IMPORTANT SAFETY INSTRUCTIONS! 1) 2) 3) 4) 5) Read these instructions. Follow all instructions. Keep these instructions. Heed all warnings. DO NOT turn on the ST-6012 without the loudspeaker connected. Do not use the ST-6012 near water. Be extra cautious when moving the ST-6012 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 ST-6012 amplifier. Only use attachments / accessories specified by B-52 Professional. Unplug the ST-6012 during lightning storms and when not in use. Refer all servicing to qualified personnel. Servicing is required when the ST-6012 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 ST-6012 to rain or moisture. Moisture can damage the ST-6012 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 ST-6012. Never remove the front or rear panels of the ST-6012 while it is connected to an electrical outlet. Important Safety Instructions / Features .........2 Product Information ...........................................3 ST-6012 Controls ................................................4-5 Set-up & Warranty Information .........................5-7 Contact Information ...........................................8 INSIDE THIS INSTRUCTION MANUAL 6) 6) 7) 8) 9) This B-52 Stealth Series ST-6012 has a 100% pure, all-tube signal path, incredible tone and a wide array of guitarist-friendly controls and features the legendary Celestion Vintage 30 loudspeakers. It combines Russian Sovtek 6L6 power tubes with 12AX7 preamp tubes for solid tube tone and classic breakup. This roadworthy combo provides serious musicians with monstrous gain, extreme levels of distortion and a sparkling clean channel. Selectable solid-state or tube rectification through a Sovtek 5AR4 ensures complete tonal authenticity. All-Tube signal path 2 x 12" Celestion Vintage 30s Overdrive Channel: Gain 1, Gain 2 with contour, 3-band EQ and level control Clean Channel: Level control and 3-band EQ Rectifier Select: Tube AB1, Tube A and Solid-State Line level send and return with level controls Pushswitch for channel and gain select Porcelain tube sockets for increased reliability Master volume Spring reverb Headphones line out Line out with level control Selectable 4/8/16 ohms external speaker jacks Ground lift switch Rugged footswitch for channel select, Reverb on/off and gain select Rugged 18mm Baltic birch construction Detachable casters for easy transport 27" x 21" x 11" (W x H x D) Weight: 73 lbs. ST-6012 FEATURES 10) 11) 12) 13) 14) 15) 16) 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 Stealth Series ST-6012 combo. The B-52 ST-6012 is a feature-laden all-tube 2 x 12" open-backed combo with 60 relentless watts ripping through two Celestion Vintage 30s. The ST-6012's foundation is outstanding tone, versatility and power. Each channel - Clean and Overdrive - has its own set of gain, treble, mid and bass equalization controls for maximum flexibility. The Clean Channel goes from classic sparkle to serious crunch while the Overdrive Channel features two independent gain options. Gain 1 moves from bluesy grit all the way to metallic shred. Switching to Gain 2 provides the same wide tonal range as Gain 1 but with the addition of a contour control. The contour control adds or subtracts the all important mids, effectively producing three amazing sounds that are all footswitch controllable! A 3-position rectifier switch adds even more versatility, offering Tube AB1, Tube A and Solid-State settings. The ST-6012 also features solid Baltic birch construction, detachable casters and a three function heavy-duty footswitch. ST-6012 60-WATT ALL-TUBE LEAD GUITAR COMBO! Power Tubes: Preamp Tubes: Reverb Tube: Rectifier Tube: SOVTEK TUBE CHART 2 5 1 1 x x x x 6L6 / 5881 12AX7 12AT7 5AR4 Power Handling: Freq. Response: Nominal Impedance: Sensitivity (dB): Voice Coil Diameter: Magnet Weight: 70 watts 70-5K Hz 16 Ohms 100 1 3/4" 50 oz B-52 Stealth Series amplifiers and speakers, including the ST-6012, 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 ST-6012 by yourself. Refer all servicing to a B-52 Stealth Series Authorized dealer. Service is required when the ST-6012 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 ST-6012 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 ST-6012 amplifier should be cleaned only with a dry cloth. HEARING DAMAGE, PROLONGED EXPOSURE TO EXCESSIVE SPL AMPLIFIER MODULE PRECAUTIONS WARNING ­ SHOCK HAZARD: 3 ST-6012 - Front Panel Features & Descriptions INPUTS GAIN SW. OVERDRIVE CH. SW. HIGH LOW GAIN1 0 10 GAIN2 0 10 CONTOUR 0 10 0 BASS 10 MIDDLE 0 10 TREBLE 0 10 VOLUME 0 10 INPUTS 1. 2. 3. 4. 5. INPUT CONNECTOR - HIGH: Connects your guitar to the 6. ST-6012. B-52 recommends that you always use a cable that is screened or shielded. 10 0 10 0 10 0 LOW HIGH [Try both inputs and use the GAIN1 sounds best to you. The one that GAIN2 CONTOUR bottom line is trust your ears!] INPUT CONNECTOR - LOW: Connects your guitar to the ST-6012. B-52 recommends that you always use a cable that is 7. screened or shielded. 1 2 3 4 5 OVERDRIVE CHANNEL ­ GAIN 1: Adjusts the amount of 6 distortion in Gain 1. (Activated LED indicates in use). OVERDRIVE CHANNEL ­ GAIN SWITCH: Push switch Selects 8. between Gain 1 and Gain 2 controls. Activated LED lights indicate which channel is currently use. OVERDRIVE CHANNEL ­ GAIN 2: Adjusts the amount of 9. 1 2 3 GAIN SW. 4 5 6 OVERDRIVE 16 OHMS ST-6012 - Rear Panel Features & Descriptions GND LIFT To reduce the risk of fire or electrical shock, do not expose this unit to rain or moisture. Do not operate your ST-6012 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 ST-6012 amplifier should be cleaned only with a dry cloth. WARNING: SHOCK HAZARD! distortion in Gain 2. (Activated LED indicates use). OVERDRIVE CHANNEL ­ CONTOUR: Adjusts the overall tone quality of Gain 2 in the overdrive channel. Low contour settings 10 10 0 0 10 10 0 0 emphasize middle frequencies. A higher setting will notch the VOLUME MIDDLE BASS TREBLE mid-range to produce the deep crunch sounds characteristic in most heavy metal type music. OVERDRIVE CHANNEL ­ BASS: Adjusts the amount of low frequency boost or cut as desired in the overdrive channel. Bass 11 10 9 7 8 is B-52's signature. Turning this control clockwise increases depth and low-end punch to your music. 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. 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. 10. OVERDRIVE ­ VOLUME: Controls the overall signal level of the overdrive channel. LOUDSPEAKER OUTPUTS 11. CHANNEL SWITCH: Push switch selects between the clean 60 WATTS RMS and overdrive channels. Activated LED lights indicate which channel is in use. 12. CLEAN CHANNEL ­ VOLUME: Controls the overall signal level 8 OHM / 4 OHM (4 & 8 OHMS PARRALLEL JACKS) 7 8 9 10 CH. SW. 11 V 21 22 23 GND LIFT LOUDSPEAKER OUTPUTS 25 24 60 WATTS RMS 16 OHMS (4 & 8 OHMS PARRALLEL JACKS) 26 8 OHM / 4 OHM All-Tu 4 21. AC INLET & FUSE HOLDER: Connects AC powercord as well as contains primary fuse. 22. 3-SETTING RECTIFIER SWITCH: SOLID-STATE ­ Gives tightest low-end definition and fastest attack. TUBE AB1 ­ Punchy, warm and tighter definition than Tube A. TUBE A ­ "Vintage" attack and feel. Warmest sounding setting. 23. GROUND / LIFT SWITCH: Removes ground from the circuit to eliminate 60-cycle hum. 21 22 23 24. 16 OHM LOUDSPEAKER JACK: Connects loudspeakers(s) that require a 16 Ohm load. 25. EXTERNAL LOUDSPEAKER JACKS: Connects the ST-6012 to external loudspeakers such as the ST-412V or ST-412S with a 4 Ohm or 8 Ohm load. 26. SPEAKER SELECT SWITCH: Allows you to select appropriate 4 Ohm or 8 Ohm load loudspeakers. You must ensure that the switch is set to appropriate impedance rating that matches your loudspeaker. Note: Ensure that loudspeaker impedance matches the correct jack connectors. 24 25 26 All-Tub CLEAN MASTER ON 10 ON VOLUME 0 10 BASS 0 10 MIDDLE 0 10 TREBLE 0 10 REVERB 0 10 MASTER 0 PHONES 12 OLUME 0 13. 14. 10 12 15. 16. 17. be Professional Amplifier ST-6012 of the clean channel. Adjusting the volume control enables you to 18. INPUT / PHONE JACK: Connects headphones to the ST-6012. produce sparkling clean sounds to crunchy, dirty blues. Lower 19. STANDBY ON/OFF SWITCH: Allows the ST-6012 to remain PHONES ON for limited periods of inactivity without the risk of 10 0 10 10 0 0 10 0 turned settings 10 produce pure clean tones. Turning0this control clockwill wise will gradually produce moderate distortion. damaging / over-heating the amplifier tubes. When POWER MIDDLE STANDBY the Standby MASTER TREBLE REVERB BASS CLEAN CHANNEL ­ BASS: Adjusts the amount of low switch is in the STANDBY position the ST-6012 is in a nonAll-Tube Professional Amplifier frequency boost or cut as desired in the clean channel. Adding operational setting. When in Standby the tubes remain bass will increase the warmth of your sound. hot and ready for use. When the Standby switch is in the CLEAN CHANNEL ­ MIDDLE: Adjusts the amount of mid-range ON position the ST-6012 is operational and should not be left 17 14 15 16 13 18 20 frequencies as desired in the clean channel. Turning the middle inactive. DO NOT turn on the ST-6012 or19 the Standby have control clockwise will increase the amount of punch in your switch set to ON without it connected to a loudspeaker. 20. POWER ON/OFF SWITCH: Turns the ST-6012 on and off. sound. Setting the control all the way to the left will make your music sound more hollow. CLEAN CHANNEL - TREBLE: Adjusts the amount of high AMPLIFIER PRECAUTIONS frequency boost or cut as desired in the clean channel. Turning the Treble control clockwise will sharpen your sound, Do not attempt to service the ST-6012 by alternatively, turning the control counterclockwise softens your yourself. Refer all servicing to a B-52 sound. REVERB CONTROL: Adjusts the amount of reverb produced by Authorized dealer. Service is required when the amplifier. To increase the amount of reverb turn clockwise. CAUTION EFFECTSthe ST-6012 has had liquid spilled on it or FOOT SW LINE OUT RISK OF ELECTRIC SHOCK MASTER VOLUME: Controls the overall signal level of the has been damaged in any way, theDO NOT OPEN amplifier ST-6012. To increase the overall signal and/or volume, rotate LEVEL LEVEL LEVEL CAUTION: TO REDUCE THE RISK OF the control clockwise. The Master volume control allows you to FIRE, REPLACE ONLY WITH THE SAME has been exposed to rain or TYPE OF FUSE. moisture, does TO THE RISK preset the output levels of both t ...