User`s manual | Behringer KT108 Musical Instrument User Manual

User’s manual
Version 1.0 March 2005
1) Read these instructions.
2) Keep these instructions.
3) Heed all warnings.
4) Follow all instructions.
To reduce the risk of electric shock, do not remove
the top cover (or the rear section). No user
serviceable parts inside; refer servicing to qualified
To reduce the risk of fire or electric shock, do not
expose this appliance to rain and moisture. The
apparatus shall not be exposed to dripping or
splashing and no objects filled with liquids, such
as vases, shall be placed on the apparatus.
This symbol, wherever it appears, alerts you to the
presence of uninsulated dangerous voltage inside
the enclosure—voltage that may be sufficient to
constitute a risk of shock.
This symbol, wherever it appears, alerts you to
important operating and maintenance instructions
in the accompanying literature. Please read the
5) Do not use this apparatus near water.
6) Clean only with dry cloth.
7) Do not block any ventilation openings. Install in
accordance with the manufacturer’s instructions.
8) Do not install near any heat sources such as radiators,
heat registers, stoves, or other apparatus (including
amplifiers) that produce heat.
9) Do not defeat the safety purpose of the polarized 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 are provided for your safety. If
the provided plug does not fit into your outlet, consult
an electrician for replacement of the obsolete outlet.
10) Protect the power cord from being walked on or
pinched particularly at plugs, convenience receptacles,
and the point where they exit from the apparatus.
11) Only use attachments/accessories specified by the
12) Use only with the cart, stand, tripod, bracket, or table
specified by the manufacturer, or sold with the
apparatus. When a cart is used, use caution when moving
the cart/apparatus combination to avoid injury from
13) Unplug this apparatus during lightning storms or
when unused for long periods of time.
14) Refer all servicing to qualified service personnel.
Servicing is required when the apparatus has been
damaged in any way, such as power supply cord or plug
is damaged, liquid has been spilled or objects have fallen
into the apparatus, the apparatus has been exposed to
rain or moisture, does not operate normally, or has been
15) CAUTION - These service instructions are for use by
qualified service personnel only. To reduce the risk of
electric shock do not perform any servicing other than
that contained in the operation instructions unless you
are qualified to do so.
Ultracompact 15-Watt Keyboard Amplifier with VTC-Technology
s Powerful 20-Watt, 8" dual-cone speaker for wide frequency response
s 2 instrument inputs with separate volume control for each channel
s VTC Virtual Tube Circuitry tube-like sound
s Dedicated 3-band EQ
s CD input allows you to play along to your favorite music
s Separate headphone output—perfect for quiet practicing
s High-quality components and exceptionally rugged construction ensure long life
s Conceived and designed by BEHRINGER Germany
s Extremely versatile 2-channel keyboard amplifier
Dear musician,
Congratulations and
thank you very much for
purchasing the KT108
BEHRINGER keyboard
is a truly versatile
keyboard amp that will be
loads of fun to use.
Had anybody told you a
few years ago that one
day you’d be able to buy
a keyboard amp with
authentic tube sound
simulation at such an
unbeatable price, you
would have probably
called him nuts.
1. INTRODUCTION ......................................................... 4
1.1 Before you get started ................................................. 5
1.1.1 Shipment ............................................................. 5
1.1.2 Initial operation .................................................... 5
1.1.3 Online registration .............................................. 5
2. WIRING TIPS .............................................................. 5
3. CONTROL ELEMENTS ............................................... 6
4. AUDIO CONNECTIONS ............................................... 7
5. SPECIFICATIONS ....................................................... 7
6. WARRANTY ................................................................ 8
But I wanted this amp to become reality, and now we’ve actually
made it! With our ULTRATONE KT108 you can now follow in the
footsteps of all the big keyboard legends. Simply unpack it, plug
it in and you’re ready to go! The ULTRATONE KT108 gives you
everything your heart desires.
What we really wanted was to give you a truly high-quality
keyboard amp. Believe me: With all those years of experience
under our belt, we know what an amp needs to put up with. No
matter how often you practice or how many sessions you have
with your friends: when it comes to quality and sound, your
ULTRATONE KT108 will give you years and years of pure
Now, just in case you’re wondering how we can offer such a
high-quality keyboard amp at such an unbelievably low price...
the answer is totally simple: it’s thanks to you! Many satisfied
customers means large volumes of units sold. Many units sold
means better purchase prices for components, and so on. So, we
just passed this price advantage on to you. It‘s only fair, isn’t it?
Enough talk now. One day, when you‘re one of those legendary
keyboard players yourself, we hope you‘ll say that your first
real keyboard amp was a BEHRINGER. In that case, you have
made a dream come true for us, too.
We wish you lots of success!
Thank you very much,
Congratulations! By purchasing the KT108, you have obtained
a first-class keyboard amplifier that offers you the authentic
tube sound simulation in an amazingly compact housing. The
two instrument inputs and the additional CD player input make
the ULTRATONE KT108 a truly flexible practice amp that will be
tons of fun to use, no matter where or when you use it.
VTC Virtual Tube Circuitry
The VTC Virtual Tube Circuitry was specially developed to
lend the keyboard sound the unique character of classic tube
Jam it up!
With its CD player input, your KT108 is the ultimate practice
amp, because it couldn’t be easier to play along to your favorite
music. If you don’t want anybody listening to what you’re playing,
or simply wish to avoid disturbing the neighbors, just use your
headphones. The BEHRINGER HPS3000 is ideal just for that.
A companion for life!
The electronic components in your ULTRATONE KT108 have
been built into a robust metal enclosure for maximum protection.
The cabinet is made of high-grade wood covered with durable
vinyl. The KT108 will never let you down, even when the going
gets tough.
Please read the manual carefully and keep it around
for future reference.
Uli Behringer
High volume levels can damage your hearing or your
headphones. Please turn the volume control to zero
(all the way to the left) before you power up the amp.
Always make sure you use appropriate volume levels.
1.1 Before you get started
1.1.1 Shipment
Your KT108 was carefully packed at the factory, and the
packaging was designed to protect the unit from rough handling.
Nevertheless, we recommend that you carefully examine the
packaging and its contents for any signs of physical damage
that may have occurred during transit.
If the unit is damaged, please do NOT return it to
BEHRINGER. Instead, notify your dealer and the
shipping company immediately. Otherwise, claims
for damage or replacement may not be honored.
Always use the original packing carton to prevent
damage during storage or transport.
Make sure that no children are left unsupervised
with the KT108 or its packaging.
Please ensure proper disposal of all packing
1.1.2 Initial operation
Be sure that there is enough space around the unit for cooling.
To avoid overheating, please do not place the ULTRATONE near
radiators and other equipment emanating heat.
Please keep in mind that all the equipment has to
be grounded at all times. For your own protection,
never change or disable the grounding on your
equipment or on the cables! The unit shall always
be connected to the mains socket outlet with a
protective earthing connection.
Fig. 2.1: Example of a setup using the ULTRATONE KT108
Fig. 2.2 shows a recommended setup for amplifying the vintage
sound of your KT108 using a sound reinforcement system of
any size. This way, you can also use your amp for playing live or
for rehearsals with your band.
1.1.3 Online registration
Please do remember to register your new BEHRINGER
equipment right after your purchase by visiting (alternatively and
kindly read the terms and conditions of our warranty carefully.
Should your BEHRINGER product malfunction, our goal is to
have it repaired as quickly as possible. To arrange for warranty
service, please contact the retailer from whom the equipment
was purchased. Should your BEHRINGER dealer not be located
in your vicinity, you may directly contact one of our subsidiaries.
Corresponding contact information is included in the original
equipment packaging (Global Contact Information/European
Contact Information). Should your country not be listed, please
contact the distributor nearest you. A list of distributors can be
found in the support area of our website (
Registering your purchase and equipment with us helps us
process your repair claims quicker and more efficiently.
Thank you for your cooperation!
Figures 2.1 and 2.2 show you how to connect your keyboard
to the amplifier.
If you want to use an effects unit (for example, the BEHRINGER
X V-AMP) to experiment with some out-of-the-ordinary sounds,
you can connect your keyboard directly to the input of the effects
processor. Then, connect a second cable from the effects output
to the input on your keyboard amp.
The built-in loudspeaker is disabled automatically
when you plug in the headphones
Fig. 2.2: Live setup
Fig. 3.1: Control elements on the front panel
Connect your keyboard to the INST. 1 INPUT connector,
using a standard instrument cable equipped with 1/4" TS
The second instrument input (INST. 2 INPUT) can of course
be used to connect a second keyboard or a drum computer.
Please note: The POWER switch does not disconnect
the unit from the mains. Unplug the power cord
when you don’t want to use the unit for some time.
The volume of both instrument channels can be adjusted
using the INST. 1 VOL and INST. 2 VOL control.
Use the CD INPUT to connect the output of your CD player,
tape deck, CD or MD walkman. This way you can play
along to music or keyboard tutorial CDs.
This connector is a 1/4" TRS jack. If your CD player is
equipped with cinch outputs, you’ll need an adapter cable,
which you can buy at your local music shop. Illustration 4.3
in chapter 4. “AUDIO CONNECTIONS” shows you what
kind of adapter to buy. You can also use a mono cable (fig.
4.4). This will not damage your CD player or keyboard amp.
Fig.: 3.2 Rear panel: serial number
The LOW control allows you to boost or cut the lowfrequency range.
With the MID control you can boost or cut the mid-range
The HIGH control adjusts the high-frequency range.
With all the settings the following applies: Adjusting
the tone settings on your KT108 lets you refine the
sound of your keyboard; for example, you can add
more depth to a bass sound, or you can bring out
the strings upfront by increasing the mids.
Sometimes more neutral settings are desired in
order to preserve the character of the original
The HEADPHONES jack is for headphones. When you
plug in your headphones, the built-in loudspeaker is muted.
The headphone signal can also be routed to a mixing
console or sound reinforcement system. Connect
the headphones output on your KT108 to the line
input (LINE IN) on the console (for example,
mono cable for this application.
Some headphones produce distortion if the volume
level is too high. Please cut back the volume control
until the distortion disappears.
Use the POWER switch to switch on your KT108. The
POWER switch should be set to “Off” before you connect
your keyboard amp to the mains.
All of your amp’s inputs and outputs are laid out as 1/4"
connectors. More information about the connectors can be found
in chapter 5. “SPECIFICATIONS.”
Please keep in mind that all the equipment has to
be grounded at all times. For your own protection,
never change or disable the grounding on your
equipment or on the cables! The unit shall always
be connected to the mains socket outlet with a
protective earthing connection.
Fig. 4.4: Mono adapter cable
Keyboard input 1/2
CD input
Fig. 4.1: 1/4" TS plug for the INSTRUMENT INPUT (mono)
1/4" TS mono connectors
1/4" TRS stereo connector
Headphones output
1/4" TRS stereo connector
Power amp output
15 Watts
Power rating
Mains voltage
(H x W x D)
Fig. 4.2: 1/4" TRS plug for headphones and CD input
8" dual-cone full-range
20 Watts
120 V~, 60 Hz
230 V~, 50 Hz
230 V~, 50 Hz
100 V~, 50 - 60 Hz
approx. 322 mm (13 1/8")
x 357 mm (14 1/16")
x 162 mm (6 3/8")
approx. 5 kg (10 lbs.)
Fig. 4.3: Stereo adapter cable
BEHRINGER is constantly striving to maintain the highest professional standards. As a
result of these efforts, modifications may be made from time to time to existing products without
prior notice. Specifications and appearance may differ from those listed or shown.
1. This warranty does not exclude or limit the buyer’s statutory
rights provided by national law, in particular, any such rights
against the seller that arise from a legally effective purchase
2. The warranty regulations mentioned herein are applicable
unless they constitute an infringement of national warranty law.
Please do remember to register your new BEHRINGER
equipment right after your purchase by visiting (alternatively and
kindly read the terms and conditions of our warranty carefully.
Registering your purchase and equipment with us helps us
process your repair claims quicker and more efficiently. Thank
you for your cooperation!
1. BEHRINGER (BEHRINGER International GmbH including all
BEHRINGER subsidiaries listed on the enclosed page, except
BEHRINGER Japan) warrants the mechanical and electronic
components of this product to be free of defects in material and
workmanship for a period of one (1) year* from the original date
of purchase, in accordance with the warranty regulations
described below. If the product shows any defects within the
specified warranty period that are not excluded from this
warranty as described under § 5, BEHRINGER shall, at its
discretion, either replace or repair the product using suitable
new or reconditioned parts. In the case that other parts are used
which constitute an improvement, BEHRINGER may, at its
discretion, charge the customer for the additional cost of these
2. If the warranty claim proves to be justified, the product will
be returned to the user freight prepaid.
3. Warranty claims other than those indicated above are
expressly excluded.
1. To obtain warranty service, the buyer (or his authorized
dealer) must call BEHRINGER (see enclosed list) during normal
business hours BEFORE returning the product. All inquiries must
be accompanied by a description of the problem. BEHRINGER
will then issue a return authorization number.
2. Subsequently, the product must be returned in its original
shipping carton, together with the return authorization number to
the address indicated by BEHRINGER.
3. Shipments without freight prepaid will not be accepted.
1. Warranty services will be furnished only if the product is
accompanied by a copy of the original retail dealer’s invoice.
Any product deemed eligible for repair or replacement under the
terms of this warranty will be repaired or replaced.
2. If the product needs to be modified or adapted in order to
comply with applicable technical or safety standards on a national
or local level, in any country which is not the country for which
the product was originally developed and manufactured, this
modification/adaptation shall not be considered a defect in
materials or workmanship. The warranty does not cover any
such modification/adaptation, irrespective of whether it was
carried out properly or not. Under the terms of this warranty,
BEHRINGER shall not be held responsible for any cost resulting
from such a modification/adaptation.
3. Free inspections and maintenance/repair work are expressly
excluded from this warranty, in particular, if caused by improper
handling of the product by the user. This also applies to defects
caused by normal wear and tear, in particular, of faders,
crossfaders, potentiometers, keys/buttons, tubes, guitar strings,
illuminants and similar parts.
4. Damages/defects caused by the following conditions are
not covered by this warranty:
s improper handling, neglect or failure to operate the unit in
compliance with the instructions given in BEHRINGER user
or service manuals.
s connection or operation of the unit in any way that does not
comply with the technical or safety regulations applicable in
the country where the product is used.
s damages/defects caused by force majeure or any other
condition that is beyond the control of BEHRINGER.
5. Any repair or opening of the unit carried out by unauthorized
personnel (user included) will void the warranty.
6. If an inspection of the product by BEHRINGER shows that
the defect in question is not covered by the warranty, the
inspection costs are payable by the customer.
7. Products which do not meet the terms of this warranty will
be repaired exclusively at the buyer’s expense. BEHRINGER will
inform the buyer of any such circumstance. If the buyer fails to
submit a written repair order within 6 weeks after notification,
BEHRINGER will return the unit C.O.D. with a separate invoice
for freight and packing. Such costs will also be invoiced
separately when the buyer has sent in a written repair order.
This warranty is extended exclusively to the original buyer
(customer of retail dealer) and is not transferable to anyone
who may subsequently purchase this product. No other person
(retail dealer, etc.) shall be entitled to give any warranty promise
on behalf of BEHRINGER.
Failure of BEHRINGER to provide proper warranty service shall
not entitle the buyer to claim (consequential) damages. In no
event shall the liability of BEHRINGER exceed the invoiced value
of the product.
* Customers in the European Union please contact BEHRINGER
Germany Support for further details.
Technical specifications and appearance subject to change without notice. The information contained herein is correct at the time of
printing. The names of companies, institutions or publications pictured or mentioned and their respective logos are registered
trademarks of their respective owners. Their use neither constitutes a claim of the trademarks by BEHRINGER® nor affiliation of the
trademark owners with BEHRINGER®. BEHRINGER® accepts no liability for any loss which may be suffered by any person who relies
either wholly or in part upon any description, photograph or statement contained herein. Colours and specification may vary slightly
from product. Products are sold through our authorised dealers only. Distributors and dealers are not agents of BEHRINGER ® and
have absolutely no authority to bind BEHRINGER® by any express or implied undertaking or representation. No part of this manual may
be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying and recording of any
kind, for any purpose, without the express written permission of BEHRINGER Spezielle Studiotechnik GmbH. BEHRINGER ® is a
registered trademark.
ALL RIGHTS RESERVED. © 2005 BEHRINGER Spezielle Studiotechnik GmbH,
Hanns-Martin-Schleyer-Str. 36-38, 47877 Willich-Münchheide II, Germany.
Tel. +49 2154 9206 0, Fax +49 2154 9206 4903
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