B-52 ST6012 User Manual

CAUTIONCAUTION

RISK OF ELECTRIC SHOCK

DO NOT OPEN

IMPORTANT SAFETY

INSTRUCTIONS!

1) Read these instructions.

2) Follow all instructions.

3) Keep these instructions.

4) Heed all warnings.

DO NOT turn on the ST-6012 without the

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loudspeaker connected.

6) 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.

6) Clean only with dry cloth.

7) Do not block any ventilation openings and
operate in accordance with manufacturer’s
instructions.

8) Do not install near heat sources such as
radiators, stoves or other devices that may
produce heat.

9) 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. Agrounding-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.

10) Protect the power cord from being walked on
or pinched, particularly at the plug and the
point where it exits the ST-6012 amplifier.

11) Only use attachments / accessories specified
by B-52 Professional.

12) Unplug the ST-6012 during lightning storms
and when not in use.

13) 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.

14) To reduce the risk of fire or electric shock, do
not expose the ST-6012 to rain or moisture.

15) Moisture can damage the ST-6012 and can
cause corrosion of electrical contacts.

16) 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

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the ST-6012 while it is connected to an
electrical outlet.

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INSIDE THIS INSTRUCTION MANUAL

Important Safety Instructions / Features.........2

Product Information...........................................3

ST-6012 Controls................................................4-5

Set-up & Warranty Information.........................5-7

Contact Information...........................................8

ST-6012 FEATURES

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.

l All-Tube signal path
l 2 x 12" Celestion Vintage 30s
l Overdrive Channel: Gain 1, Gain 2 with contour,
l 3-band EQ and level control
l Clean Channel: Level control and 3-band EQ
l Rectifier Select: Tube AB1, Tube A and Solid-State
l Line level send and return with level controls
l Pushswitch for channel and gain select
l Porcelain tube sockets for increased reliability
l Master volume
l Spring reverb
l Headphones line out
l Line out with level control
l Selectable 4/8/16 ohms external speaker jacks
l Ground lift switch
l Rugged footswitch for channel select,
l Reverb on/off and gain select
l Rugged 18mm Baltic birch construction
l Detachable casters for easy transport

27” x 21” x 11” (W x H x D)
Weight: 73 lbs.

HEED ALL WARNINGS!

WARNING: To reduce the risk or fire or

electrical shock do not expose this
equipment to rain or moisture.

ST-6012 60-WATT ALL-TUBE LEAD GUITAR COMBO!

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 Aand Solid-State settings. The ST-6012 also features solid Baltic
birch construction, detachable casters and a three function heavy-duty footswitch.

SOVTEK TUBE CHART

Power Tubes: 2 x 6L6 / 5881
Preamp Tubes: 5 x 12AX7
Reverb Tube: 1 x 12AT7
Rectifier Tube: 1 x 5AR4

Power Handling: 70 watts
Freq. Response: 70-5K Hz
Nominal Impedance: 16 Ohms
Sensitivity (dB): 100
Voice Coil Diameter: 1 3/4”
Magnet Weight: 50 oz

HEARING DAMAGE, PROLONGED EXPOSURE TO EXCESSIVE SPL

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.

AMPLIFIER MODULE PRECAUTIONS

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.

WARNING – SHOCK HAZARD:

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.

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