2 6 9 15VDCor7 12VAC 50 mA 50 Hz 100 kHz all controls in middle position lt 0 05 at 1 kHz 10 dBu 2 MOhm 500 Ohm 102 dB at 1 kHz O dBu A weighted control in unity gain position 3 V RMS ca 12 dBu at 12 V input voltage 10 dB General description 1 Input socket E Connect your instrument here The Lehle Mono Volume processes signals of electric and acoustic stringed instruments as guitars and basses steel string and nylon string acoustics and acoustic string instruments of all kinds violins with pickup systems The input im pedance of the Lehle Mono Volume is approx 2 MOhm It does not matter whether the connected signal has high or low impedance or if it comes from a passive or an active pickup system 2 DIR Out E Connect your tuner or yo
7. t the required mixing ratio for the effects signal and the dry signal while the Lehle Mono Volume is in level position If necessary press the phase switch on the Lehle Parallel M There you go Lehle Mono Volume signal flow diagram Input DIR Out
8. the second amp and connect it o e me to the input of the Lehle P Split II MONO VOLUME 7 Connect the ISO output of the Lehle P Split II e 9e with the input of your second amp 8 Now press the ground switch of the Lehle P Split Il and find out in which position you have the least noise In order to eliminate phase cancellation press the phase switch 9 There you go O Parallel EE o LehleC Many effects like delay chorus or reverb sound much better when they are blended with the dry instrument signal This can also be done with the Lehle Mono Volume However you will need a mixer in our example we are using a Lehle Parallel M Device connection Lehle Mono Volume Input 1 gt Instrument Output DIR 2 gt Input Lehle Parallel M Output VOL 4 gt Input effects unit Lehle Parallel M Input gt Output DIR 2 Return R gt Output effects unit Output gt Amp How to do this 1 Connect your instrument to the input jack 1 of the Lehle Mono Volume 2 Connect the DIR out 2 to the input of the Lehle Parallel M 3 Connect the VOL ack 4 to the input of the 8 9 effects unit Connect the output of the effects unit to the return jack of the Lehle Parallel M Connect the output of the Lehle Parallel M to the amp Adjust the maximum volume for the input of your effects unit with the gain controller Use the MIX controller on the Lehle Parallel M to se
9. ur amp here This output supplies the input signal with exactly the same level The DIR Out is buffered which means you can connect both high and low imped ance inputs to the DIR Out without influencing the sound of the input signal If you are using a tuner you can mute the VOL Out for tuning and the DIR Out will provide a signal for the tuner 3 Gain control E Use the gain control to adjust the level of the preamp signal The gain control influences the maximum volume of the Lehle Mono Volume The gain control knob consists of black anodized aluminium and is recessed into the housing It can be easily turned by placing your fingertip in the top depression with the great advantage that thanks to the recessed design the setting cannot be inadver tently disturbed on stage or during transportation With the gain control closed up to the stop 7 00 o clock position and the pedal in level position the signal is neither amplified nor attenuated this position is unity gain Turning this control to the right will increase the signal by approx 10 dB The frequency range is not influenced by this control 4 Output socket E Connect your target device here For instance this would be an amplifier a mixer panel a stage box or a sound card This output like the DIR Out has low impedance and does not change its output impedance when the volume is altered via the volume pedal 5 External power supply E Connect your
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