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manual abstract
©1995 BOSS Corporation All right reserved. No part of this publication may be reproduced in any form without the written permission of BOSS Corporation. FEATURES FEATURES The BOSS GEB-7 is a 7-band equalizer designed specifically for electric bass. • Since it allows for a broad range of frequency settings, even five string basses can be accommodated. • The unit is designed to provide the optimum Q (equalizer's bandwidth) for bass for each center frequency. While making it easy to obtain the most delicate of nuances, it also allows for radically unique settings as well. • The GEB-7 allows you to adjust the output level of the equalized sound so it matches the level of the input sound. PANEL DESCRIPTIONS 1 3 4 5 1. AC Adaptor Jack 2 Accepts connection of an AC Adaptor (optionally 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 6 battery installed in the unit even while using an adaptor. That way your playing won’t be disrupted even if the adaptor is accidentally disconnected. * If you are going to use an AC adaptor, be sure to use the specified unit (BOSS PSA-Series). Use of any other adaptor may result in damage, malfunction or electric shock. Also, if you are not going to be using it for an extended period of time, disconnect the AC adaptor from the AC outlet. 2.2. 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 immediately. 3. OUTPUT Jack The output jacks are used to connect the unit to amplifiers or other devices. 4. Pedal Switch This switch turns the effects ON/OFF. 5. Thumbscrew This thumbscrew is loosened to open the pedal, allowing battery replacement. For instructions on how to replace the battery, please refer to “CHANGING THE BATTERY”. 6. INPUT Jack This jack accepts input signals (coming from a bass guitar, some other musical instrument, or another effects unit). * The INPUT jack also serves as the power switch. Power is turned on whenever a plug is inserted into the INPUT jack, and is turned off when the plug is disconnected. When not using the unit, you should disconnect any cord connected to the INPUT jack. Equalizer Control knobs +15 -15 0 800 4.5k 10k50040012050 Level Equalizer Control Knobs Level Control Knob Equalizer Control knobs +15 -15 0 800 4.5k 10k50040012050 Level Equalizer Control Knobs Level Control Knob These knobs allow you to boost or cut the center frequency of 50, 120, 400, 500, 800, 4.5 k or 10 kHz within +/-15 dB. Level Control Knob This knob allows you to adjust the output level of the effect sound to minimize the level difference between the effect and direct sounds. MAKING THE CONNECTIONS AC Adaptor (PSA-Series ; Optional) Electric Bass Amplifier OUT 9V DC / 200mA *Inserting*Inserting *To prevent malfunction and/or damage to speakers or other devices, always turn down the volume, and turn off the power on all devices before making any connections. *If there are batteries in the unit while an AC adaptor is being used, normal operation will continue should the line voltage be interrupted (power blackout or power cord disconnection). *Once the connections have been completed, turn on power to your various devices in the order specified. By turning on devices in the wrong order, you risk causing malfunction and/or damage to speakers and other devices. When powering up: Turn on the power to your guitar amp last. When powering down: Turn off the power to your guitar amp first. *Always make sure to have the volume level turned down before switching on power. Even with the volume all the way down, you may still hear some sound when the power is switched on, but this is normal, and does not indicate a malfunction. *When operating on battery power only, the unit’s indicator will become dim when battery power gets too low. Replace the battery as soon as possible. *The CHECK indicator shows whether the effect is being applied or not. It does not indicate whether the power to the device is on or not. OPERATING THE UNIT OPERATING THE UNIT 4 1. When you have made the necessary connections, set the knobs as shown in the illustration. 2. Depress the pedal switch to turn the effect on. (Make sure that the CHECK Indicator lights.) 3. Adjust the tone using the relevant Equalizer Control Knobs. 4. Adjust the output level using the Level Control Knob, to minimize the level difference between the effect and direct sounds. CHANGING THE BATTERY CHANGING THE BATTERY Thumbscrew Spring Base Coil Spring Guide Bush Hole Pedal Battery Housing Battery Snap Cord Battery Snap 9V Battery 1. Loosen the thumbscrew at the front of the pedal, then lift the pedal upwards to open the unit. * The thumbscrew can be left in the pedal while changing the battery. 2. Remove...