Bugera 333 INFINIUM Guitar Amplifier User Guide

: June 7, 2024
: Bugera

Table of Contents

Bugera 333 INFINIUM Guitar Amplifier
Important Safety Instructions
- IMPORTANT NOTICE
Installation
Specifications
References
Read User Manual Online (PDF format)
Download This Manual (PDF format)

Bugera 333 INFINIUM Guitar Amplifier

amplifier product

Important Safety Instructions

Terminals marked with this symbol carry electrical current of sufficient 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 modification should be performed only by qualified personnel. 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.
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.
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.
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.

Read these instructions.
Keep these instructions.
Heed all warnings.
Follow all instructions.
Do not use this apparatus near water.
Clean only with dry cloth.
Do not block any ventilation openings. Install in accordance with 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. 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 fit into your outlet, consult an electrician for replacement of the obsolete outlet.
Protect the power cord from being walked on or pinched particularly at plugs, convenience receptacles, and the point where they exit from the apparatus.
Use only attachments/accessories specified by the manufacturer.
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.
Unplug this apparatus during lightning storms or when unused for long periods of time.
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.
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.
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.
Do not install in a confined space, such as a book case or similar unit.
Do not place naked flame sources, such as lighted candles, on the apparatus.
Please keep the environmental aspects of battery disposal in mind. Batteries must be disposed-of at a battery collection point.
This apparatus may be used in tropical and moderate climates up to 45°C.

LEGAL DISCLAIMER

Music Tribe 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. 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, Oberheim, Auratone, Aston Microphones and Coolaudio are trademarks or registered trademarks of Music Tribe Global Brands Ltd. © Music Tribe Global Brands Ltd. 2021 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 musictribe.com/warranty

IMPORTANT NOTICE

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.
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 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.

Installation

Step 1: Hook-Up

Split-signal recording/live setup installation 1

333XL-212 INFINIUM with external effects installation 2

Step 2: Controls

Front Panel

POWER switch is used to turn the power of the Bugera amplifier on and off.
STANDBY switch allows you to place the amp in STANDBY mode. This way the amp is idle, but the operational temperature of the tubes is maintained (POWER switch turned on).
Attention! To avoid damage to your amp, never use the Bugera tube amplifier without a loudspeaker connected!
MASTER control adjusts the overall-volume level of the Bugera.
PRESENCE control modifies the amp’s damping factor at high frequencies (only 333XL INFINIUM and 333XL-212 INFINIUM).
REVERB control determines the amount of the built-in reverb effect.
REVERB switch activates the REVERB effect (switch glows yellow).
FX LOOP/BOOST switch activates the FX LOOP and the BOOST function (switch glows green).
NOISE GATE control determines the effect the NOISE GATE filter has on the LEAD channel (only 333XL INFINIUM and 333XL-212 INFINIUM).
VOLUME controls adjust the volume levels of all three amplifier channels.
TREBLE controls of the LEAD and CRUNCH channels adjust the upper frequency range (active shelving control for up to 15 dB boost/cut).
MID controls of the LEAD and CRUNCH channels adjust the mid-frequency range (active peak/notch control for up to 15 dB boost/cut).
BASS controls of the LEAD and CRUNCH channels adjust the lower frequency range (active shelving control for up to 15 dB boost/cut).
GAIN control lets you determine the input level of the LEAD and CRUNCH channels (the CLEAN channel doesn’t feature a GAIN control).
XL switches of the LEAD and CRUNCH channels change the amplifier’s response at low frequencies (only 333XL INFINIUM and 333XL-212 INFINIUM). It fattens up the tone by providing more low-end.
LEAD switch activates the LEAD channel (switch glows red).
CRUNCH switch activates the CRUNCH channel (switch glows yellow).
TREBLE control adjusts the upper frequency range of the CLEAN channel.
MID control adjusts the mid frequency range of the CLEAN channel.
BASS control adjusts the lower frequency range of the CLEAN channel.
CLEAN switch activates the CLEAN channel (switch glows red).
HIGH GAIN input (333 INFINIUM and 333-212 INFINIUM: INPUT) is 6 dB louder than the LOW GAIN input and is used for most electric guitars.
LOW GAIN input is used for instruments with an extremely high output level which could distort the HIGH GAIN input (only 333XL INFINIUM and 333XL-212 INFINIUM).
Rear Panel
Caution! Hot! Risk of injury! During use, the tubes 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.
LEVEL control determines the signal level sent to an external effects unit or any other signal processor (0 – 10).
SEND output is used to connect a shielded ¼” mono jack cable to the input of an external effects unit.
RETURN input is used to connect a shielded ¼” mono jack cable to the output of an external effects unit.
LEVEL control determines the signal level returned from an external effects unit or any other signal processor (0 – 10).
FOOTSW 5-pin DIN connector is provided to connect to the supplied Bugera FSB104 footswitch. Please be sure to connect the cables before switching on the amplifier.
INFINIUM TUBE LIFE MONITORING section shows correct biasing for each tube separately. When an output tube requires replacement, the tube’s matching LED will light permanently.
DAMPING switch lets you specify the damping factor of the Bugera (only 333 INFINIUM and 333-212 INFINIUM). The term “damping“ refers to a feature of the amplifier that affects the signal’s fade-out phase.
IMPEDANCE switch lets you specify the loudspeaker impedance. Always apply the value that is identical to the impedance of the used speaker cabinet.
LOUDSPEAKER parallel outputs (¼” mono jacks) are used to connect the speaker cabinet(s). The minimum impedance is 4 Ohms.
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.
LEVEL control that specifies the signal level for the OUT jack.
OUT jack provides a preamp signal in order to feed the signal to a second amplifier and loudspeaker system.
FUSE is found in the fuse holder
WARNING : ONLY REPLACE THE FUSE WHEN THE MAINS CABLE HAS BEEN DISCONNECTED! If the fuse is blown, it needs to be replaced with a fuse of the same kind. Otherwise, the unit could seriously be damaged, in which case the warranty is void.
IEC MAINS connector is used to connect the mains cable that has the appropriate voltage ratings for your country (included).
SERIAL NUMBER of the amplifier.
Footswitch
DIN cable to connect Footswitch to the FOOTSW connector on back panel of the Bugera amplifier.
CLEAN switch activates the CLEAN channel. Its LED illuminates when the channel is active.
CRUNCH switch activates the CRUNCH channel. Its LED illuminates when the channel is active.
LEAD switch activates the LEAD channel. Its LED illuminates when the channel is active.
FX LOOP switch activates the FX LOOP and the BOOST function. Its LED illuminates when the FX LOOP is active.

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 qualified service personnel. Remove the mains cable when the unit is not in use. The parts inside the amplifier operate at high voltages and high temperatures. To avoid damage and injury that results from fire or electric shock, do not drop or spill anything into the unit’s casing.

Step 3: Valve Life Monitoring

The INFINIUM Tube Life Monitoring circuitry continuously monitors the output tube biasing for optimum performance and consistent tone, even as the tubes age. When an output tube does need to be replaced, the tube’s matching LED on the back panel will light permanently. This circuitry monitors each tube individually, which means you do not need to purchase matched tube sets. Each tube will operate at ideal current levels regardless of deviations in the mains voltage. 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. You may also freely mix any combination of EL34/6550- and 6L6/5881- based tubes.

To replace a faulty output tube:

Switch off the amplifier and wait for the output tubes to cool down to a safe temperature before touching them.
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 socket.
Gently push the new tube until it seats firmly in the socket.
Switch the amplifier back on in Standby mode.
When the tubes have warmed up to operating temperature, you may switch the amplifier out of Standby mode.
The INFINIUM Tube Life Monitoring LEDs should now turn off, and you can begin playing.
When one of the front panel lights starts flashing regularly, this is to indicate the amp cannot work due to too many tube issues. In this case we recommend replacing the faulty power amp tubes immediately.

Step 4: Wiring the Bugera

Caution!
Hot! Risk of injury! During use, the tubes 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 tube amplifier without a loudspeaker connected! 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.
CAUTION : The loudspeakers in the combos are connected in series. This results in an impedance of 16 Ohms. Please ensure that the IMPEDANCE switch is set to this value (16 Ohm when using combo-version with internal speakers). installation 6

Specifications

specification 1 specification
2

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.