5) Do not use the LS-100 near water. Be
cautious when moving the LS-100 during
rain or while transporting it over wet surfaces
to prevent water from getting on to 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
third prong is provided for your safety and
must not be defeated. 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 LS-100 amplifier.
11) Only use attachments / accessories specified
by B-52 Professional.
12) Unplug the LS-100 during lightning storms
and when not in use.
13) Refer all servicing to qualified personnel.
Servicing is required if the LS-100 has
been damaged in any way. Do not operate the
unit if the 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 LS-100 to rain or moisture.
15) Moisture can damage the LS-100 and can
cause corrosion of electrical contacts.
16) Keep the unit out of extended or intense
direct sun light. Do not place containers filled
with any type of liquid on or near the LS-100.
17) Never remove the front or rear panels of
the LS-100. There are no user serviceable
parts inside.
INSIDE THIS INSTRUCTION MANUAL
Important Safety Instructions / Features .......................... 2
Important Information .................................................. 3
Set-up & Warranty Information ...................................... 5-7
Contact Information ..................................................... 8
B-52 LS-100 FEATURES
The B-52 LS-100 represents the latest in the ever expanding line of highly
acclaimed B-52 guitar amps. New, user-friendly features combined with the
latest advancements in preamp technology makes the LS-100 an outstanding choice for the professional player and the weekend warrior. The clean
channel now has the innovative B-52 “Mid Cut” feature. This pushbutton
allows you to select the classic, warm vintage sound or a pristine, almost
acoustic-like tone with tons of headroom. The overdrive channels go from
moderate classic breakup to monstrous gain, totally controllable thanks to
the individual gain and master controls for each overdrive mode. The overdrive channels now feature the new, B-52 assignable Contour control. This
allows you to preset the Contour control and have it automatically activate
on the gain channel of your choice. You can set one overdrive channel for
a punchy midrange tone with the Contour off and turn the Contour on the
other overdrive channel for a massive, totally scooped out metal tone.
¼” input jack
•
Overdrive channel with Gain 1, Gain 2, assignable Contour,
•
3-band EQ and individual Volume 1 and Volume 2 controls
Clean channel with Volume, 3 band EQ and a
•
Mid cut switch.
•
Master section with Volume and Reverb controls.
•
Rugged footswitch for Channel Select, Gain Select and
•
Reverb on/off.
Front panel push switches for channel, gain select and
•
Contour assign
Effects send and return with level controls
•
Cabinet simulated line out with level control for direct recording
•
Two speaker output jacks
•
International voltage select switch for 115 volts and 230 volts
•
27” x 11” x 12” (W x H x D)
•
Weight: 34 lbs.
•
CAUTION: To reduce the risk of electric shock, do not
remove any cover. No user-serviceable parts inside. Refer
servicing to qualified service personnel only.
The lightning flash with arrowhead symbol within the equilateral triangle is intended to alert the use to the
presence of un-insulated “dangerous voltage” within the product’s enclosure that may be of sufficient
magnitude to constitute a risk of electric shock.
The exclamation point within the equilateral triangle is intended to alert the user to the presence of important
operation and maintenance (servicing) instructions in the literature accompanying this appliance.
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 LS-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 LS-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.
The B-52 LS-412A and LS-412B, 4x12” slant and straight
cabinets are a perfect complement to the LS-100
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 grille 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
•
Mono/Stereo Switchable
•
HEARING DAMAGE, PROLONGED EXPOSURE TO EXCESSIVE SPL
B-52 guitar amplifiers and speakers, including the LS-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.
AMPLIFIER MODULE PRECAUTIONS
Do not attempt to service the LS-100 by yourself. Refer all servicing to a B-52 Guitar Amplification Authorized dealer. Service is
required when the LS-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.
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 LS-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 LS-100 amplifier
should be cleaned only with a dry cloth.
2. MASTER VOLUME: Controls the overall loudness of
the LS-100. To increase the overall volume, rotate the
control clockwise. The Master volume control allows
you to control the volume of both the Clean and
Overdrive Channels simultaneously.
3. MASTER REVERB CONTROL: Adjusts the amount
of reverb produced by the amplifier. To increase the
amount of reverb, turn clockwise.
4. CLEAN CHANNEL – VOLUME: Controls the overall
10
E
0
REVERB
3
10
0
VOLUM
2
signal level of the clean channel.
5. CLEAN CHANNEL - MID CUT: Pushed in, this
feature sets the perfect amount of midrange for a
truly pristine, almost acoustic-like sound.
6. 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 clarity to your sound.
Turning the control counter-clockwise softens the tone.
7. CLEAN CHANNEL - MIDDLE: Adjusts the amount
of mid-range frequencies as desired in the clean
0
VOLUM
MID
CUT
10
E
4
5
channel. Turning the middle control clockwise will
increase the amount of warmth. Counterclockwise
settings create a more hollow, mid-scooped tone.
8. 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.
9. CHANNEL SELECT: Push switch selects between the
clean and overdrive channels. Activated LED lights
indicate which channel is in use.
10. OVERDRIVE – VOLUME 2: Controls the overall
volume of the high gain overdrive channel.
10
0
TREBLE
6
10
0
MIDDLE
7
0
BASS
8
10
LS-100 REAR PANEL CONTROLS
EFFECTS LOOP
24
SEND
10
0
LEVEL
25
25. EFFECTS – SEND LEVEL: Controls the signal level
being sent to an effects unit.
26. FOOTSWITCH –REVERB: Connects footswitch to
turn the reverb on/off
27. FOOTSWITCH – GAIN AND CHANNEL
SWITCH: Switch between Gain 1 and Gain 2 in
RETURN
10
0
LEVEL
22
22. EFFECTS – RETURN LEVEL: Controls the level of
the returning signal from an effects unit.
23. EFFECTS – RETURN JACK: Connects the LS-100 to
the output of an effects unit.
24. EFFECTS - SEND JACK: Connects the LS-100 to
the input of an effects unit.
23
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
FOOTSWITCH
REVERB
CHANNEL
26
GAIN
27
WARNING: To reduce the risk of electrical shock, do not expose this
equipment to rain or moisture. There are no user serviceable parts inside.
Refer all servicing to authorized personnel.
CAUTION: To reduce the risk of fire replace only with the same type of fuse.
RECORD OUT
10
0
LEVEL
28
the Overdrive channel. Also switches between clean
and overdrive channel.
28. RECORD OUT – LEVEL: Controls the signal level
being sent to the PA or recording console.
29. RECORD OUT – SPEAKER SIMULATED: This
output signal is pre-equalized to simulate the sound
critical midrange tone in the overdrive channels.
Adjusts from “classic” midrange punch to “scooped
metal” madness.
14. OVERDRIVE CHANNEL – GAIN SWITCH 1:
Activates the CONTOUR control for Gain 1.
15. OVERDRIVE CHANNEL – TREBLE: Adjusts the
amount of high frequency boost or cut as desired in
OVERDRIVE CHANNELS
CONTOUR
2
0
CONTOU
13
10
R
GAIN 1
14
TREBLE
10
0
TREBLE
15
MIDDLE
10
0
MIDDLE
16
BASS
0
BASS
17
the overdrive channel. Turning this control clockwise
adds clarity to your sound.
16. OVERDRIVE CHANNEL – MIDDLE: Adjusts the
amount of mid-range frequencies as desired in the
overdrive channel. Similar to the Clean channel
function, the Overdrive channel Middle control adds
body and punch to your sound.
17. 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.
10
GAIN 2
10
0
GAIN 2
18
GAI
SELECT
19
N
GAIN 1
10
0
GAIN
20
INPUT
INPUT
1
21
18. OVERDRIVE CHANNEL – GAIN 2: Adjusts the
amount of distortion in Gain 1. (Activated LED
indicates in use).
19. OVERDRIVE CHANNEL – GAIN SWITCH: Push
switch selects between Gain 1 and Gain 2 controls.
Activated LED lights indicate which channel is in use.
20. OVERDRIVE CHANNEL – GAIN 1: Adjusts the
amount of distortion in Gain 1. (Activated LED
indicates in use).
21. INPUT CONNECTOR: Plug your guitar in here.
Always use a high quality, shielded cable. Poor cables
will rob you of tone and can cause increased noise.
LS-100 REAR PANEL CONTROLS
SPEAKER OUTPUTS
of a speaker cabinet. It allows you to connect directly
to your console without the use of a microphone.
30. LOUDSPEAKER OUTPUTS: Connects the LS-100 to
the speaker cabinets such as the LS-412A or LS-412B.
NOTE: Be sure the speakers are plugged in before
attempting to operate the amplifier. Always use a
high quality, heavy duty, unshielded speaker cable.
31. AC SELECT: 115/230 volt switch for use in different
countries. This switch must be properly set or severe
damage will result.
32. AC INLET & PRIMARY FUSE: Connects AC
powercord and houses primary fuse. Always use
correct value as indicated on amp panel chart.
Setting the effects loop send and return controls:
1) Adjust the amp to normal playing volume with nothing plugged into the effects loop.
2) Plug an effects unit in and set the return control to 12:00
3) Adjust the send control so that the volume is about the same as when the effects were not plugged. Verify this by unplugging
the effect unit to compare.
4) If, when the effects are plugged in, you notice a loss of tone or distortion, readjust the send control until the tone loss im
proves. Then readjust the return level control to, once again, match the volume before the effects were connected.
RECORD OUT:
This output provides a pre-equalized signal that closely mimics the sound of a 4 x12” cabinet. Instead of placing a microphone in
front of the speakers, simply connect this output directly into your recording or PA console. Now you have a consistent, repeatable
signal that is no longer dependent on the precise placement of a microphone.
SPECIAL NOTE: If when attempting to use the recording out, you notice excessive hum (even with the LS-100 Master volume off),
this is an indication of a “ground loop”. The solution is to use a direct box with a ground lift switch between the console input and
the LS-100 recording output.
Limited Warranty
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 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. 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 voicecoils, 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 (5) five year warranty 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. NO
WARRANTY IS OFFERED ON HIGH-FREQUENCY DEVICES IN B-52 SYSTEMS WITH A BI-AMP SWITCH OPTION. The (5)
five year warranty on high-frequency 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.
PRO-AUDIO AMPLIFIERS: E.T.I. Sound Systems, Inc. warrants the original purchaser that B-52 amplifiers will
be free from defects in material and workmanship for a period of (2) two years from the original purchase date. A
dated sales receipt will establish coverage under this warranty. This warranty will automatically terminate (2) years
after the original retail sales date. This (2) two-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.
GUITAR AMPLIFIERS - SOLID-STATE: E.T.I. Sound Systems, Inc. warrants the original purchaser that B-52
solid-state amplifiers will be free from defects in material and workmanship for a period of (5) FIVE years from
the original purchase date. 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.
TUBES: E.T.I. Sound Systems, Inc. warrants the original purchaser that amplifier tubes used in B-52 Stealth Series
tubes will be free from defects in material and workmanship for a period of 90 DAYS from the original date of purchase. A dated sales receipt will establish coverage under this warranty. This warranty 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 Return Authorization Number must
be 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. E.T.I. is not 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: In no event will E.T.I. be 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 warrant or product questions you
may have. Please call 323-277-4100 (9:00AM to 4:00PM Pacific Standard Time).