Bugera G20 INFINIUM 20 Watt Class A Tube Amplifier Head User Guide

: June 16, 2024
: Bugera

Table of Contents

Bugera G20 INFINIUM 20 Watt Class A Tube Amplifier Head
Product Usage Instructions
Maintenance
Important Safety Instructions
LIMITED WARRANTY
IMPORTANT NOTICE
Bugera INFINIUM Valve Life Monitoring
Specifications
Other important information
FCC
FAQ
References
Read User Manual Online (PDF format)
Download This Manual (PDF format)

Bugera G20 INFINIUM 20 Watt Class A Tube Amplifier Head

Bugera-G20-INFINIUM-20-Watt-Class-A-Tube-Amplifier-Head-
PRODCUT

Specifications

Model: G20 INFINIUM
Power: 20 Watts
Amplifier Type: Class-A Tube
Features: INFINIUM Tube Life Multiplier, MORPH EQ, Reverb
Version : 5.0

Important Safety Instructions
This product comes with important safety instructions that must be followed to ensure safe operation:

Read these instructions.
Keep these instructions.
Heed all warnings.
Follow all instructions.
Do not use this apparatus near water.
Clean only with a dry cloth.
Do not block any ventilation openings. Install under the manufacturer’s instructions.
Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat.
Do not defeat the safety purpose of the polarized or grounding-type plug.
Protect the power cord from being walked on or pinched.
Use only attachments/accessories specified by the manufacturer.
Use only with the cart, stand, tripod, bracket, or table specified by the manufacturer, or solder with the apparatus.
Unplug this apparatus during lightning storms or when unused for long periods.
Refer all services to qualified service personnel.
The apparatus shall be connected to a MAINS socket outlet with a protective earthing connection.
Where the MAINS plug or an appliance coupler is used as the disconnect device, the disconnect device shall remain readily operable.
Do not install in a confined space, such as a bookcase or similar unit.

Product Usage Instructions

Installation

Follow these steps to install the G20 INFINIUM:

Choose a suitable location for the amplifier head.
Ensure proper ventilation by not blocking any ventilation openings.
Connect the power cord to a suitable power outlet with a protective earthing connection.
If necessary, connect the amplifier head to a cart, stand, tripod, bracket, or table specified by the manufacturer.

Operation
To operate the G20 INFINIUM:

Ensure the amplifier head is properly installed and connected to a power source.
Turn on the amplifier using the designated power switch.
Adjust the volume, tone, and other settings as desired using the available controls.
Connect your instrument or audio source to the appropriate input on the amplifier.
Play your instrument or audio source and adjust the settings for optimal sound.

Maintenance

To maintain the G20 INFINIUM:

Regularly clean the amplifier with a dry cloth to remove dust and debris.
Avoid exposing the amplifier to rain, moisture, or liquids.
Do not attempt to open or repair the amplifier yourself. Refer all services to qualified service personnel.

Important Safety Instructions

CAUTION: RISK OF ELECTRIC SHOCK!
DO NOT OPEN!

CAUTION: Terminals marked with this symbol carry an electrical current of sufficient magnitude to constitute a risk of electric shock.
Use only high-quality professional speaker cables with ¼” TS or twist-locking plugs pre-installed. All other installations or modifications should be performed only by qualified personnel.
CAUTION: This symbol, wherever it appears, alerts you to the presence of uninsulated dangerous voltage inside the enclosure – voltage that may be sufficient to constitute a risk of shock.
WARNING: This symbol, wherever it appears, alerts you to important operating and maintenance instructions in the accompanying literature. Please read the manual.
Caution: To reduce the risk of electric shock, do not remove the top cover (or the rear section). No user-serviceable parts inside. Refer servicing to qualified personnel.
Caution: To reduce the risk of fire or electric shock, do not expose this appliance to rain and moisture. The apparatus shall not be exposed to dripping or splashing liquids and no objects filled with liquids, such as vases, shall be placed on the apparatus.
Caution: These service instructions are for use by qualified service personnel only.
To reduce the risk of electric shock do not perform any servicing other than that contained in the operation instructions. Repairs have to be performed by qualified service personnel.

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 a dry cloth.
7. Do not block any ventilation openings. Install per the manufacturer’s instructions.
8. Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat.
9. Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two blades one wider than the other. A grounding-type plug has two blades and a third grounding prong. The wide blade or the third prong is provided for your safety. If the provided plug does not fit into your outlet, consult an electrician for the 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. Use only attachments/accessories specified by

the manufacturer.

12. Use only with the cart, stand, tripod, bracket, or table specified 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.
14. Refer all servicing to qualified 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. Correct disposal of this product: This symbol indicates that this product must not be disposed of with household waste, according to the WEEE Directive (2012/19/EU) and your national law. This product should be taken to a collection center licensed for the recycling of waste electrical and electronic equipment (EEE). The mishandling of this type of waste could have a possible negative impact on the environment and human health due to potentially hazardous substances that are generally associated with EEE. At the same time, your cooperation in the correct disposal of this product will contribute to the efficient use of natural resources.

For more information about where you can take your waste equipment for recycling, please contact your local city office or your household waste collection service.

18. Do not install in a confined space, such as a bookcase or similar unit.
19. Do not place naked flame sources, such as lighted candles, on the apparatus.
20. Please keep the environmental aspects of battery disposal in mind. Batteries must be disposed of at a battery collection point.
21. This apparatus may be used in tropical and moderate climates up to 45°C.

LEGAL DISCLAIMER
Music Tribe accepts no liability for any loss that may be suffered by any person who relies either wholly or in part upon any description, photograph, or statement contained herein. Technical specifications, appearances, and other information are subject to change without notice. All trademarks are the property of their respective owners. Midas, Klark Teknik, Lab Gruppen, Lake, Tannoy, Turbosound, TC Electronic, TC Helicon, Behringer, Bugera, Aston Microphones, and Coolaudio are trademarks or registered trademarks of Music Tribe Global Brands Ltd. © Music Tribe Global Brands Ltd. 2023 All rights reserved.

LIMITED WARRANTY

For the applicable warranty terms and conditions and additional information regarding Music Tribe’s Limited Warranty, please see complete details online at community.musictribe.com/pages/support#warranty.

IMPORTANT NOTICE

WARNING: Failure to observe the following points may result in damage to the amplifier 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.
D Always use loudspeaker cables for connection between the amplifier 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 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.

G20 INFINIUM Hook-up
Step 1: Hook-Up

Bugera-G20-INFINIUM-20-Watt-Class-A-Tube-Amplifier-Head-
FIG-1

G20 INFINIUM Controls

Step 2: Controls

The POWER switch turns the amp on and off. The jewel lamp lights when power is on and flashes to indicate an error. See Infinium advice for details.
STANDBY switch mutes the amp’s output and preserves your amp’s power tube. Put the amp into STANDBY mode when you are practicing via headphones rather than via speaker cabinet.
The MASTER knob controls the amp’s overall output.
REVERB knob adjusts the amount of reverb effect.
MORPH knob blends the tonal character of the overdrive channel from an American style to a British flavor. The effect of this knob is more subtle when the MIDDLE knob is at the center 12:00 position, and more pronounced with the MIDDLE set very high or very low.
EQ knobs adjust the low, middle, and high frequencies of the guitar tone.
OVERDRIVE VOLUME knob adjusts the volume level of the overdrive channel.
The GAIN knob adjusts the amount of distortion on the overdrive channel.
The CHANNEL button switches between the clean and overdrive channels.
The TONE knob adjusts the brightness of the
clean channel.
CLEAN VOLUME knob adjusts the volume level of the clean channel.
INPUT – connect your guitar to this jack.
LINE input allows the connection of external audio sources for jamming and practicing purposes.
EFFECTS LOOP SEND and RETURN jacks allow connection of effects devices. Use the LEVEL button to select +4 dB for use with rack effect processors, or the 10 dB setting for use with stompbox effects.
FOOTSWITCH input allows connection of the included footswitch.
EMULATED OUTPUT jack allows the connection of headphones or a line out for recording. The signal emulates the sound of either a 1×12 or 4×12 cabinet, selectable via the adjacent button. This output works even when the amp is in Standby.
SPEAKER IMPEDANCE switch selects between 4, 8, and 16 Ohms.
AMPLIFIER OUTPUT jack allows the connection of a speaker cabinet. Always use a speaker cable for this connection!
INFINIUM LEDs will light when the power tubes need to be replaced. The power section can accept EL34 or 6L6 tubes, and the stock ECC83A preamp tubes can be replaced with other variations.
IEC SOCKET accepts the included power cable.

Bugera-G20-INFINIUM-20-Watt-Class-A-Tube-Amplifier-Head-
FIG-2

Bugera INFINIUM Valve Life Monitoring

The INFINIUM Tube Life Monitoring circuitry continuously monitors the output tube biasing for optimum performance and consistent tone, even as the tube ages. When the output tube does need to be replaced, the tube’s matching LED on the back panel will light permanently. When you do need to replace a tube, you may plug in the new tube and immediately begin using the amplifier; you will not need a technician to set up the bias for the new tube.

To replace a faulty output tube:

Switch off the amplifier and wait for the output tube to cool down to a safe temperature before touching it.
Press down the tube retainer to the chassis using two fingers of one hand, and then gently pull on the tube while lightly rocking back and forth until the tube loosens and slides out of the socket.
Carefully insert the new tube, making sure the new tube’s prongs are properly aligned with the matching holes and the center coding pin is aligned with the corresponding notch in the Octal socket.
Gently push the new tube until it sits firmly in the socket.
Switch the amplifier back on in Standby mode.
When the tube has warmed up to operating temperature, you may switch the amplifier out of Standby mode.
The INFINIUM Tube Life Monitoring LED should now turn off and you can begin playing.

WARNING: When the front panel light starts flashing regularly, this indicates the amp cannot work due to too many issues. In this case we recommend replacing the faulty power amp tube immediately.

Specifications

Preamp Section

Tube type 2 x ECC83A
Input connector 1/4″ unbalanced TS
Input impedance 1 MΩ

Rear Panel

Effects send impedance 1 kΩ
Effects return impedance 41 kΩ
Effects loop sensitivity +4 dB / -10 dB
Stereo line input connector 1/4″ unbalanced TRS
Line input impedance 10 kΩ
Footswitch input (FSB102A), non-latching 1/4″ TRS
Stereo phones output 1/4″ TRS

Power Amplifier Section

Tube type 2 x EL34
Output power 20 W
Impedance switch 4, 8, 16 Ω
Loudspeaker connector 1/4″ TS

Power Supply

Power consumption @ 1/8 max power 120 W
Fuse 100-120 V T 2A H 250 V 220-230 V T 1A H 250 V
Mains connection Standard IEC receptacle

Physical

Dimensions (H x W x D) 240 x 468 x 231 mm (9.5 x 22.7 x 9.1″)
Weight 10.3 kg (22.7 lbs)

Other important information

Important information

Register online. Please register your new Music Tribe equipment right after you purchase it by visiting musictribe.com. Registering your purchase using our simple online form helps us to process your repair claims more quickly and efficiently. Also, read the terms and conditions of our warranty, if applicable.
Malfunction. Should your Music Tribe Authorized Reseller not be located in your vicinity, you may contact the Music Tribe Authorized Fulfiller for your country listed under “Support” at musictribe.com. Should your country not be listed, please check if your problem can be dealt with by our “Online Support” which may also be found under “Support” at musictribe.com. Alternatively, please submit an online warranty claim at musictribe.com BEFORE returning the product.
Power Connections. Before plugging the unit into a power socket, please make sure you are using the correct mains voltage for your particular model. Faulty fuses must be replaced with fuses of the same type and rating without exception.

FEDERAL COMMUNICATIONS COMMISSION COMPLIANCE INFORMATION

Bugera
G20 INFINIUM

Responsible Party Name: Music Tribe Commercial NV Inc.
Address : 122 E. 42nd St.1, 8th Floor NY, NY 10168, United States
Email Address: legal@musictribe.com

FCC

G20 INFINIUM
This equipment has been tested and found to comply with the limits for a Class B digital device, according 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 by 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 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 the receiver.
Connect the equipment to 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.

This equipment complies with Part 15 of the FCC rules. Operation is subject to the following two conditions:

this device may not cause harmful interference, and
this device must accept any interference received, including interference that may cause undesired operation.

Important information
Changes or modifications to the equipment not expressly approved by Music Tribe can void the user’s authority to use the equipment.

FAQ

Q: Can I use the G20 INFINIUM with any instrument?
- A: Yes, the G20 INFINIUM can be used with various instruments such as guitars, keyboards, and microphones.
Q: How do I adjust the INFINIUM Tube Life Multiplier?
- A: The INFINIUM Tube Life Multiplier can be adjusted using the dedicated control knob located on the amplifier panel.
Q: What is the purpose of the MORPH EQ feature?
- A: The MORPH EQ feature allows you to shape the tone of your instrument by adjusting the bass and treble frequencies.
Q: How do I enable the Reverb effect?
- A: The Reverb effect can be enabled by adjusting the corresponding control knob on the amplifier panel.

Hereby, Music Tribe declares that this product complies with Directive 2014/35/EU, Directive 2014/30/EU, Directive 2011/65/EU and Amendment 2015/863/ EU, Directive 2012/19/EU, Regulation 519/2012 REACH SVHC and Directive 1907/2006/EC.