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Boss EQ-20 Advanced EQ, Owner'S Manual, Page: 23 / 28

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Boss EQ-20 Advanced EQ Owner'S Manual Download Page 23

 

23

 

If You Think There’s a Problem

 

The power doesn’t come on.

 

❍

 

Is the specified AC adaptor (PSA-series, 

sold separately) connected correctly?

 

➔

 

Check the connections again (p. 5–6).

 

❍

Have the batteries run down?

➔

Replace with fresh batteries (p. 4).

❍

Is the guitar connected correctly to the 

INPUT jack?

➔

Check the connections again (p. 5–6).

* When running off batteries, the unit won’t switch 

on unless there’s something plugged into the 
INPUT jack. This helps conserve the batteries.

The settings for “MANUAL” 
are not stored in memory.

❍

Is the MEMORY indicator lit up?

➔

If the MANUAL indicator is not lit up (and 
the unit is not set to “MANUAL”), then 
settings are not stored in memory even if 
you carry out a write operation. Get the 
MANUAL indicator to light up, then carry 
out the write procedure again (p. 10).

The contents of memory 
cannot be overwritten.

❍

Is the MANUAL indicator lit up?

➔

Change settings and store them in memory 
when the MEMORY indicator is lit up (and 
the unit is set to “MEMORY”) (p. 12).

There is no sound/volume is 
too low.

❍

Is the other equipment connected correctly?

➔

Check the connections again (p. 5–6).

❍

Is the volume turned down on the 

connected guitar amp, effects 

processor, or other device?

➔

Check the settings on the connected 
equipment (p. 5–6).

❍

Is the LEVEL slider on the EQ-20 lowered?

➔

Operate the LEVEL slider to adjust the 
volume (p. 8).

❍

Is the LEVEL switch on the rear panel 

set correctly?

➔

Set the LEVEL switch to match the 
connected equipment (p. 5–6).

Sound is distorted.

❍

Have the batteries run down?

➔

When the batteries run down, the POWER 
indicator goes out and the unit may not 
operate correctly. Replace with fresh 
batteries (p. 4).

❍

Is the volume of the input sound too high?

➔

Be careful of the volume level when using 
the EQ-20 after a distortion effect or when 
the EQ-20 is connected to send or return 
on a guitar amp.

❍

Is the LEVEL switch on the rear panel 

set correctly?

➔

Set the LEVEL switch to match the 
connected equipment (p. 5–6).

The backlit does not light up.

❍

Is the MANUAL indicator lit?

➔

When the MANUAL indicator is lit (when 
set to “MANUAL”), the backlit does not 
light up even when you operate the 
equalizer sliders or the LEVEL slider.

Summary of Contents for EQ-20 Advanced EQ

Page 1: ...sion of BOSS CORPORATION Main Features This is a 10 band graphic equalizer that lets you vary levels by 15 dB from 30 Hz to 12 kHz You can use pedal operations to switch between MANUAL which offers equalization based on the positions of the controls and MEMORY which can store nine different equalization setups in memory The superior functionality of the unit really becomes evident at those times w...

Page 2: ...other devices This way you can prevent malfunction and or damage to speakers or other devices 306b Batteries are supplied with the unit The life of these batteries may be limited however since their primary purpose was to enable testing 307 Before connecting this unit to other devices turn off the power to all units This will help prevent malfunctions and or damage to speakers or other devices Pla...

Page 3: ...tely it may be impossible to restore the contents of data that was stored in the unit s memory once it has been lost Roland Corporation assumes no liability concerning such loss of data 553 Use a reasonable amount of care when using the unit s buttons sliders or other controls and when using its jacks and connectors Rough handling can lead to malfunctions 554 Never strike or apply strong pressure ...

Page 4: ...teries When replacing the batteries use six AA type Since the EQ 20 s current consumption is relatively high we recommend the use of alkaline batteries Do not mix fresh batteries with used ones or mix batteries of different types Doing so can result in fluid leakage Battery life can vary depending on battery type Continuous usage time under battery power is about 12 hours with alkaline batteries a...

Page 5: ...observe the following order when switching on the power to your equipment 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 or the like last When powering down Turn off the power to your guitar amp or the like first Always make sure to have the volume level turned down before switc...

Page 6: ...l setting on the unit If the PEAK indicator lights up frequently turn down the output on the guitar amp When the guitar amp s SEND RETURN pedal is at 4 dBu set the LEVEL switch on the rear panel of the unit to 4 dBu Connecting to an MTR or Mixer fig 03 Guitar Amplifier RETURN SEND Electric Guitar AC Adaptor PSA series option Mixer MTR Electric Guitar Electric Bass or AC Adaptor PSA series option ...

Page 7: ...ORY Memory Number Each press of the EFFECT ON OFF pedal switches effects on or off When effects are off the sound coming in through the INPUT jack is output unchanged Each press of the MANUAL MEMORY pedal switches the unit between MANUAL and MEMORY This lights up when set to MANUAL This lights up when effects are on This lights up when set to MEMORY ...

Page 8: ... down the volume on all equipment to prevent malfunction or speaker damage When set to MANUAL the backlit does not light up even when the equalizer sliders the LEVEL slider or the EFFECT ON OFF pedal are operated LEVEL Slider This corrects differences in level when effects are on or off PEAK Indicator Equalizer Sliders The sliders 30 60 120 200 400 800 1 6 k 3 2 k 6 4 k and 12 8 k Hz adjust the so...

Page 9: ...a memory location 1 through 9 Holding down the button makes the memory number change automatically When the unit is shipped from the factory equalization settings are stored in memories 1 through 9 For information about the settings refer to Factory Default Settings p 17 ...

Page 10: ...r is lighted in the MANUAL mode Do not switch off the power while a write operation is in progress 1 While at MANUAL adjust the equalizer sliders and the level slider to obtain the desired equalization fig 08 2 Press the LIGHT button and the SELECT button at the same time fig 09 The text WRITE SURE flashes in the display and the unit enters write standby fig 10 To cancel the write operation press ...

Page 11: ...ton and the SELECT button at the same time OK appears in the display and the write operation finishes fig 12 fig 13 From step 2 and after you cannot adjust the sound quality or volume level by moving the sliders If you want to change what is in memory refer to Changing What Is in Memory Before Storing p 12 If you want to return the settings to the factory defaults refer to Returning Settings to Th...

Page 12: ...utton to choose the number of the memory you want to change Holding down the SELECT button makes the memory number change automatically fig 15 3 Operate the equalizer sliders or the level slider to change the equalization The display shows the positions of the sliders stored in memory When you operate the sliders the present positions settings flash until they match the setup stored in memory Illu...

Page 13: ...lay and the unit enters write standby To cancel the write operation press the MANUAL MEMORY pedal If only the SELECT button is pressed the display changes to show the contents of the next memory number and the changes made in change 3 are canceled 5 Press the SELECT button to choose the number of the memory 1 through 9 to store the settings 6 Again press the LIGHT button and the SELECT button at t...

Page 14: ...about 20 seconds after you stop operation This is a feature that helps save battery power If you want it illuminated constantly press the LIGHT button to make it light up Please be aware that the batteries may run down faster than normal Equalizer Sliders Provide for adjustment at 30 Hz 60 Hz 120 Hz 200 Hz 400 Hz 800 Hz 1 6 kHz 3 2 kHz 6 4 kHz and 12 8 kHz within a range of plus or minus 15 dB EFF...

Page 15: ...d separately Using an AC adaptor makes possible long performances with no worry about batteries going dead INPUT Jack This is the input jack for connecting to the output of an electric guitar bass or other instrument or effects processor The INPUT jack also doubles as the power switch when the unit is running on battery power The power comes on when a plug is inserted into the INPUT jack and goes ...

Page 16: ... the AC ADAPTOR jack 2 While holding down the LIGHT button and the SELECT button switch on the power When running on battery power Insert the connection plug into the INPUT jack When running on power from an AC adaptor Insert the AC adaptor plug into the AC ADAPTOR jack When you release the button REST appears on the display fig 21 To cancel the operation press the LIGHT button the SELECT button o...

Page 17: ... 1 Guitar Clean Cutting NUMBER 2 Mid Boost for the Lead NUMBER 3 Slash Metal EQ 20 Electric Guitar Guitar Amp CLEAN EQ 20 OverDrive Distortion Guitar Amplifier Electric Guitar OverDrive Distortion EQ 20 Guitar Amplifier Electric Guitar ...

Page 18: ...18 Factory Default Settings NUMBER 4 Acoustic NUMBER 5 Jazz Guitar NUMBER 6 Enhancer NUMBER 7 For Slap Bass NUMBER 8 For Standard Rock for Bass NUMBER 9 Metal for Bass ...

Page 19: ...19 Frequency Response fig 23 LEVEL dB 15 0 15 30 60 120 200 400 800 1 6k 3 2k 6 4k 12 8k FREQUENCY Hz ...

Page 20: ...ings Settings for Guitar Booster connection order EQ 20 OverDrive Distortion Crunch Sound connection order OverDrive Distortion EQ 20 Pickup Simulation Single coil Humbacking Pickup Simulation Humbacking Single coil ...

Page 21: ...21 Sample Settings Settings for Bass Mid Booster Fat Sound Booster using the overdrive of the bass amplifier Tight Sound ...

Page 22: ...tor serves also as battery check indicator EFFECT ON OFF Indicator MANUAL Indicator MEMORY Indicator PEAK Indicator Connectors INPUT Jack OUTPUT Jack AC Adaptor Jack Power DC 9V Dry battery AA type x 6 AC Adaptor Power Consumption 120 mA 9 V Expected battery life under continuous use Carbon 3 5 hours Alkaline 12 hours These figures will vary depending on the actual conditions of use Dimensions 173...

Page 23: ... to MEMORY p 12 There is no sound volume is too low Istheotherequipmentconnectedcorrectly Check the connections again p 5 6 Is the volume turned down on the connected guitar amp effects processor or other device Check the settings on the connected equipment p 5 6 Is the LEVEL slider on the EQ 20 lowered Operate the LEVEL slider to adjust the volume p 8 Is the LEVEL switch on the rear panel set cor...

Page 24: ...ructions intended to alert the user to the risk of injury or material damage should the unit be used improperly Material damage refers to damage or other adverse effects caused with respect to the home and all its furnishings as well to domestic animals or pets Used for instructions intended to alert the user to the risk of death or severe injury should the unit be used improperly The symbol alert...

Page 25: ...remove the AC adaptor from the outlet and request servicing by your retailer the nearest Roland Service Center or an authorized Roland distributor as listed on the Infor mation page when The AC adaptor or the power supply cord has been damaged or Objects have fallen into or liquid has been spilled onto the unit or The unit has been exposed to rain or otherwise has become wet or The unit does not a...

Page 26: ...ly batteries may explode or leak and cause damage or injury In the interest of safety please read and observe the following precautions p 4 1 Carefully follow the installation instructions for batteries and make sure you observe the correct polarity 2 Avoid using new batteries together with used ones In addition avoid mixing different types of batteries 3 Remove the batteries whenever the unit is ...

Page 27: ...g the equipment off and on the user is encouraged to try to correct the interference by one or more of the following measures Reorient or relocate the receiving antenna Increase the separation between the equipment and receiver Connect the equipment into an outlet on a circuit different from that to which the receiver is connected Consult the dealer or an experienced radio TV technician for help U...

Page 28: ...G6017291 ...

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