OWNERS MANUAL
Contents
1. 11 MIDDLE EDGE GooD THINGS KNOW MIDDLE FILTER This filter has an extended frequency range from 50Hz to 2kHz and facilitates total control over the midrange with wide SOME HINTS bandwidth giving a natural and non peaking result ny e Once you have connected either input A or B the battery is engaged e You do not need to remove the battery if you are powering the MicroBassII in another powering mode e If you are only using the OUTPUT you may power up and down the MicroBassII without audible pops if the Volume knob is set to minimum e For normal operation try to keep the Volume as high as possible e For best results always gain up the MicroBassII from the owe Boost and the Drive controls in minimum position e The Gnd Lift option cannot be used together with 48V EDGE FILTER The EDGE filter is a bell type filter peaking at P hantom P ir Either phantom or ground lift around 7kHz controlling the higher mids and treble registers giving e Trim the gains between the A and B channel in standard presence and edge A or B mode with the Drive knob set to minimum Then trim the gain with the Boost in channel A e You cannot use the headphones while using the 48V phantom power or The EBS Phantom Power System 0dB 0dB 10 lk 10 kHz Both MIDDLE and EDGE filters are located after the DRIVE controls which make them perfect for fine tuning the overdriven sound 10 7 INPUT BOOST INP2. GETTING STARTED DIRECT INJECTION BOX USING ONE INSTRUMENT USING TWO INSTRUMENTS REHEARSAL PREAMP GOOD TO KNOW THE CONTROLS AND FUNCTIONS CHANNEL INPUT 10 dB BoosT BASS TREBLE BRIGHT ENHANCED FILTER CHANNEL B MIDDLE EDGE DRIVE MODE SWITCH COMMON FEATURES TUBE SIM CONTROL SWITCHES EFFECTS LOOP BALANCED OUTPUT VOLUME INDICATORS POWERING MODES BATTERY REPLACEMENT TECHNICAL REFERENCE BLOCK DIAGRAM TECHNICAL SPECIFICATIONS PAGE NAM BR WwW 10 11 12 13 14 15 16 SEND EFFECTS LOOP BLOCK DIAGRAM TUBE SIMULATOR FX MIX LED CHB EDGE MIDDLE DRIVE STAGE ACTIVE U INPUT B 2 E 2 lu d 8 L1 oO gt 3 E MUTE LED MUTE 4 LED CH A Enhanced Pre e Speaker Simulator Y oN o a c 25 22 25 ao INPUT A PASSIVE a LINK U f POWERING MODES 1 DC Adapter EBS recommends the use of the EBS AD 9 DC power supply which supplies a well stabilized power to the EBS MicroBassII EBS Phantom Power The Phantom Power option allows you to power the MicroBassII from another EBS product such the GormET Drome bass combos or EBS active cabinets and so on When using the phantom power you need to connect a stereo 14 cable between the OUTPUT from the EBS MicroBassII and the input jack of the amplifier or if option is available on the amp to th
3. EDGE to 12 o clock 6 Make sure all switches are in the outer position 7 Connect to mixer from the Balanced XLR Output if required You may now switch the instruments with the A B foot switch Adjust the gain and EQ on the individual channels for personal taste By engaging the A B mode switch you will enter the mix mode and both channels will be mixed equally rather than selected individually This is useful for teaching purposes but is also a very good feature if you wish to mix two different pickup systems for example on an upright bass Here is where a piezo pickup would be connected to channel A and the standard pickup to channel B In this mode no channel LED will light GETTING STARTED REHEARSAL PREAMP MODE 1 Connect your instrument to input A 2 Connect headphones to the headphones jack 3 Set the A B switch so that Channel A is active 4 Set the BASS and TREBLE controls to 12 o clock and the BOOST to minimum position 5 Set the DRIVE control to minimum position and the MIDDLE and EDGE to 12 o clock 6 Make sure all switches are in the outer position 7 Setthe Volume to a moderate setting You have now a basic sound you may wish to adjust with a different gain and EQ settings You may now connect a CD player or another external source to the Effects Return jack In this rehearsal mode the FX MIX control will act as a balance between the background as connected to the return jack and your instrument Ver
4. SPECIFICATIONS Nominal Input Level Input Impedance Output Impedance Frequency Response Tone Controls Boost Control Drive Control Balanced Output Phones Power Requirements Powering Modes Dimensions Weight 0 3 dB Bass Treble Bright Midrange Frequency Range Edge Gain Gain Gain Type Low End Compensation Impedance Nominal Level Frequency Response XLR Connections Options Impedance Output Power Specifications are subject to change without notice 8 dBv 10 Mohms Ch A 1 Mohms Ch B 10 kohms 20 20 kHz 15 dB 100 Hz 15 dB 10 kHz shelving 12 dB 10 kHz 15dB gain 12 dB 50 2 000 Hz 0 80 12 dB 7 kHz 0 30 dB 0 35 Class Tube Emulator lt 250 Hz 500 ohms balanced 10 dBv 0 3 dB 20 Hz 30 kHz 1 GND 2 Hot 3 Cold GND Lift Speaker Sim Pre EQ 32 200 ohms recommended 75 mW per channel 32 ohms 9 V DC Regulated 10 mA 80 mA with Phones DC Power Supply Battery 48V Phantom power EBS Phantom Power System 6 0 153 mm Width 4 3 110 mm Height 2 3 58 mm Depth 875 g 1 95 Ib EBS MicroBassll DESIGNED AND DEVELOPED BY EBS SWEDEN AB GRINDSTUVAGEN 44 46 SE 16733 BROMMA SWEDEN T 46 8 735 00 10 FAX 46 8 735 00 05 Nov 2005 ebs info Q bass se www ebssweden com USERS MANUAL BLACK LABEL SERIES EBS MICROBASSII EBS FESSIONAL BASS EQUIPMENT CONTENTS
5. UT A A very low noise input suited for all types of instrument The very high impedance 10Mohms makes this input suitable for sensitive piezo pickup systems This is the default input 10 dB This switch changes the input sensitivity and impedance of the A channel input This option is useful when connecting active instruments to the EBS BOOST Control to adjust the instruments signal strength to the right operating level in the EBS MicroBassII This control goes from unity gain all the way up to 30dB with low noise For best results always try to gain from minimum position THE FILTERS The MicroBassII is equipped with very efficient filter controls to help you shape the sound further BASS and TREBLE FILTERS BRIGHT ENHANCED FILTER BRIGHT The bright is an advanced high pass filter capable of producing bright high treble timbre without adding practically any noise It gives 12dB boost at 10kHz and may give brightness to old passive pickups ENHANCED FILTER MODE The enhanced mode switch allows the Treble control to have effect on the midrange in this filter When boosting the treble the middles will be cut and vice versa This function is fully separated from channel B s MIDDLE filter Normal filter mode TREBLE H Enhanced filter mode TREBLE ES
6. e Depending upon your instrument you may change the input sensitivity with the Boost control up to the choice of your own OR 1 2 3 4 Connect your instrument to input A Connect to the amplifier from output LINK Push the PRE EQ switch Connect to mixer from the Balanced XLR Output GETTING STARTED USING ONE INSTRUMENT MODE 1 Connect your instrument to input A Connect the Output to power amplifier or amplifier head Set the A B switch so that Channel A is active Set the BASS and TREBLE controls to 12 o clock and the BOOST to minimum position Set the DRIVE control to minimum position and the MIDDLE and EDGE to 12 o clock Make sure all switches are in the outer position Connect to mixer from the Balanced XLR Output if required You can now dial in two different sound on the A and B channels respectively By engaging the A B mode switch you may now dial in your basic sound on channel A and when selecting B you will add the B to the A channel This is useful for overdriven sounds and lead playing Both LED s will now light THE OUTPUTS BALANCED OUTPUT Is a high quality balanced output The balanced output functions as an interface for connecting to PA mixing consoles or to studio or broadcast recording units Lifting ground is a great aid in many occasions When required set the Gnd Lift switch to its inner position to disconnect the ground from the output Note You cannot use the 48V phan
7. e effect return jack Please refer to the amps user manual on how to engage this on the amp 48V Phantom This is the standard microphone phantom power option found on mixing consoles and is fed through the balanced XLR output Refer to the operating instructions of the mixing console being used for further reference on how to activate the 48V phantom power 9V Battery Use a long life alkaline battery for best performance Note that the battery doesn t need to be removed when using another powering mode The battery will not be surged or charged BATTERY REPLACEMENT f j Se 9477 Say S j GETTING STARTED Thank you for choosing the EBS MicroBassll professional outboard preamp This manual will describe how to get the most out the MicroBassII preamp In this first section we will describe the basic modes of operation and give you a couple of hints The second section describes more in detail the different function and options available for your use GOOD LUCK THE DIRECT INJECTION BOX MODE 1 6 Connect your instrument to input A Connect to the amplifier from output LINK Set the A B switch so that Channel A is active Set the BASS and TREBLE controls to 12 o clock and the BOOST to minimum position Make sure no option switches are selected into inner position Connect to mixer from the Balanced XLR Output Now you have selected the active DI option with perfectly flat frequency respons
8. is provided with an effect loop for the use of external units such as box or rack effects FX MIX Controls the amount of effect all from 0 up to 100 When set to 100 the effects loop is purely serial and when the effects blend is 50 the effects loop works in parallel mode The effect loop is put before the balanced output so the effect signal will be present at the balanced output THE CONTROL SWITCHES There are two footswitches for rapidly changing the state of the EBS Selects active channel or If Mode switch on channel B is set to A B this switch selects channel A active or channel A AND B When using both inputs and the A B mode is selected you have the A and B mix mode selected so then this switch has no effect and no channel LED will light MUTE Mutes the Output Headphones output and Balanced Output This is useful when changing instruments or when tuning The Link output from channel A is not muted with this switch 12 GETTING STARTED USING TWo INSTRUMENTS MODE 1 Connect the first instrument to input A and the second to input B Normally you would connect the instrument with lowest output to channel A 2 Connect the Output to power amplifier or amplifier head 3 Set the A B switch so that Channel A is active 4 Set the BASS and TREBLE controls to 12 o clock and the BOOST to minimum position 5 Set the DRIVE control to minimum position and the MIDDLE and
9. tom powering option when the ground is lifted The EBS MicroBassII features a speaker simulator for the balanced output This feature is tuned together with a speaker cabinet in order to send the same sound image from the preamp as heard on stage To activate this function press the Spkr Sim switch The Pre EQ switch selects the source for the balanced output When pressed the balanced output takes its source from the A input pre filter and gain stages and the MUTE switch will not have any effect VOLUME The VOLUME knob controls the output volume for the OUTPUT and PHONES outputs The balanced output XLR is not affected by the setting of this knob HEADPHONES The headphones output enables you to use the as a rehearsal amp to play without a poweramp speaker cabinet configuration When using the headphones you cannot not use the 48V phantom power or the EBS Phantom Power System option due to the high power consumption THE INDICATORS e A Channel A active e Channel B active e MUTE Preamp is muted e 48V Microphone phantom power is powering the preamp e Batt Low battery Replace the battery immediately 13 COMMON FEATURES TUBE SIM This switch engages the tube simulation circuitry for the MicroBasslII In difference from the Drive circuitry this simulator is static and works only on fairly high levels giving a soft clip limiting effect EFFECTS LOOP EBS MicroBasslII
10. y useful for practicing and while rehearsing DRIVE MODE SWITCH DRIVE The DRIVE knob controls the amount of gain in the tube emulation stage and provides extra gain all the way up to 30 dB When pushing this control to distortion a tube like limitation is achieved The lower midrange and bass frequencies are bypassed in the Drive stage producing a warmer overdrive without saturation allowing the player to add more low bass than with conventional preamps The bass is compensated over the tube emulation stage which gives the same bass response up to mid distorted sounds The additional filters MIDDLE and EDGE are located post the DRIVE control which means that you are able to fine tune your overdriven tone further MODE SWITCH This switch controls how the B channel should work together with channel A In the outer position the channels operate separately either by using one instrument connected to channel A or two ones connected to A and B respectively In the inner position you have the option of putting channel B in series with channel A so with the A B switch you select either channel A or channel A and B The two channel indicate the status accordingly If you however have two instruments connected you will mix together the two channels equally Since the A B doesn t have any function no channel LED will light This last mode is very useful if you wish to mix two different pickup systems on one instrument
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