Boss LMB-3 Owner's Manual
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Boss LMB-3 Owner's Manual

Bass limiter enhancer
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Owner's Manual
AC
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AC & BATTERY
POWERED
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Summary of Contents for Boss LMB-3

  • Page 1 Owner's Manual AC & BATTERY POWERED...
  • Page 2 FEATURES • The BOSS LMB-3 is a limiter/enhancer specifically designed for electric bass. • The LMB-3 allows you to create a well-balanced sound by controlling the volume difference of the sound or to avoid sound distortion. • By adjusting the THRESHOLD level and RATIO knobs, the intensity of the limiter can be spontaneously controlled.

  • Page 3: Important Notes

    IMPORTANT NOTES When using an AC adaptor, use only the specified device (PSA Series). Use of any other AC adaptor could result in damage, malfunction or electric shock. POWER SUPPLY The power requirement for this unit is indicated on its nameplate (rear panel). Ensure that the voltage in your installation meets this requirement.

  • Page 4: Panel Descriptions

    PANEL DESCRIPTIONS AC Adaptor Jack Accepts connection of an AC Adaptor (op- tionally available BOSS PSA-Series). By using an AC Adaptor, you can play without being concerned about how much battery power you have left. * You may find that it is a good idea to keep a battery installed in the unit even while using an adaptor.

  • Page 5: Output Jack

    CHECK Indicator This indicator shows whether an effect is ON/OFF, and also doubles as the Battery Check indicator. The indicator lights when an effect is ON. If this indicator goes dim or no longer lights while an effect is ON, the battery is near exhaustion and should be replaced imme- diately.

  • Page 6: Level Knob

    LEVEL Knob ENHANCE Knob CHECK LEVEL ENHANCE 1 : 1 MIN MAX MIN MAX RATIO Knob THRESHOLD Knob LEVEL Knob This knob adjusts the level of the effect sounds. Set the knob so there is no volume difference between the effect and straight guitar sounds. * If this knob is rotated completely counter- clockwise, no sound will be heard.

  • Page 7: Making The Connections

    MAKING THE CONNECTIONS Amplifier * Inserting a plug into the Input Jack will automatically switch the unit on. * Before connecting or disconnecting any patch cords, be sure all the volume controls in your system are set to minimum. This will help prevent any damage to system components. AC Adaptor (PSA-Series ;...

  • Page 8: Operating The Unit

    OPERATING THE UNIT When you have made the necessary connections, set the knobs as shown in the illustration. Depress the pedal switch to turn the effect on. (Make sure that the CHECK Indicator lights.) Adjust the Threshold Level (the level at which compres- sion starts) using the THRESHOLD Knob.
  • Page 9 ABOUT THE LIMITER'S ACTION The LMB-3’s limiter will function differently depending upon how you set the Ratio and Threshold Levels. The RATIO and THRESHOLD knobs work as described below. RATIO : The compression ratio for the input signal is called Ratio. For instance, when the Ratio is set to “2:1”, an input signal that is 6 dB louder than the...
  • Page 10 The following figure shows how the output signal is affected by the settings of the RATIO and THRESHOLD knobs. Threshold Level Ratio = a : b Input Level (dBm) Threshold Level Input Level (dBm)

  • Page 11: Changing The Battery

    CHANGING THE BATTERY When the indicator goes dim or no longer lights while an effect is on, it means that the battery is nearly dead and must be replaced. Replace the battery following the steps below. Battery Snap Cord Battery Snap 9V Battery Loosen the thumbscrew at the front of the pedal, then lift the pedal upwards to open the...

  • Page 12: Sample Setting

    SAMPLE SETTING Limiter CHECK LEVEL ENHANCE 1 : 1 MIN MAX MIN MAX Finger Picking CHECK LEVEL ENHANCE MIN MAX MIN MAX 1 : 1 Enhancer RATIO THSHD MIN MAX Slapping Play RATIO THSHD MIN MAX CHECK LEVEL ENHANCE RATIO THSHD 1 : 1 MIN MAX...

  • Page 13: Setting Memo

    SETTING MEMO CHECK LEVEL ENHANCE RATIO MIN MAX MIN MAX 1 : 1 CHECK LEVEL ENHANCE RATIO MIN MAX MIN MAX 1 : 1 THSHD MIN MAX THSHD MIN MAX CHECK LEVEL ENHANCE RATIO THSHD MIN MAX MIN MAX 1 : 1 MIN MAX CHECK LEVEL...

  • Page 14: Specifications

    SPECIFICATIONS LMB-3 : Bass Limiter Enhancer Nominal Input Level ... -20 dBm Input Impedance ... 1 M Nominal Output Level ... -20 dBm Output Impedance ... 1 k Recommended Load Impedance 10 k or greater Residual Noise Level ... -86 dBm (IHF-A, Typ.) Controls ...
  • Page 15 * In the interest of product development, the specifications and/or appearance of this unit are subject to change without prior notice. 2-3/4 (W) x 4-15/16 (D) x 2-3/16 (H) inches Roland Service This product complies with the requirements of European Directive 89/336/EEC.
  • Page 16 678767...

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