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-100A without the
5)
loudspeaker connected.
6) Do not use the ST-100A near water. Be extra
cautious when moving the ST-100A 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. 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.
10) Protect the power cord from being walked on
or pinched, particularly at the plug and the
point where it exits the ST-100A amplifier.
11) Only use attachments / accessories specified
by B-52 Professional.
12) Unplug the ST-100A during lightning storms
and when not in use.
13) Refer all servicing to qualified personnel.
Servicing is required when the ST-100A 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-100A to rain or moisture.
15) Moisture can damage the ST-100A 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-100A.
Never remove the front or rear panels of
17)
the ST-100A while it is connected to an
electrical outlet.
INSIDE THIS INSTRUCTION MANUAL
Important Safety Instructions /
Features...............................................................2
Important Information........................................3
ST-100A Controls................................................4-5
Set-up & Warranty Information.........................5-7
Contact Information...........................................8
ST-100A FEATURES
This B-52 Stealth Series ST-100A 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 solid-state or tube rectification
through a Sovtek 5AR4 ensures complete tonal authenticity.
●
1/4” high input jacks
●
Overdrive channel with gain 1, gain 2 with contour, 3-band
EQ and level control
●
Clean channel with level control and 3-band EQ
●
Master volume and reverb
●
Rugged foot switch for channel select, reverb on/off and
gain select
●
Push switch for channel and gain select
●
Headphones line out
●
Effects send and return with level controls
●
Line out with level control
●
Selectable external speaker jacks
●
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
Power Tubes: 4 x 6L6
Preamp Tubes: 5 x 12AX7
Reverb Tube: 1 x 12AT7
Rectifier Tube: 1 x 5AR4
HEED ALL WARNINGS!
2
WARNING: To reduce the risk or fire or
electrical shock do not expose this
equipment to rain or moisture.
ST-100A 100-WATT ALL-TUBE LEAD GUITAR AMPLIFIER!
Thank you for choosing the B-52 Stealth Series ST-100A 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 ST-100A 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 ST-100A 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.
B-52 STEALTH SERIES LOGOS
B-52’s lead guitar speaker cabinets are fitted with chrome or gold logos. You will notice that the ST-100A tube
amplifier has a chrome finish. If you have purchased a B-52 LG-412V and/or LG-412S (pictured below) to accompany the ST-100A, as a half-stack or full-stack, simply replace the gold logo on the speaker grill with the chrome logo provided
inside the ST-100A packaging. To remove the gold logo, gently place a flat-head screw driver between the back of the logo and
metal grill and “pop” it off. To attach the chrome logo, B-52 recommends using a multi-purpose silicon, which can be purchased
from most hardware stores. Apply this silicon to the back of the chrome logo and push firmly onto the grill. Allow approximately
1hr to dry. If you already own a LG-412V or LG-412S and need matching B-52 chrome logos, please call 1-800-344-4384 to
request shipment.
B-52 Stealth Series Speaker Cabinets
(Recommended for use with ST-100A)
LG-412V –400-Watt RMS speaker cabinet - Slant
LG-412S –400-Watt RMS speaker cabinet - Straight
The B-52 LG-412V and LG-412S, 4 x 12” slant and
straight cabinets are a perfect complement to the
ST-100A all-tube amplifier. They offer awesome tone and
incredible projection. With four custom-built, 100-watt 12”
speakers, these cabinets provide crystal clear highs and
heavy distortion with classic breakup.
FEATURES:
●
4 x 100-watt, custom built, heavy-duty speakers
●
16-gauge metal grill for ultimate protection
●
Rear porting for extended low-frequency response
●
Metal handles, rubber feet and metal corners
●
Detachable casters for easy transport
●
Authentic black vinyl finish
HEARING DAMAGE, PROLONGED EXPOSURE TO EXCESSIVE SPL
B-52 Stealth Series amplifiers and speakers, including the ST-100A, 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.
LG-412V
LG-412S
AMPLIFIER MODULE PRECAUTIONS
Do not attempt to service the ST-100A by yourself. Refer all servicing to a B-52 Stealth Series Authorized dealer. Service is required when
the ST-100A 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-100A 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-100A amplifier should be cleaned only
with a dry cloth.
3
0
10
VOLUME
0
10
BASS
0
10
MIDDLE
0
10
TREBLE
CLEAN
0
10
REVERB
0
10
MASTER
PHONES
POWER
ON
ST-100A
STANDBY
ON
All-Tube Professional Amplifier
MASTER
1 2
3
4
5
6
7
8
9
0
10
VOLUME
0
10
BASS
0
10
MIDDLE
0
10
TREBLE
CLEAN
0
10
REVERB
0
10
MASTER
PHONES
POWER
ON
ST-100A
CAUTIONCAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
WARNING:
TO REDUCE THE RISK OF
FIRE OR ELECTRICAL SHOCK, DO NOT
EXPOSE THIS EQUIPMENT TO RAIN
OR MOISTURE
CAUTION: TO REDUCE THE RISK OF
FIRE, REPLACE ONLY WITH THE SAME
TYPE OF FUSE.
S/No.:
CC
LINE OUT
LEVEL
LEVEL LEVEL
ST-100A
All-Tube Professional Amplifier
FOOT SW
GAIN &
CHANNEL
REVERB
4
STANDBY
ON
All-Tube Professional Amplifier
MASTER
1 2
3
4
5
6
7
8
9
21
22
EFFECTS
SEND RETURN
23
24
25 26 27 28
ST-100A - Front Panel Features & Descriptions
1. POWER ON/OFF SWTICH: Turns the ST-100A on and off.
2. STANDBY ON/OFF SWITCH: Allows the ST-100A to remain
turned ON for limited periods of inactivity without the risk of
3. INPUT / PHONE JACK: Connects headphones to the ST-100A.
4. MASTER VOLUME: Controls the overall signal level of the
damaging / over-heating the amplifier tubes. When the Standby
switch is in the STANDBY position the ST-100A 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 ST-100A is operational and should not be left
inactive. DO NOT turn on the ST-100A or have the Standby
switch set to ON without it connected to a loudspeaker.
ST-100A. To increase the overall signal and/or volume, rotate
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-100A 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-100A amplifier should be cleaned only with a dry cloth.
5. REVERB CONTROL: Adjusts the amount of reverb produced by
6. CLEAN CHANNEL - TREBLE: Adjusts the amount of high
7. CLEAN CHANNEL – MIDDLE:Adjusts the amount of mid-range
8. CLEAN CHANNEL – BASS: Adjusts the amount of low
9. CLEAN CHANNEL – VOLUME: Controls the overall signal level
ST-100A - Rear Panel Features & Descriptions
the control clockwise. The Master volume control allows you to
preset the output levels of both the Clean and Overdrive
Channels.
the amplifier. To increase the amount of reverb turn clockwise.
frequency boost or cut as desired in the clean channel. Treble
adds brightness to your music. Turning the Treble control
clockwise will sharpen your sound, alternatively, turning the
control counterclockwise softens your sound.
frequencies as desired in the clean channel. Turning the middle
control clockwise will increase the amount of depth in your
music. Setting the control all the way to the left will make your
music sound more hollow.
frequency boost or cut as desired in the clean channel. Adding
bass will increase the warmth of your sound.
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.
4
21. LINE OUT JACK: Connects the ST-100A to an external line-
level device such as a mixing board.
22. LINE OUT LEVEL CONTROL: Controls the output capacity of
the Line Out Level.
23. EFFECTS - SEND JACK: Connects to the ST-100A to the input
off an effects unit.
24. EFFECTS – SEND LEVEL: Controls the sending level output to
an effects unit.
25.EFFECTS – RETURN LEVEL: Controls the input capacity of
the returning signal from an effects unit.
26. EFFECTS – RETURN JACK: Connects the ST-100A to the
output of an effects unit.
27. FOOTSWITCH – GAIN AND CHANNEL SWITCH: Switch
between Gain 1 and Gain 2 in the overdrive Channel. Also
switches between clean and overdrive channel.
28. FOOTSWITCH – REVERB INPUT JACK: Connects footswitch
to turn Reverb On/Off.
29.
SPEAKER SELECT SWITCH: Allows you to select appropriate
INPUTS
LOW
0
10
CONTOUR
0
10
BASS
0
10
MIDDLE
0
10
TREBLE
GAIN SW.
0
10
VOLUME
OVERDRIVE
0
10
GAIN1
0
10
GAIN2
CH. SW.
HIGH
10 11
12
13
14 15
16
17 18 19 20
INPUTS
LOW
0
10
CONTOUR
0
10
BASS
0
10
MIDDLE
0
10
TREBLE
GAIN SW.
0
10
VOLUME
OVERDRIVE
0
10
GAIN1
0
10
GAIN2
CH. SW.
GND
LIFT
4 OHM/8 OHM
LOUDSPEAKER OUTPUTS
100 WATTS RMS
(4 & 8 OHMS PARRALLEL JACKS) 16 OHMS
HIGH
10
11
12
13
14 15
16
17 18 19 20
29 30
32 33 34
31
10. CHANNEL SWITCH: Push switch selects between the clean
and overdrive channels. Activated LED lights indicate which
channel is in use.
11. OVERDRIVE – VOLUME: Controls the overall signal level of the
overdrive channel.
12. 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.
13. 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.
14. 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.
15. OVERDRIVE CHANNEL – CONTOUR: Adjusts the overall tone
quality of Gain 2 in the overdrive channel. Low contour settings
emphasize middle frequencies. A higher setting will notch the
mid-range to produce the deep crunch sounds characteristic in
most heavy metal type music.
16. OVERDRIVE CHANNEL – GAIN 2: Adjusts the amount of
distortion in Gain 2. (Activated LED indicates use).
17. OVERDRIVE CHANNEL – GAIN SWITCH: Push switch Selects
between Gain 1 and Gain 2 controls. Activated LED lights
indicate which channel is currently use.
18. OVERDRIVE CHANNEL – GAIN 1: Adjusts the amount of
distortion in Gain 1. (Activated LED indicates in use).
19. INPUT CONNECTOR - LOW: Connects your guitar to the
ST-100A. B-52 recommends that you use a cable that is
screened or shielded.
20. INPUT CONNECTOR - HIGH: Connects your guitar to the
ST-100A. B-52 recommends that you use a cable that
is screened or shielded.
[Try both inputs and use the one that sounds best to you. The
bottom line is trust your ears!]
AMPLIFIER PRECAUTIONS
Do not attempt to service the ST-100A by yourself. Refer
all servicing to a B-52 Authorized dealer. Service is
required when the ST-100A has had liquid spilled on it or
has been damaged in any way, the amplifier has been
exposed to rain or moisture, does not operate normally or
has been dropped.
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.
30. EXTERNAL LOUDSPEAKER JACKS: Connects the
ST-100A to external loudspeakers such as the LG-412V or
LG-412S with a 4 Ohm or 8 Ohm load.
31. 16 OHM LOUDSPEAKER JACK: Connects loudspeakers(s)
that require a 16 Ohm load.
32. GROUND / LIFT SWITCH: Removes ground from the circuit
to eliminate 60-cycle hum.
33. 3-SETTING RECTIFIER SWITCH:
SOLID-STATE – Gives tighest 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.
34. AC INLET & FUSE HOLDER: Connects AC powercord
as well as contains primary fuse.
5
WARRANTY INFORMATION
Limited Warranty
This Limited Warranty is effective as of January 1, 2002. Any warranty claim on B-52 products purchased before this date may be subject to monetary charges. Warranty valid ONLY
to original purchaser with PROOF OF PURCHASE.
Thank you for choosing a B-52 sound product. B-52 manufactures some of
the world’s best sounding and most reliable professional speaker systems,
amplifiers and components. E.T.I. Sound Systems, Inc., makers of B-52, takes
great pride in thoroughly testing each B-52 product prior to shipment.
B-52 CABINETS: E.T.I. Sound Systems, Inc. offers a LIFETIME warranty
(effective January 1, 2002) to the original purchaser that a B-52's cabinet
construction will be free from defects in material and workmanship. A dated
sales receipt will establish coverage under this warranty. This warranty does
not cover service or parts to repair damage caused by neglect, abuse, normal & wear and cosmetic appearance of the cabinetry not directly attributed
to defects in material or workmanship, or service, repair, modifications of the
cabinet, which has not been authorized or approved by E.T.I. If this product
is defective in materials or workmanship as warranted above, your sole remedy shall be repair or replacement as provided above.
LOUDSPEAKER AND MID-RANGE COMPONENTS: E.T.I. Sound
Systems, Inc. warrants the original purchaser that B-52 loudspeakers and/or
midrange components will be free from defects in material and workmanship
for a period of (5) FIVE YEARS from the original purchase date (effective
January 1, 2002). A dated sales receipt will establish coverage under this
warranty. This warranty will automatically terminate (5) years after the original retail sales date. This (5) five-year warranty does not cover service or
parts to repair damage caused by accident, disaster, misuse, abuse, burnt
voice-coils, over-powering, negligence, inadequate packing or shipping procedures and service, repair or modifications of the component which has not
been authorized or approved by E.T.I.. This warranty is in lieu of all other
expressed warranties. If this product is defective in materials or workmanship as warranted above, your sole remedy shall be repair or replacement
as provided above.
HIGH-FREQUENCY DEVICES: E.T.I. Sound Systems, Inc. offers a LIFE-
TIME warranty (effective January 1, 2002) to the original purchaser that
B-52 high frequency (tweeters) devices will be free from defects in material
and workmanship. A dated sales receipt will establish coverage under this
warranty. This warranty does not warranty neglect or abuse.
TY IS OFFERED ON HIGH-FREQUENCY DEVICES IN B-52 SYSTEMS
WITH A BI-AMP SWITCH OPTION
cy devices does not cover service or parts to repair damage caused by accident, disaster, misuse, abuse, negligence, inadequate packing or shipping
procedures or service, repair or modifications of the product which has not
been authorized or approved by E.T.I. This warranty is in lieu of all other
expressed warranties. If this product is defective in materials or workmanship as warranted above, your sole remedy shall be repair or replacement
as provided above.
GUITAR AMPLIFIERS: E.T.I. Sound Systems, Inc. warrants the original pur-
chaser that B-52 guitar amplifiers will be free from defects in material and
workmanship for a period of (5) FIVE YEARS from the original purchase date
(effective January 1, 2002). A dated sales receipt will establish coverage
under this warranty. This warranty will automatically terminate (5) years after
the original retail sales date. This (5) five-year warranty does not cover service or parts to repair damage caused by accident, disaster, misuse, abuse,
over-powering, negligence, inadequate packing or shipping procedures and
service, repair or modifications of the amplifier which has not been authorized or approved by E.T.I.. This warranty is in lieu of all other expressed warranties. If this product is defective in materials or workmanship as warranted
above, your sole remedy shall be repair or replacement as provided above.
. The lifetime warranty on high-frequen-
NO WARRAN-
ty will automatically terminate 90 Days after the original retail sales date.
This 90-Day warranty does not cover service or parts to repair damage
caused by accident, disaster, misuse, abuse, over-powering, negligence,
inadequate packing or shipping procedures and service, repair or modifications of the amplifier which has not been authorized or approved by E.T.I..
This warranty is in lieu of all other expressed warranties. If this product is
defective in materials or workmanship as warranted above, your sole remedy shall be repair or replacement as provided above.
RETURN PROCEDURES: In the unlikely event that a defect should occur,
follow the procedure outlined below. Defective products must be shipped,
together with proof of purchase, freight pre-paid and insured to the
Authorized B-52 Dealer from whom you purchased the product or directly to
E.T.I. Sound Systems. If a product must be returned to E.T.I. Sound Systems
for warranty replacement/repair, a
obtained from our Customer Service Department prior to shipping the product.
NEVER RETURN THE ENTIRE CABINET__JUST THE DEFECTIVE COMPONENT. Identify and remove the defective component. If you are uncertain
which component is defective, or need directions for removing a component,
please contact our Customer Service Department for assistance.
Components which are a part of an original B-52 speaker box must be sent
directly to E.T.I. Products must be shipped in the original packaging or its
equivalent; in any case, the risk of loss or damage in transit is to be borne
by the purchaser. The Return Authorization Number must appear in large
print directly below the shipping address. Always include a brief description
of the defect, along with your correct return address and telephone number.
When calling to inquire about a returned product, always refer to the Return
Authorization Number. If E.T.I. determines that the unit was defective in
materials or workmanship at any time during the warranty period, E.T.I. has
the option of repairing or replacing the product at no additional charge,
except as set forth below. All replaced parts become a property of E.T.I.
Products replaced or repaired under this warranty will be returned via
ground-shipping-within the United States-freight prepaid.
responsible for costs associated with expedited shipping, either to
E.T.I. or the return of the product to the customer.
INCIDENTAL OR CONSEQUENTIAL DAMAGE:
liable for any incidental or consequential damages arising out of the use or
inability to use of any B-52 product, even if E.T.I. or a B-52 dealer has been
advised of the possibility of such damages, or any other claim by any other
party. Some states do not allow the exclusion or limitation of consequential
damages, so the above limitation and exclusion may not apply to you. This
warranty gives you specific legal rights and you may also have other rights
which may vary from state to state.
FOR YOUR PROTECTION: Please complete and mail the Purchase
Information Card within (10) ten days of the date of purchase so that we
may contact you directly in the event a safety notification issued in accordance with the 1972 Consumer Product Safety Act. In addition, we ask that
you complete the brief questionnaire so me may analyze your answers and
in this way, help us evaluate our customer needs.
CUSTOMER SERVICE: Our dedicated staff is ready to help you with any
B-52 warranty or product questions you may have. Please call 323-277-4100
(9:00AM to 4:00PM Pacific Standard Time, United States).
Return Authorization Number must be
E.T.I. is not
In no event will E.T.I. be
GUITAR AMPLIFIER TUBES: E.T.I. Sound Systems, Inc. warrants the orig-
inal purchaser that amplifier tubes used in B-52 Stealth Series All-Tube
Amplifiers will be free from defects in material and workmanship for a period
of 90 DA
dated sales receipt will establish coverahe under this warranty. This warran-
YS from the original date of purchase (effective January 1, 2002). A
6
E.T.I. Sound Systems, INC.
3383 Gage Ave., Huntington Park, CA, 90255
3383 Gage Avenue, Huntington Park, CA, 90255
Phone: 323-277-4100 Fax: 323-277-4108
National: 1-800-344-4384
Internet: www.B-52PRO.com
E-mail: info@B-52PRO.com
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
8
differ than those described in our literature. All featur es, specifications, and prices ar e therefore subject to change without notice.
Loading...