Bugera 1990 Owner's manual

Brand: Bugera

Model: 1990

Category: Supplementary music equipment

Type: Owner's manual

Bugera 1990 is a 120-watt valve amplifier head with two channels, comprehensive sound control, 2 integrated reverb effects, and an effect loop with volume control. Handcrafted with classic valve electronics and top-grade components, it delivers powerful, reliable sound for a variety of genres. The Clean channel offers pristine tones, while the Lead channel provides a wide range of gain for everything from blues to heavy rock. The built-in reverb adds depth and atmosphere to your sound, and the effects loop allows for seamless integration of external effects pedals.

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User Manual

BUGERA 1990

Classic 120-Watt Hi-Gain Dual Reverb Valve Amplier Head

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2 BUGERA 1990 User Manual

Thank you

Congratulations! By purchasing the BUGERA 1990, you get a classic 100-Watt

valve amplier which stands out for its raw power, reliability and mind-blowing

“soul tone.” The 2-channel preamplier design including BUGERA ECC83/ECC83A

preamp valves for breathtaking punch and impressive gain. First-grade BUGERA

5881 power valves, comprehensive sound control, 2 integrated reverb eects and

an eect loop with volume control round o the BUGERA 1990.

BUGERA instrument ampliers are handmade under stringent production

guidelines to ensure long life and reliability. Each one includes our classic

valve electronics, hard-wearing switches and potentiometers, high-quality

transformers and, not to forget, our hand-selected, precision-matched BUGERA

valves. And, owing to their careful construction and component assembly,

theyare able to stand up to the toughest demands.

Table of Contents

Thank you .......................................................................2

Legal Disclaimer ............................................................. 3

Limited Warranty ........................................................... 3

Control elements ............................................................ 5

Front panel .................................................................................... 5

Rear panel ..................................................................................... 6

Footswitch .................................................................................... 7

Inside the BUGERA ..................................................................... 7

Wiring the BUGERA .................................................................... 8

Audio connections ..................................................................... 9

Specications ............................................................... 10

3 BUGERA 1990 User Manual

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LIMITED WARRANTY

LEGAL DISCLAIMER

Warning

Terminals marked with this symbol carry

electrical current of su cient magnitude

to constitute risk of electric shock. Use only high-quality

professional speaker cables with ¼" TS or twist-locking

plugs pre-installed. All other installation or modi cation

should be performed only by quali ed personnel.

Caution

High voltage! Risk of death! To avoid lethal

electric shock, do not open the casing.

There are no user-serviceable components inside. Referall

maintenance to quali ed service personnel. Remove the

mains cable when the unit is not in use.

Warning

To eliminate the risk of  re and electric

shock, do not expose this unit to rain or

moisture and splashing or dripping liquid, which might

enter the device. Do not place any objects  lled with

liquid, such as vases, on the unit.

This symbol, wherever it appears,

alertsyou to the presence of uninsulated

dangerous voltage inside the enclosure—

voltage that may be su cient to constitute a risk ofshock.

This symbol, wherever it appears,

alertsyou to important operating and

maintenance instructions in the

accompanying literature. Please read the manual.

1. Read these instructions.

2. Keep these instructions.

3. Heed all warnings.

4. Follow all instructions.

5. Do not use this apparatus near water.

6. Clean only with dry cloth.

7. Do not block any ventilation openings. Install in

accordance with the manufacturer’s instructions.

8. Do not install near any heat sources such as

radiators, heat registers, stoves, or other apparatus

(including ampli ers) that produce heat.

9. Do not defeat the safety purpose of the polarized

or grounding-type plug. A polarized plug has two blades

with one wider than the other. A grounding type plug

has two blades and a third grounding prong. The wide

blade or the third prong are provided for your safety. Ifthe

provided plug does not  t into your outlet, consultan

electrician for replacement of the obsoleteoutlet.

10. Protect the power cord from being walked on or

pinched particularly at plugs, convenience receptacles,

and the point where they exit from the apparatus.

11. Only use attachments/accessories speci ed by

themanufacturer.

12. Use only with the

cart, stand, tripod, bracket,

or table speci ed by the

manufacturer, orsold with

the apparatus. When a cart

is used, use caution when

moving the cart/apparatus

combination to avoid

injury from tip-over.

13. Unplug this apparatus during lightning storms or

when unused for long periods oftime.

14. Refer all servicing to quali ed service personnel.

Servicing is required when the apparatus has been

damaged in any way, such as power supply cord or plug

is damaged, liquid has been spilled or objects have fallen

into the apparatus, the apparatus has been exposed

to rain or moisture, does not operate normally, or has

beendropped.

15. The apparatus shall be connected to a MAINS socket

outlet with a protective earthing connection.

16. Where the MAINS plug or an appliance coupler is

used as the disconnect device, the disconnect device shall

remain readilyoperable.

17. CAUTION! - These service instructions are for use by

quali ed service personnel only. To reduce the risk of

electric shock do not perform any servicing other than

that contained in the operation instructions unless you are

quali ed to do so.

TECHNICAL SPECIFICATIONS AND APPEARANCES

ARE SUBJECT TO CHANGE WITHOUT NOTICE AND

ACCURACY IS NOT GUARANTEED. BEHRINGER,

KLARKTEKNIK, MIDAS, BUGERA, AND TURBOSOUND

ARE PART OF THE MUSIC GROUP MUSICGROUP.COM.

ALL TRADEMARKS ARE THE PROPERTY OF THEIR

RESPECTIVE OWNERS. MUSICGROUP ACCEPTS NO

LIABILITY FOR ANY LOSS WHICH MAY BE SUFFERED

BY ANY PERSON WHO RELIES EITHER WHOLLY OR

IN PART UPON ANY DESCRIPTION, PHOTOGRAPH

OR STATEMENT CONTAINED HEREIN. COLORS AND

SPECIFICATIONS MAY VARY FROM ACTUAL PRODUCT.

MUSIC GROUP PRODUCTS ARE SOLD THROUGH

AUTHORIZED FULLFILLERS AND RESELLERS ONLY.

FULLFILLERSAND RESELLERS ARE NOT AGENTS OF

MUSICGROUP AND HAVE ABSOLUTELY NO AUTHORITY

TO BIND MUSICGROUP BY ANY EXPRESS OR IMPLIED

UNDERTAKING OR REPRESENTATION. THIS MANUAL

IS COPYRIGHTED. NO PART OF THIS MANUAL MAY

BE REPRODUCED OR TRANSMITTED IN ANY FORM

OR BY ANY MEANS, ELECTRONIC OR MECHANICAL,

INCLUDING PHOTOCOPYING AND RECORDING OF ANY

KIND, FOR ANY PURPOSE, WITHOUT THE EXPRESS

WRITTEN PERMISSION OF MUSICGROUPIPLTD.

Trident Chambers, Wickhams Cay, P.O. Box 146,

Road Town, Tortola, British Virgin Islands

For the applicable warranty terms and conditions

and additional information regarding MUSIC Group’s

Limited Warranty, please see complete details online at

www.music-group.com/warranty.

Important Safety

Instructions

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4 BUGERA 1990 User Manual

IMPORTANT NOTICE

Failure to observe the following points

may result in damage to the amplier or

loudspeakers. Damage caused in such a

way are not covered by warranty.

• Observe the correct impedance for your loudspeaker

and use the appropriate output socket.

• Always use loudspeaker cables for connection

between the amplier and the loudspeaker. Never

use other types of cable such as instrument cable and

microphone cable.

Before you get started

Your product was carefully packed at the factory

to ensure safe transport. Nevertheless, if the box

is damaged inspect the unit immediately for signs

ofdamage.

• If the unit is damaged please do NOT return it to us,

but notify your dealer and the shipping company

immediately, otherwise, claims for damage or

replacement may not be granted.

• Always use the original box to prevent damage

during storage or transport.

• Make sure that children cannot play unsupervised

with the unit or its packaging.

• Please ensure proper disposal of all

packingmaterials.

• Ensure adequate air supply and to avoid overheating

do not place the unit near radiators etc.

• Please make sure that all devices are properly

grounded. For your own safety, never remove or

disable the ground conductors from the devices

or on the power cords. The unit must always be

connected to the mains outlet with a protective

groundingconnection.

Important notes concerning

installation

• The sound quality may diminish within the range of

powerful broadcasting stations and high-frequency

sources. Increase the distance between the

transmitter and the device and use shielded cables

forallconnections.

5 BUGERA 1990 User Manual

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Front panel

(1) The POWER switch is used to turn the power of the BUGERA amplier on

ando.

(2) The STANDBY switch allows you to place the amp in STANDBY mode

(OFFposition). This way the amp is idle, but the operational temperature of

the valves is maintained (POWER switch turned on). When the switch is set

to its ON position the amplier is activated.

 ATTENTION!

TO AVOID DAMAGE TO YOUR AMP, NEVER USE THE BUGERA VALVE

AMPLIFIER WITHOUT A LOUDSPEAKER CONNECTED!

(3) The CHANNEL push button switches between the CLEAN and the

LEADchannel.

◊ You can also activate both channels with the supplied footswitch.

Refer to “Footswitch” for details.

(4) This is the VOLUME control that lets you adjust the volume level of the

LEADchannel.

(5) This REVERB rotary knob adjusts the eect level of the built-in REVERB

in the LEAD channel. The provided footswitch activates the REVERB eect

(seeChapter “Footswitch”).

(6) This is the VOLUME control that lets you adjust the volume level of the

CLEAN channel.

(7) This REVERB rotary knob adjusts the eect level of the built-in REVERB in

the CLEAN channel. The provided footswitch activates the REVERB eect

(seeChapter “Footswitch”).

(8) The PRESENCE rotary knob changes the tone of the amplier in the upper

frequencies. This emphasizes the high end and makes the sound crisper.

(9) The passive TREBLE control adjusts the upper frequency range.

(10) The passive MID control adjusts the middle frequency range.

(11) The passive BASS control adjusts the lower frequency range.

(12) This GAIN control species the input level of the LEAD channel. Turn the

control to the right to increase the preamplier’s distortion and sustain.

(13) This GAIN rotary knob adjusts the input level of the CLEAN channel.

Turningthe knob to the right increases the level of the preamplier and,

therefore, the signal’s strength.

(14) The jack labeled INPUT is the ¼" input connector on the BUGERA for hooking

up your guitar. Use a commercially available ¼" mono cable.

Control elements

Front panel of the BUGERA 1990

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11) (12) (13) (14)

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6 BUGERA 1990 User Manual

Rear panel of the BUGERA 1960

(15) (16) (17) (18) (19) (20) (21) (22) (23) (24) (25)

(26)

Rear panel

 CAUTION!

Hot! Risk of injury! During use, the valves get very hot and high surface

temperatures may be reached at the rear of this unit. Avoid touching

the controls and connectors on the rear panel during use. To avoid

accidental contact with hot surfaces, place the rear panel so that it

faces a wall.

(15) The FOOTSW(itch) jack is used to connect to the provided footswitch.

Pleasemake sure that a cable has been connected before turning on the

amplier. For more information, read Chapter “Footswitch.”

(16) The LEVEL rotary knob adjusts the output level of the signal sent to an

external eects unit or any other signal processor (0 – 10). Turning the knob

to the right increases the signal level, whereas turning it to the left decreases

the signal level. In order to produce sound with the least possible noise,

wesuggest using a high setting without distorting the signal.

(17) The SEND output is used to connect a shielded ¼" mono jack cable to the

input of an external eects unit.

(18) The RETURN input is used to connect a shielded ¼" mono jack cable to the

output of an external eects unit.

(19) The RECORDING output is used to connect directly to a recording device or

a PA system. This signal is specially ltered to provide the optimum signal

quality for this application.

(20) The DIRECT output is used to route the amplier’s unltered preamp signal,

for example, to a second amplier and loudspeaker system by retaining the

original sound.

(21) The IMPEDANCE switch lets you specify the loudspeaker impedance.

Alwaysapply the value that is identical to the impedance of the used

speakercabinet. Please also read “Wiring the BUGERA“.



(22) Both the paralleled LOUDSPEAKER outputs (¼" mono jacks) are used

to connect the speaker cabinet(s). The minimum impedance is 4 Ohms.

TheIMPEDANCE switch should always be set to match the impedance of the

used speaker cabinet.

 ATTENTION!

TO AVOID DAMAGE TO YOUR AMP, NEVER USE THE BUGERA VALVE

AMPLIFIER WITHOUT A LOUDSPEAKER CONNECTED!



(23) This POWER switch reduces the output power of the amplier. In 50 W

mode, the amplier switches to triode operation, reducing the output power

by half (from 100 W to approx. 50 W). In 100 W mode, the amplier runs at

full power in pentode operation (100 W).



(24) WARNING: ONLY REPLACE THE FUSE WHEN THE MAINS CABLE HAS BEEN

DISCONNECTED! The FUSE is found in the fuse holder. If the fuse is

blown, itneeds to be replaced with a fuse of the same kind by all means.

Otherwise,the unit could seriously be damaged, in which case the warranty

is void. If the fuse is blown repeatedly, you should take the unit to a qualied

service technician.



(25) The IEC MAINS connector is used to connect the mains cable that has

the appropriate voltage ratings for your country (included). At all times,

makethe connections to the amplier before plugging the cable into a

power outlet.

(26) This is the SERIAL NUMBER of the amplier.

7 BUGERA 1990 User Manual

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Footswitch

(27) The CLEAN switch activates the CLEAN channel.

(28) The LEAD switch activates the LEAD channel.

Inside the BUGERA

DANGER!

High voltage! Risk of death!

High voltages of up to 500 V DC may be present inside the casing for

long periods after being disconnected from the mains. To avoid lethal

electric shock, do not open the casing. There are no user-serviceable

components inside. Refer all maintenance to qualied service

personnel. Remove the mains cable when the unit is not in use.

Inside the BUGERA 1990

(27) (28)

(30)(31)(32)

(29)



The parts inside the amplier operate at high voltages and high

temperatures. To avoid damage and injury that results from re or

electric shock, do not drop or spill anything into the unit’scasing.

INSTRUCTIONS FOR QUALIFIED SERVICE

PERSONNELONLY

Remove the backside of the amplier’s casing to get to the valves and the

controlelements.

(29) These are the sockets for the ECC38/ECC38A preamp valves.

(30) These are the sockets for the 5881 power amp valves.



(31) The BIAS TEST connector lets you connect a voltmeter in order to measure

the power amp valves (bias adjustment). Make sure that the voltmeter is set

to direct current (DC).

(32) The BIAS ADJUST control is used to make the bias-adjustment.

◊ Replacing the power amp valves also requires bias adjustment.

You should always use sets of four matched valves. The valves of the

BUGERA Series are ideal for this purpose.

 CAUTION:

WE HIGHLY RECOMMEND THAT BIAS ADJUSTMENTS BE CARRIED OUT BY

QUALIFIED PERSONNEL!

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8 BUGERA 1990 User Manual

Wiring the BUGERA

 CAUTION!

Hot! Risk of injury! During use, the valves will get very hot and high

surface temperatures may be reached at the rear of this unit. To avoid

burning yourself, make all connections while the unit is still cold.

 ATTENTION!

TO AVOID DAMAGE TO YOUR AMP, NEVER USE THE BUGERA VALVE

AMPLIFIER WITHOUT A LOUDSPEAKER CONNECTED!

The BUGERA amplier has two paralleled LOUDSPEAKER outputs which are used

to connect one or two speaker cabinets.

If you only connect one speaker cabinet, be sure that the IMPEDANCE switch is set

to match the impedance of the connected cabinet.

If you want to connect two speaker cabinets, both cabinets should have to the

same impedance. Be sure to have set the IMPEDANCE switch correctly. In this

case, set it to half the value of one of the cabinets. When using two 16-Ohm

cabinets, the switch therefore needs to be set to 8 Ohms; and with two 8-Ohm

cabinets, set it to the minimum impedance of 4 Ohms.

When you use two speaker boxes with diering impedance values, the speaker

with the lower impedance will provide the highest output power. In this case the

IMPEDANCE switch must be set to half the value of the speaker with the lower

impedance value. Example: 16 ohms + 8 ohms -> 4 ohms.

Impedances

Connecting a speaker

✓

Speaker cabinets

1 x 16 Ω

1 x 8 Ω

1 x 4 Ω

2 x 16 Ω

2 x 8 Ω

16 Ω 8 Ω 4 Ω

IMPEDANCE switch

BUGERA 1990

Speaker cabinet BUGERA 412H-BK

Loudspeaker

output

9 BUGERA 1990 User Manual

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The following gure shows a setup with an external eects unit connected via

the FX LOOP. What’s more, the RECORDING output is connected to a mixer’s line

channel to feed the signal to a recording device. The speaker signal of the

connected loudspeaker is picked up by a microphone and is fed to the mixer via a

mic input. This way you get a second guitar signal that is amplied over a

PAsystem or can be recorded additionally or both.

Set-up for live playing

Audio connections

The inputs and outputs of the BUGERA amplier use mono jack connectors.

¼" mono jack connector

PA loudspeaker

Power amplier

Main Out

Multitrack recorder

Eects processor

Instrument input

Microphone

Electric guitar

Recording out

Mixing console

Send Return

strain relief clamp

sleeve

tip

sleeve

(ground/shield)

Unbalanced ¼" TS connector

tip

(signal)

bugera-amps.com

10 BUGERA 1990 User Manual

Specications

Preamp Section

Valves

Type 2 x ECC83A

1 x ECC83

Instrument Input

Impedance 1 MΩ

Clean Channel

Nominal input level –10 dBV

Minimum input level –50 dBV

Maximum input level 0 dBV

Lead Channel

Nominal input level –80 dBV

Minimum input level –92 dBV

Effects Send

Impedance 15 kΩ

Nominal output level –12 to 0 dBV

Effects Return

Impedance 15 kΩ

Minimum input sensitivity –12 to 0 dBV

Recording Output

Impedance 47 kΩ

Nominal output level +0 dBV

Direct Output

Impedance 10 kΩ

Nominal output level +3 dBV

Power Amplier Section

Valves

Type 4 x 5881

Output Power

Peak power 60 W/120 W switchable / 16, 8, 4 Ω

Loudspeaker Connectors

Type ¼" TS connectors, unbalanced

Load impedance 4 Ω / 8 Ω / 16 Ω switchable

Power Supply

Power Consumption Maximum 350 W

Mains Voltage / Fuse

100 – 120 V~, 50/60 Hz T 3.15 A H 250 V

220 – 230 V~, 50/60 Hz T 1.6 A H 250 V

Mains Connector Standard IEC receptacle

Dimensions/Weight

Dimensions (H x W x D) 12.2 x 27.2 x 9.6"

310 x 690 x 245 mm

Weight 49.6 lbs / 22.5 kg

We are constantly striving to maintain the highest professional standards. As a result of these efforts,

modifications may be made from time to time to existing products without prior notice. Specifications and

appearance may differ from those listed or illustrated.

11 BUGERA 1990 User Manual

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FEDERAL COMMUNICATIONS

COMMISSION COMPLIANCE

INFORMATION

Responsible Party Name: MUSIC Group Services US Inc.

Address: 18912 North Creek Parkway,

Suite 200 Bothell, WA 98011,

USA

Phone/Fax No.: Phone: +1 425 672 0816

Fax: +1 425 673 7647

BUGERA 1990

complies with the FCC rules as mentioned in the followingparagraph:

This equipment has been tested and found to comply with the limits for a ClassB

digital device, pursuant to part 15 of the FCC Rules. These limits are designed

to provide reasonable protection against harmful interference in a residential

installation. This equipment generates, uses and can radiate radio frequency

energy and, if not installed and used in accordance with the instructions, may cause

harmful interference to radio communications. However, there is no guarantee that

interference will not occur in a particular installation. If this equipment does cause

harmful interference to radio or television reception, which can be determined

by turning the equipment o 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 dierent from that to which the

receiver is connected.

• Consult the dealer or an experienced radio/TV technician forhelp.

This device complies with Part 15 of the FCC rules. Operation is subject to the

following two conditions:

(1) this device may not cause harmful interference, and

(2) this device must accept any interference received, including interference that may

cause undesired operation.

Important information:

Changes or modications to the equipment not expressly approved by MUSIC Group

can void the user’s authority to use the equipment.

BUGERA 1990

BUGERA

Bugera 1990 Owner's manual

Brand: Bugera

Model: 1990

Category: Supplementary music equipment

Type: Owner's manual

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Bugera 1990 Owner's manual

Bugera 1990 Owner's manual

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