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1. 06 06 06 0 0 Folle 4 x j we 6166061010 _ _0 __ ele E gt a SIENESE amg BIESEN ES OE Rs pre ost rl oe 7 wa lol or olle telde l o DjO O O O O O 0 2 5155 9 Lehle TRUE SOUND TECHNOLOGY 6 The Acouswitch Junior as A B switcher preamp student teacher application olelelelele el oelelelelele ze oer oe ee er ES o Onan lt fos lalalala ooo a alala a a JUNIOR 0 lt A A a l l roa Fog EE O 0 lalalalalalala MUTE LOOP MB CROM 4 l a a 0 gt dd a S 191919 5 alajalalsjslajs 8 Lehle TRUE SOUND TECHNOLOGY Tech Talk True Bypass and True Sound Today more and more effect pedals feature true bypass switching to completely bypass the pedal in the signal routing when the pedal is switched off The target of this design is to ensure that
2. VoL A eo D 4 JUNIOR cup gt A D GIGI wa a a Blatt t a a ee Op os Beleef oe on OEE 0 lolo gt dj H lolo ee p a do t Lehle TRUE SOUND TECHNOLOGY olo o GL a a a 8 4 The Acouswitch Junior as preamp booster DI on a pedal board eo ce ce oo ACOUSWITCH oti 0 0 0 0 0 te fate fae fate a e a 616160161600 toost vers Belle ele er Gtt et JUNIOR r 2 e e old A A Gelede edet Q O 0 Z MUTE LOOP MB D DIO D DIGI MeN ond l e ae 21 QIg1919191919191919 alolalalalalalalala E Lehle TRUE SOUND TECHNOLOGY 5 The Acouswitch Junior as a preamp booster DI in a stand alone application with three instruments O o D q 0000 m1 ooo o15v R wo s TUNER OUT LINEOUT INSTB INSTA oo de elole
3. 9 4sul g 19A VISA any eur 45009 doo 1 SInW IG A4d n0 18 10 IPUBIS Technical data Weight Length Width Overall height Voltage range Power consumption Frequency range Distortion Input A impedance Input B impedance Send impedance Return Impedance Output impedance Signal to noise ratio Max level Max gain EQ Bass Low Mid High Mid Treble 1 065 g 15 cm 5 9 16 cm 6 3 43cm 1 7 9 15 V DC 7 12 V AC max 150 mA 50 Hz Low cut Filter 100 kHz 0 2 dB 0 005 5 MOhm 5 MOhm 250 Ohm 50 kOhm 250 Ohm 94 dB at 1 kHz 0 dBU 22 Hz 22 kHz 5 V RMS ca 16 dBU 15 dB 15 dB 80 Hz peaking 15 dB 360 Hz peaking 15 dB 2 kHz peaking 12 5 dB 10 kHz shelving Product Guarantee 1 This product is covered by a limited scope Product Guarantee for a period of two years from the date of purchase of the unit 2 The guarantee is restricted to the free of charge rectification of material and manufac turing defects by means of repair or replace ment at the manufacturer s option 3 The guarantee includes free of charge re turn of the unit to the customer The customer Shall bear the costs of returning the unit to the Lehle Customer Service 4 All guarantee repairs shall be performed by a
4. Input INST Connect your second instrument here or the 2 pickup of the same instrument In Electro Acoustic Mode INST B is the appro priate input jack for the electric instrument because the signal from INST B then will be routed to LINE OUT Channel B pursues the philosophy of not routing the signal through unneeded electronics but rather keeps it pure and unprocessed The input gain for this channel can be adjusted via VOL B lf only Input A is being used the foot switch toggles the input A signal between channel A and channel B This allows to set up your basic sound on your amp using the straight through channel B and to have a second sound setting available by pressing the foot switch either for a second instrument or for a change of style 3 LINE OUT Connect your amplifier here When operating the Acouswitch Junior in Electro Acoustic Mode the amp for the electric instrument should be connected here In this mode only the signal from INST B is routed to the LINE OUT but not the signal INST A 4 TUNER OUT Connect your tuner here Connecting your tuner here guarantees that the tuner is completely out of the signal path and does not cause sound losses It allows you to keep your tuner on all the time so that you can check your tuning and intonation control on the fly To defeat the sound while tuning set the Mute Loop Boost button to Mute Mode and then switch the Mute Loop Boost button until the LED shines
5. B against INST B alone For details see Change the operating modes of the A B switch Is just an instrument connected to INST A and INST B remains free the A B switch effects a Switchover of the input signal to channel A with EQ or channel B That way you can tog gle with one instrument between two different sounds 18 MUTE LOOP BOOST foot switch Press this switch depending on the mode for turning on off the booster the effects loops or the muting The function of this switch changes depending on the selected mode You can optionally turn on off the boost turn on off the effects loop and the boost or muting the Acouswitch Junior For details of the modes and how to operate them see Change the operating mode of the Mute Loop Boost switch 19 DI OUT Use this output for connecting the Acouswitch Junior with an XLR cable to a mixing console 11 The switched signal is symmetrically available at the 01 output Whether and which signal is routed to the DI Out depends on the operating mode of the A B switch In Classic Mode the selected signal is always routed to the DI Out whereas in Electro Acoustic Mode the DI Out is muted when channel B is on In Teacher s Mode the selected input signal A B or B is always transmitted to the DI Out The max imum level at the DI Out is about 10 dBU 20 GROUND switch Press the GROUND switch to eliminate ambi ent noise In pressed condition the shielding of the Acouswitch Junior and
6. Boost button has no mute function Shortly LED shines blue Loop on Boost on Mute in active LED is off Loop off Boost on Mute inactive In Boost Mode the Mute Loop Boost button af fects only the boost function The serial FX loop is active whether the instru ment signal is boosted or not In this configu ration the Mute Loop Boost button also has no mute function Shortly LED shines blue Boost and Loop on Mute inactive LED is off Boost off Loop on Mute inactive In Loop Boost Mode the Mute Loop Boost button switches the serial FX loop along with the booster In this configuration the Mute Loop Boost but ton has no mute function When the LED shines blue the Boost function intensity can be set via the Boost potentiometer is selected as is the serial FX loop If the LED is off in Loop Boost Mode boost function and FX loop are off Shortly LED shines blue Loop and Boost on Mute inactive LED is off Loop and Boost off Mute inactive Description TUNER OUT LINE OUT INST B INST A 16 MUTE LOOP BOOST an GROUND 4 Md PRE POST Lehle TRUE SOUND TECHNOLOGY 1 Input INST A Connect your first instrument here We recommend this input jack for acoustic instruments because this input to channel A has the tone controls and is routed to the DI Out in Electro Acoustic Mode The input gain for this channel can be adjusted via VOL A 2
7. at the beginning of the chain that brings the signal down to very low impedance This makes the signal insensitive to the length of the cable It is important however that this buffer is of the highest quality with the dynamic range and headroom necessary to ensure that all the details of the bass signal stay are retained unaltered The effect pedals in the downstream loops should then ideally have true bypass so that they will not have a negatively effect on the now buffered signal as the true bypass de sign does not reduce dynamics and headroom or produce any noise Conclusion having a True Sound Lehle buffer at the beginning of your effect chain combined with good true by pass equipped effects in the loop guarantees the best sound What is Lehle True Sound Technology Lehle True Sound Technology is a combination of several electrical design measures with only one aim in view to transmit the sound and the character of the instrument without altering it The voltage supplied to the Acous witch Junior is internally rectified filtered and stabilised and then brought to 18 V Supplying the buffer with 18 V gives enough headroom to guarantee an open and dynamic sound in all situations without losing any detail even when confronted with pickup power peaks of up to around 7 V The buffers are designed to effortlessly handle signals reaching the megahertz range At the output the frequency bandwidth is limited to pre
8. customer service organization authorized and approved by Lehle GmbH 5 The guarantee shall be deemed to become null and void if the product has been modified or damaged by incorrect use negligence dis mantling changes made by non authorized customer service organizations or by the use of non original spare or replacement parts 6 Lehle GmbH is unable to accept any liability whatsoever for any and all consequential dam age resulting from the use of this product Please proceed as follows if it should become necessary to return your product 1 Please firstly contact us support lehle com in order that the fault can be ascertained and trouble free processing assured 2 Please submit to us documentation re ceipts or similar clearly and unequivocally proving the date of purchase of the unit 3 Please send the unit carefully packed the original packing is best at your own expense to Lehle GmbH Grenzstrasse 153 46562 Voerde Germany or to an authorized customer service organiza tion named by ourselves Ruppert Musical Instruments 20a rue de Bascharage L 4995 Schouweiler Luxembourg Tel Fax 00 352 691 379050 Web www rmi lu E Mail jacques rmi lu
9. long life sometimes sensitively but some times more brutally depending on the situation and the musicians tempera ment An ordinary foot switch will switch up to 20 000 times before wearing out mechan ically or electrically which means that either it will stop working altogether or the signal will start to lose transparency and dynam ics The Acouswitch Junior is equipped with high quality Lehle foot switches Here the foot of the musician does not press an ordinary foot switch but an actuator button that activates a push button inside the Acouswitch Junior via a kd metal lever Because the actuator button and the internal push button are not directly con nected the load exerted by the foot is absorbed by the actuator button and the housing pre serving the circuit board from mechanical stress The design is as robust as possibly and the actuator button mounted in a special socket making for easy and silent operation Inside the Acouswitch Junior the impulse from the push button triggers a processor based on the ARM Cortex M technology which con trols the switching operation very quickly and precisely This way the switching is done only via high quality relays and thus guaranteeing absolutely reliable and loss free switching of very sensitive signals The switching technol ogy and the gold plated relays in the Acous witch Junior are designed to operate for up to two million switching cycles puss Une doo xIW 9
10. the XLR cable get con nected When you have any doubts adjust the GROUND switch through trial and error to have no humming noise 21 PRE POST switch Press the PRE POST switch to eliminate the EQ and the loop from the DI signal path By pressing this switch the signal goes directly to the DI output without passing through the EQ the serial loop or the boost of the Acous witch Junior The Line Out is not affected For studio recordings it is more advantageous to record the signal unedited and edit it later This setup enables the musician to hear his recorded signals as usual with EQ and ef fects via Line Out in the PRE mode while at the same time the signal of the instrument is picked up directly behind the Volume control of channel A or B and transmitted via the DI output of the Acouswitch Junior unedited The effects can be added to the recording during the mix via re amping which usually leads to better results Examples of possible setups 1 The Acouswitch Junior as A B switcher preamp booster DI in a stand alone application JUNIOR ACOUSWITCH HM T VOL A 8 O 2 wure oor Boost OT 00 ea Tn 00 00 mw gt 99 9 9098 AAO 00 oo x pond 09
11. Ruppert Musical Instruments ACOUSWITCH JUNIOR User Manual Ruppert Musical Instruments 20a rue de Bascharage L 4995 Schouweiler Luxembourg Tel Fax 00 352 691 379050 Web www rmi lu E Mail jacques rmi lu Congratulations With the RMI Acouswitch Junior you have pur chased a high quality piece of musical equip ment that will open up new dimensions in am plification of acoustic instruments and signal routing When developing the RMI Acouswitch Junior we focused on the needs and wishes of the professional musician who is not willing to compromise on either sound or the technical quality of the equipment The RMI Acouswitch Junior is manufactured assembled and tested in Germany to the highest quality standards using only the best brand components avail able to ensure optimal treatment of the elec trical signal from your instrument The RMI Acouswitch Junior is an all rounder equally suitable for electric and acoustic in struments Whether the signal comes from a magnetic or a piezo pickup the high end preamp of the RMI Acouswitch Junior will ensure that their specific characteristics are uncompromised Due to its functional design the RMI Acous witch Junior offers an all in one solution for every musician who performs on stage with both electric and acoustic instruments The RMI Acouswitch Junior can be used in stand alone mode or as the control centre of a pedal board It is an input switcher a hi
12. The Acouswitch Junior can be used to send the output signal directly to a mixing console The Setting the operating modes Changing the operating mode of the A B switch To change the operating mode of the A B Switch line in foot switch on the right pro ceed as follows Disconnect the Acouswitch Junior from the power supply As a precaution we recom mend to disconnect all other cables or at least to ensure that all devices connected to the Acouswitch Junior are turned off Other wise unwanted noise could occur 2 Keep the A B button pressed 3 Connect the Acouswitch Junior to the mains supply by plugging the power supply plug into the fitting input jack 9 15 V leftmost of your Acouswitch Junior high quality components and features of the Acouswitch Junior high end preamp ground switch PRE POST signal processing switch rugged construction make the Acouswitch Junior an excellent DI box be it in a live setting or in a recording situation Additional features TUNER OUT Connect your tuner here to keep it out of the signal path and prevent poten tial sound losses This way the tuner can be on all the time allowing you to check your tuning on the fly Lehle True Sound Technology for details please consult the chapter Tech Talk p 16 Specially design to protect the controls from damage and to prevent inadvertent chang es to the settings The design of the housing permits easy installation the ultra f
13. blue Then the MUTE button defeats both the LINE OUT and the DI OUT 5 SEND output Serial Loop Connect the first effect you want to run in the serial loop here The serial loop allows to integrate an external effects unit 6 RETURN input Serial Loop Connect the output of the last effect connected to the SEND of the serial loop here If the Return jack is not used the signal from the send jack is present The return socket can also be used for a third active instrument If the Loop or Loop Boost Mode is active see Changing the operating modes of the Mute Loop Boost switch the Loop Boost button will activate the third instrument 7 External power supply Connect your external power supply here 9 15 V DC or 7 12 VAC 150 mA min Battery operation is not suitable for this device The external power supply should provide not less than 9 V and not more than 15 V Either alternating AC or direct current DC sources can be used and the polarity is not relevant AC power sources from to 12 V can also be used The voltage supplied is internally rectified fil tered stabilised and then brought to 18 V To get the best out of your pedal setup we recommend that you use high quality power supplies with isolated output sections in your setup 8 Volume control channel A Adjust with this control the volume of channel A This control adjusts the volume of channel A To permit optimal matching of the volume between chann
14. el A and channel B this control enables you to boost and to cut the signal the neutral position is at 12 o clock The high end preamp used here allows you to connect the Acouswitch Junior directly to a power amp 9 Bass control Adjust with this control the amount of bass in your tone of channel A The bass control B is specifically designed for acoustic instruments in order to cut or boost the low frequencies by 15 dB with a peak filter characteristic of about 80 Hz 10 LM control Adjust with this control the amount of low mids of channel A This control is designed for cutting and boost ing the low mids by 15 dB with a peak filter characteristic The spectrum to be controlled is already preset and is at 360 Hz 11 HM control Adjust with this control the amount of high mids of channel A This control is designed for cutting and boost ing the high mids by 15 dB with a peak filter characteristic The spectrum to be con trolled is already preset and is at 2 kHz 12 Treble control Adjust with this control the amount of treble of channel A With the treble control you can cut or boost high frequencies by 12 5 dB via a shelving filter at 10 kHz 13 Volume control channel B Adjust with this control the volume of channel B This control adjusts the volume of channel B To permit optimal matching of the volume between channel A and channel B this control enables you to boost and to cut the signal the ne
15. gh end pre amp a clean booster a 4 band EQ an FX loop switcher and last but not least a profession al quality active DI box The different operat ing modes allow a variety of uses united in the smallest space wish you every success with your RMI Acous witch Junior Yours Jacques Ruppert Summary Introduction Setting the operating modes Description Examples of possible setups Tech Talk Signal Flow Diagram Technical data Product Guarantee Introduction Why a specific preamp switcher DI pedal for acoustic instruments AND electric instru ments The reasons are obvious Many musicians use different instruments on stage switch between electric and acous tic guitars between cello and electric guitar or other instruments back and forth which they also like to independently mute boost or send though a few effects as well as route them arbitrarily to an amp or to a DI box or a mixer However acoustic instruments have a characteristic attack with a very steep initial transient followed by a weak electrical signal On top of this the frequency range of acoustic instruments goes from deep fundamentals e g the low C string of a cello approx 65 Hz to very high overtones that have a crucial im pact on the timbre of the acoustic instrument even though they are approaching the upper limits of the audible spectrum These characteristics of acoustic signals make enormous demands on the electronics Only equipme
16. h p 5 16 Status display for MUTE LOOP BOOST This LED shows different switching statuses depending on the adjusted mode The LED shines blue when the preset function is on That means In Mute Mode LED shines blue Mute on all is muted LED is off Loop and Boost on In Loop Mode LED shines blue Loop and Boost on Mute inactive LED is off Loop off Boost on Mute inactive In Boost Mode LED shines blue Boost and Loop on Mute inactive LED is off Boost off Loop on Mute inactive In Loop Boost Mode LED shines blue Loop and Boost on Mute inactive LED is off Loop and Boost off Mute inactive For details see Change the operating mode of the Mute Loop Boost switch 17 A B foot switch Press this switch depending on the mode to select between INST A and INST B to route from INST A to channel A or B or to switch be tween INST A INST or just INST B The function of this switch changes depending on the selected mode It is also dependent on whether an instrument is connected to INST B or not In Classic Mode this switch toggles between INST A and INST B the signal is rout ed to both outputs In Electro Acoustic Mode both instrument inputs are also alternately switched but in this mode each input is ex clusively assigned to one output the respec tively other output is then muted Thanks to the mix function in Teacher s Mode there is the option to switch INST A INST
17. lat base and remov able rubber feet allow the unit to be securely attached to the pedal board using Velcro or Similar 4 The LED above the A B button now flashes a sequence of 3 different flashing signals flashes 1 Classic Mode flashes 2x Electro Acoustic Mode eee flashes 3x Teacher s Mode Depending on the flashing signal that is shown at the moment you release the A B button you choose Classic Mode Electro Acoustic Mode or Teacher s Mode The se lected mode will stay even when you dis connect your Acouswitch Junior from the power supply until you set another operat ing mode as described above In Classic Mode input A and B are switched alternately so B is muted when A is on and vice versa If input A INST A is selected the LED above the foot switch will shine blue if INST B is activated the LED will light up steady white The outputs Line Out and DI Out are always on so the selected instrument signal is always routed to both outputs Shortly LED shines blue INST A selected EQ Line Out and DI Out on LED shines white INST B selected no EQ Line Out and DI Out on No mixing function In Electro Acoustic Mode as in Classic Mode the two instruments are switched alternately so B is muted if A is on and vice versa The Special feature of this mode is that each in put is exclusively assigned to an output The respectively other output will then be muted In
18. nt specifically designed for the purpose is able to handle such a demanding signal pattern adequately The Acouswitch Ju nior is able to meet these requirements Functions and applications overview The Acouswitch Junior offers versatile ap plications that can be adjusted before use For details on how the modes can easily be Switched see Setting the operating modes If you have any questions feel free to contact our support support acouswitch com Acouswitch Junior as input switcher The inputs A and B have an impedance of 5 MOhm each Both inputs can be used for different instruments The A B foot switch permits toggling between the two inputs If no cable is connected to the instrument B input the signal from instru ment A can be routed to channel A or B by using the A B foot switch Where and how your instrument signal is switched depends on the selected operating mode In Classic Mode the selected instrument is always routed to both outputs whereas in Electro Acoustic Mode the outputs are alternately muted depending on the selected instrument input In Teacher s Mode there is a mix function which means that you can also toggle between A B and B only For details about the switching functions see Changing the operating mode of the A B switch p 5 Acouswitch Junior as high end preamp with 4 band EQ Channel A of the Acouswitch Junior features a high end preamp and a 4 band EQ specifically designed for acoustic in
19. oo LG D on Oee 9908 AAO Oee an 4 590086 Oee 4 596086 aan Oee a 100088 Oee 4 100090 Oee an ag 3 2 2 OG G ooo 2 The Acouswitch Junior as A B switcher preamp booster DI on a pedal board TUNEROUT OUT INST JUNIOR e Hm oo LZ 10 oo ele oo mw 9 09 00 0 9 HOUD AHO 00 eel x 0 0009 HHO 0999 9900 Oee x 9 0999 Oooo Oee a Ol ananin sao Oee oan Oee aam Oee aam Oee xn Ol oranga HAD Oee taanga Hanno 2 Leh 95555999 POWER SUPPLY 3 The Acouswitch Junior as a preamp booster DI in a stand alone application O o BI sl ooo OS LNEOUT INSTA ee eo 0 0 0 8 9 9 9 9 O O o
20. strument A which is supposed to be an acoustic instrument will then be routed to the DI Out Instrument B an electric guitar for example will be solely routed to Line Out which could be connected to a guitar amp for example Shortly LED shines blue INST A selected EQ DI Out on Line Out muted LED shines white INST B selected Line Out on DI Out muted No mixing function In Teacher s Mode there is now a mixing func tion If the LED shines blue both inputs are se lected and will also be routed to both outputs So two instruments can be amplified simulta neously and connected e g with a guitar amp via Line Out and with a mixer via DI Out This way two players can use the same amp for example teacher and student If you switch now and the LED shines white only input B will be active and routed to both outputs In Teacher s Mode the mix function also al lows to use two pickup systems for the same instrument e g mic and piezo simultaneously and mix boost switch and filter them with the Acouswitch Junior Shortly LED shines blue Mix on INST A and INST B Line Out and DI Out on Signal A with EQ Sig nal B without EQ LED shines white INST B only Line Out and DI Out on The instrument signal stays clean Changing the operating mode of the Mute Loop Boost switch To change the operating mode of the Mute Loop Boost switch foot switch on the left proceed as follo
21. struments Featuring bass low mids high mids and treble controls it is easy and intuitive to use In stand alone use the pedal can drive a pow eramp an active monitor or an in ear monitor ing system Channel B pursues the philosophy of not rout ing the signal through unneeded electronics but rather keeps it pure and unprocessed For this reason channel B has no EQ Since each channel has its own volume controller the vol ume of both channels can be easily balanced in any operating mode Acouswitch Junior as FX looper The Acouswitch Junior has one serial FX loop which depending on the operating mode can be switched In Loop Boost Mode this FX loop can be switched together with the boost func tion How to change the mode of the Mute Loop Boost switch to Loop Boost Mode see Changing the operating mode of the Mute Loop Boost switch p 6 Acouswitch Junior as clean booster Depending on the operating mode of the Mute Loop Boost switch a second controllable am plifier stage can be added via the foot switch behind the serial FX loop The final amplification of the booster can be adjusted via the BOOST potentiometer The mode in which the boost function is switched exclusively is called the Boost Mode Here the Mute Loop Boost button switches the booster on and off In Mute Mode this second amplifier stage is always on so the final volume can be adjusted via the BOOST potentiometer Acouswitch Junior as DI box
22. the pedal does not affect the elec trical signal when it is switched off This way the sound is left unaltered in theory In practice however connecting several ped als featuring a true bypass design in series does not improve the sound or keep it unal tered at all Long runs of cable and multiple connections lead to a weak and lifeless sound On large pedal boards the overall length of the cable is enough for the capacitance of the ca ble have a negative effect on the sound The capacitance of the cable acts as a low pass filter the low frequencies pass through the filter while the high frequencies are filtered out The price and quality of the cable you are using will not change this physical phe nomenon A solution would be to use only devices with buffered bypass design instead of true by pass This however is only a good solution if the buffer is of very high quality If several units with buffered bypass are connected in Series it only needs one buffer to be noisy cut the dynamics of the sound signal or negatively affect the sound in any other way for the sound of the whole effect chain to be spoilt As the saying goes a chain is only as strong as its weakest link In addition the noise of the individual buffers adds up to produce audible noise it is a fact that every buffer produces some noise even if it cannot be heard when only a single buffer is used The ideal solution is to have a very high quality buffer
23. utral position is at 6 o clock 14 BOOST control Adjust with this control the boost level or the output volume of the entire device Whether the booster is switched on or always is on depends on the mode of the Mute Loop Boost control see Changing the operating mode of the Mute Loop Boost switch p 6 The booster is behind the serial FX loop In Boost Mode the booster can be used as solo boost In Loop Boost Mode the serial loop is switched together with the Boost For all modes applies BOOST control rightmost 1 o clock no gain control leftmost 11 o clock gain of 12 dB The signal level can therefore only be boosted but not cut with this potentiometer 15 Status display for foot switch A B This LED shows different switching statuses depending on the adjusted mode Classic Mode LED shines blue INST A selected EQ Line Out and DI Out on LED shines white INST B selected no EQ Line Out and DI Out on No mix function Electro Acoustic Mode LED shines blue INST A selected EQ DI Out on Line Out muted 10 LED shines white INST B selected Line Out on DI Out muted No mix function Teacher s Mode LED shines blue Mix on INST A and INST B Line Out and DI Out on Signal A with EQ Sig nal B without EQ LED shines white INST B alone Line Out and DI Out on Instrument signal stays unchanged For details see Changing the operating mode of the A B switc
24. vent HF interfer ence from disturbing the electronic circuitry This technology guarantees optimal transient response by the circuitry and is key to obtain ing a sound that is transparent and above all cuts through For switching Lehle True Sound Technology uses exclusively gold plated con tact relays and or gold plated switches The decaying signal from a string is so weak that contact materials with lower conductivity have a negative impact on the sound Ordinary foot Switches use contact materials developed to Switch high voltages e g electrical power tools as this is their main field of application This can be heard for example when after a Switch has been in use for some time a de caying tone starts to break off abruptly Relays and switches with gold plated contacts do not have this problem and even the smallest electrical signals can be transmitted for years without being negatively affected In addition the relays used in the Acouswitch Junior have a lifetime about 100 times as long as those used in ordinary foot switches Together with typical Lehle electronic circuitry to reduce the switching pop of relays the combination of the above design features represents today s state of the art solution for an uncompromis ing preservation of the signal and hence the sound and character of the instrument Working principle of the Acouswitch Junior foot switches Foot switches are pressed thousands of times during their
25. ws 1 Disconnect the Acouswitch Junior from the power supply As a precaution we recom mend to disconnect all other cables or at least to ensure that all devices connected to the Acouswitch Junior are turned off Otherwise unwanted noise could occur 2 Keep the Mute Loop Boost button pressed 3 Connect the Acouswitch Junior to the mains supply by plugging the power supply plug into the fitting input jack 9 15 V leftmost of your Acouswitch Junior 4 The LED above the A B button now flashes a sequence of 4 different flashing signals e flashes 1x Mute Mode ee flashes 2x gt Loop Mode eee flashes 3x gt Boost Mode e flashes 4x Loop Boost Mode Depending on the flashing signal that is shown at the moment you release the A B button you choose Loop Boost Mode Boost Mode or Mute Mode The selected mode will stay even when you disconnect your Acous witch Junior from the power supply until you set another operating mode as described above In Mute Mode the serial FX loop Loop and the boost are active when the LED is off dark when the LED shines blue all will be muted Shortly LED shines blue Mute on Line Out and DI Out muted LED is off Loop and Boost In Loop Mode the Mute Loop Boost button af fects only the loop function The serial effects loop is active when the LED shines blue The boost function is always ac tive In this configuration the Mute Loop

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