3383 Gage Avenue, Huntington Park, CA, 90255 Phone: 323-277-4100 Fax: 323-277-4108 National: 1-800-344-4384 Internet: www.B-52GUITAR.com E-mail: info@B-52PRO.com 8 E.T.I. Sound Systems is dedicated to product excellence and therefore continuously attempts to improve each and every model we manufacture. This ongoing process includes refinements in design, materials and workmanship, which may result in products that differ than those described in our literature. All features, specifications, and prices are therefore subject to change without notice. B-52 PROFESSIONAL IMPORTANT SAFETY INSTRUCTIONS! 1) 2) 3) 4) 5) 6) 6) 7) 8) 9) Read these instructions. Follow all instructions. Keep these instructions. Heed all warnings. DO NOT turn on the AT-100 without the loudspeaker connected. Do not use the AT-100 near water. Be extra cautious when moving the AT-100 during rain or while transporting it over wet surfaces as water might splash onto the amplifier. Clean only with dry cloth. Do not block any ventilation openings and operate in accordance with manufacturer's instructions. Do not install near heat sources such as radiators, stoves or other devices that may produce heat. Do not defeat the safety purpose of the polarization 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 is provided for your safety. If the provided plug does not fit your outlet, consult an electrician for replacement of the obsolete outlet. Protect the power cord from being walked on or pinched, particularly at the plug and the point where it exits the AT-100 amplifier. Only use attachments / accessories specified by B-52 Professional. Unplug the AT-100 during lightning storms and when not in use. Refer all servicing to qualified personnel. Servicing is required when the AT-100 has been damaged in any way such as when power-cord or plug is damaged, liquid has been spilled into the amplifier, the unit has been exposed to moisture or rain, does not operate normally, or has been dropped. To reduce the risk of fire or electric shock, do not expose the AT-100 to rain or moisture. Moisture can damage the AT-100 and can cause corrosion of electrical contacts. Keep the unit out of extended or intense direct sun light. No containers filled with any type of liquid should be placed on or near the AT-100. Never remove the front or rear panels of the AT-100 while it is connected to an electrical outlet. Important Safety Instructions / Features...............................................................2 Important Information ........................................3 AT-100 Controls ..................................................4-5 Set-up & Warranty Information .........................5-7 Contact Information ...........................................8 This B-52 Stealth Series AT-100 has a 100% pure, all-tube signal path, incredible tone and a wide array of guitarist friendly features. It combines Russian Sovtek 6L6 power tubes with 12AX7 preamp tubes for solid tube tone and classic breakup. This roadworthy head provides serious musicians with monstrous gain, extreme levels of distortion and a sparkling clean channel. Selectable solidstate or tube rectification through a Sovtek 5AR4 ensures complete tonal authenticity. q q INSIDE THIS INSTRUCTION MANUAL AT-100 FEATURES 10) 11) 12) 13) q q q q q q q q q q q 14) 15) 16) 1/4" High and Low Input Jacks Overdrive channel with Gain1, Gain2, assignable Contour, three band EQ and level controls Clean Channel with Level control, 3 band EQ and Bright switch Master section with Volume, Low-Resonance and Reverb controls Rugged footswitch for Channel Select, Gain Select, Reverb on/off and Effects Loop on/off Push switches for channel, gain select and Contour assign Effects send and return with level controls Line out with level control Two speaker output jacks - selector switch for 4, 8 or 16 ohms Ground lift switch Rectifier select switch for: Tube A, Tube AB1 and Solid-State 27" x 11" x 11" (W x H x D) Weight: 52 lbs. SOVTEK TUBE CHART 4 6 1 1 x x x x Power Tubes: Preamp Tubes: Reverb Tube: Rectifier Tube: 6L6 12AX7 12AT7 5AR4 17) 2 RISK OF ELECTRIC SHOCK DO NOT OPEN CAUTION HEED ALL WARNINGS! WARNING: To reduce the risk or fire or electrical shock do not expose this equipment to rain or moisture. Thank you for choosing the B-52 AT-100 amplifier. This guitar amplifier is perfect for guitarists of every level. Whether you are playing to a stadium crowd of 50,000 or practicing at home in your garage, the AT-100 will produce awesome crunch, smooth mids and crystal-clean highs. It is also capable of producing massive amounts of distortion, perfect for any style from blues to metal. This instruction manual explains all that the AT-100 has to offer, how to operate and control each feature so you can achieve the sound you desire. B-52 HIGHLY recommends that you read this detailed instruction manual carefully and heed all warnings. AT-100 100-WATT ALL-TUBE LEAD GUITAR AMPLIFIER! B-52 AT-Series Speaker Cabinets (Recommended for use with AT-100) AT-412A ­480-Watt RMS speaker cabinet - Slant AT-412B ­480-Watt RMS speaker cabinet - Straight The B-52 AT-412A and AT-412B, 4x12" slant and straight cabinets are a perfect complement to the AT-100 all-tube amplifier. They offer awesome tone and incredible projection. With four custom-built, 120-watt 12" speakers, these cabinets provide crystal clear highs and heavy distortion with classic breakup. FEATURES: q 4 x 120-watt, custom built, heavy-duty speakers q Cloth-finished front q Rear porting for extended low-frequency response q Metal handles, rubber feet and metal corners q Detachable casters for easy transport q Authentic black vinyl finish q Baltic Birch Construction q Mono/Stereo Switchable AT-412A AT-412B B-52 Stealth Series amplifiers and speakers, including the AT-100, are capable of producing sound pressure levels (SPL) sufficient to cause permanent hearing damage to performers, production crews or people in the audience. Hearing protection devices such ear-plugs are recommended. Caution should be taken to avoid extended SPL is excess of 90 dBA. Do not attempt to service the AT-100 by yourself. Refer all servicing to a B-52 Stealth Series Authorized dealer. Service is required when the AT-100 has had liquid spilled on or inside the unit, has been damaged in any way, has been exposed to rain or moisture, does not operate normally or has been dropped. To reduce the risk of fire or electrical shock, do not expose this unit to rain or moisture. Do not operate your AT-100 near a pool or other standing water. Make sure all blades on the polarized power plug are fully inserted into the power source. Ensure the power cord is not stretched, pinched or otherwise abused. Ensure the power cord is routed to avoid foot traffic. Your AT-100 amplifier should be cleaned only with a dry cloth. HEARING DAMAGE, PROLONGED EXPOSURE TO EXCESSIVE SPL AMPLIFIER MODULE PRECAUTIONS WARNING ­ SHOCK HAZARD: 3 AT-100 - FRONT PANEL FEATURES & DESCRIPTIONS 1. 2. 3. 4. POWER ON/OFF SWITCH: Turns the AT-100 on and off. STANDBY ON/OFF SWITCH: Allows the AT-100 to remain turned ON for limited periods of inactivity without the risk of damaging / over-heating the amplifier tubes. When the Standby switch is in the STANDBY position the AT-100 is in a nonoperational setting. When in Standby the Sovtek tubes remain hot and ready for use. This bypasses the time required for the tubes to warm up before use. When the Standby switch is in the ON position the AT-100 is operational and should not be left inactive. DO NOT turn on the AT-100 or have the Standby switch set to ON without it connected to a loudspeaker. PILOT JEWEL. Power on indicator. MASTER REVERB CONTROL: Adjusts the amount of reverb produced by the amplifier. To increase the amount of reverb turn clockwise. AT-100 - Rear Panel Features & Descriptions To reduce the risk of fire or electrical shock, do not expose this unit to rain or moisture. Do not operate your AT-100 near a pool or other standing water. Make sure all blades on the polarized power plug are fully inserted into the power source. Ensure the powercord is not stretched, pinched or otherwise abused. Ensure the power cord is routed to avoid foot traffic. Your AT-100 amplifier should be cleaned only with a dry cloth. WARNING: SHOCK HAZARD! MASTER LOW RESONANCE: Controls the overall resonance of the amplifier. Turning the control clockwise adds rich low end. 6. MASTER VOLUME: Controls the overall signal level of the AT-100. To increase the overall signal and/or volume, rotate the control clockwise. The Master volume control allows you to preset the output levels of both the Clean and Overdrive Channels. 7. CLEAN CHANNEL ­ VOLUME: Controls the overall signal level of the clean channel.Adjusting the volume control enables you to produce sparkling clean sounds to crunchy, dirty blues. Turned all the way to the left you will experience clean sounds. A setting all the way to the right will produce moderate levels of distortion. 8. CLEAN CHANNEL - BRIGHT: Adds high end sparkle. 9. CLEAN CHANNEL - TREBLE: Adjusts the amount of high frequency boost or cut as desired in the clean channel. Treble adds brightness to your tone. Turning this control clockwise will add brilliance to your sound. Turning the control counterclockwise softens the tone. 10. CLEAN CHANNEL - MIDDLE: Adjusts the amount of mid-range frequencies as desired in the clean channel. Turning the middle control clockwise will increase the amount of warmth in your tone. Counterclockwise settings create a more pristine, acoustic kind of sound. 5. 4 26. EFFECTS - SEND JACK: Connects to the AT-100 to the input off an effects unit. 27. EFFECTS ­ SEND LEVEL: Controls the sending level output to an effects unit. 28. EFFECTS ­ RETURN LEVEL: Controls the input capacity of the returning signal from an effects unit. 29. EFFECTS ­ RETURN JACK: Connects the AT-100 to the output of an effects unit. 30. FOOTSWITCH ­ GAIN AND CHANNEL SWITCH: Switch 31. 32. 33. 34. between Gain 1 and Gain 2 in the overdrive Channel. Also switches between clean and overdrive channel. FOOTSWITCH - EFFECTS/REVERB: Connects footswitch to turn the reverb on/off and the effects loop on/off. LINE OUT JACK: Connects the AT-100 to an external linelevel device such as a mixing board. LINE OUT LEVEL CONTROL: Controls the output capacity of the Line Out Level. IMPEDANCE SELECTOR SWITCH: Allows the AT-100 to safely 11. CLEAN CHANNEL - BASS: Adjusts the amount of low frequency boost or cut as desired. Adding bass will increase the depth and fullness of your sound. 12. CHANNEL SELECT: Push switch selects between the clean and overdrive channels. Activated LED lights indicate which channel is in use. 13. OVERDRIVE ­ VOLUME 2: Controls the overall volume of the high gain overdrive channel. 14. OVERDRIVE ­ VOLUME 1: Controls the overall volume of the medium gain overdrive channel. 15. OVERDRIVE CHANNEL ­ GAIN SWITCH 2: Activates the CONTOUR control for Gain 2. 16. OVERDRIVE CHANNEL ­ CONTOUR: Varies the critical midrange tone in the overdrive channels. Adjusts from "classic" midrange punch to "scooped metal" madness. 17. OVERDRIVE CHANNEL ­ GAIN SWITCH 1: Activates the CONTOUR control for Gain 1. 18. OVERDRIVE CHANNEL ­ TREBLE: Adjusts the amount of high frequency boost or cut as desired in the overdrive channel. Turning this control clockwise adds clarity to your sound. 19. OVERDRIVE CHANNEL ­ MIDDLE: Adjusts the amount of mid-range frequencies as desired in the overdrive channel. Similar to the Clean Channel function, the O.D. Channel Middle control adds body and punch to your sound. 20. OVERDRIVE CHANNEL ­ BASS: Adjusts the amount of low frequency boost or cut as desired in the overdrive channel. Bass is B-52's signature. Turning this control clockwise increases depth and low-end punch to your music. 21. OVERDRIVE CHANNEL ­ GAIN 2: Adjusts the amount of distortion in Gain 1. (Activated LED indicates in use). 22. OVERDRIVE CHANNEL ­ GAIN SWITCH: Push switch Selects between Gain 1 and Gain 2 controls. Activated LED lights indicate which channel is currently use. 23 OVERDRIVE CHANNEL ­ GAIN 1: Adjusts the amount of distortion in Gain 1. (Activated LED indicates in use). 24. INPUT CONNECTOR - LOW: Connects your guitar to the AT-100. B-52 recommends that you use a cable that is screened or shielded. 24. INPUT CONNECTOR - HIGH: Plug your guitar into either one. Use the one that sounds best to you. Always use a high quality, shielded instrument cable. operate into any 4 ohm, 8 ohm or 16 ohm cabinets(s). NOTE: Always set the switch to match the impedance of your cabinet(s). 35. LOUDSPEAKER OUTPUTS: Connects the AT-100 to the speaker cabinets such as the AT-412A or AT-412B. 36. GROUND / LIFT SWITCH: Removes ground from the circuit to eliminate ...