Behringer Ultrabass BT108 User manual

Version 1.0 January 2005
Users manual
ULTRABASS BT108

2
ULTRABASS BT108
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
manual.
IMPORTANT SAFETY INSTRUCTIONS
CAUTION: 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
personnel.
WARNING: 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.
DETAILED SAFETY INSTRUCTIONS:
1) Read these instructi ns.
2) Keep these instructi ns.
3) Heed all warnings.
4) F ll w all instructi ns.
5) D n t use this apparatus near water.
6) Clean nly with dry cl th.
7) D n t bl ck any ventilati n penings. Install in
acc rdance with the manufacturers instructi ns.
8) D n t install near any heat s urces such as radiat rs,
heat registers, st ves, r ther apparatus (including
amplifiers) that pr duce heat.
9) D n t defeat the safety purp se f the p larized r
gr unding-type plug. A p larized plug has tw blades
with ne wider than the ther. A gr unding type plug
has tw blades and a third gr unding pr ng. The wide
blade r the third pr ng are pr vided f r y ur safety. If
the pr vided plug d es n t fit int y ur utlet, c nsult
an electrician f r replacement f the bs lete utlet.
10) Pr tect the p wer c rd fr m being walked n r
pinched particularly at plugs, c nvenience receptacles,
and the p int where they exit fr m the apparatus.
11) Only use attachments/access ries specified by the
manufacturer.
12) Use nly with the cart, stand, trip d, bracket, r table
specified by the manufacturer, r s ld with the
apparatus. When a cart is used, use cauti n when m ving
the cart/apparatus c mbinati n t av id injury fr m
tip- ver.
13) Unplug this apparatus during lightning st rms r
when unused f r l ng peri ds f time.
14) Refer all servicing t qualified service pers nnel.
Servicing is required when the apparatus has been
damaged in any way, such as p wer supply c rd r plug
is damaged, liquid has been spilled r bjects have fallen
int the apparatus, the apparatus has been exp sed t
rain r m isture, d es n t perate n rmally, r has been
dr pped.
15) CAUTION - These service instructi ns are f r use by
qualified service pers nnel nly. T reduce the risk f
electric sh ck d n t perf rm any servicing ther than
that c ntained in the perati n instructi ns unless y u
are qualified t d s .

3
ULTRABASS BT108
BT108
ULTRABASS
Ultra-Compact 15-Watt Bass Amp with VTC-Technology
sExtremely versatile bass amplifier
sPowerful 20-Watt 8" speaker
sVTC Virtual Tube Circuitry for tube-like sound
sDedicated 4-band EQ for ultimate sound control and flexibility
sCD input allows you to play along to your favorite music
sSeparate headphone output  perfect for quiet practicing
sHigh-quality components and exceptionally rugged construction ensure long life
sConceived and designed by BEHRINGER Germany

4
ULTRABASS BT108
1. INTRODUCTION
Congratulations! By purchasing the BT108, you have obtained
a first-class bass amplifier that offers you the authentic tube-like
sound in an amazingly compact housing.
The ULTRABASS BT108 amplifier was designed specifically
for practicing. You can do the finishing touches using the precise
4-band EQ. With its well-balanced basic sound it gives you what
is most important when playing: lots of fun!
VTC Virtual Tube Circuitry
The VTC Virtual Tube Circuitry was specially developed to
lend the bass sound the unique character of classic tube amps.
Jam it up!
With its CD player input, your BT108 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 c mpani n f r life!
The electronic components in your ULTRABASS BT108 have
been built into a robust metal enclosure for maximum protection.
The cabinet is made of high-grade wood covered with durable
vinyl. The BT108 will never let you down, even when the going
gets tough.
+Please read the manual carefully and keep it ar und
f r future reference.
ATTENTION!
+High v lume levels can damage y ur hearing r y ur
headph nes. Please turn d wn the VOLUME c ntr l
t zer (all the way t the left) bef re y u p wer up
the amp. Always make sure y u use appr priate
v lume levels.
1.1 Before you get started
1.1.1 Shipment
Your BT108 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.
FOREWORD
Dear musician,
Congratulations and
thank you very much for
purchasing the BT108,
the newest addition to
BEHRINGERs range of
bass amplification
products.
The ULTRABASS BT108
offers the latest in bass
amps, and is guaranteed
to be an inspiring
companion wherever
music takes you.
Had anybody told you a
few years ago that one
day youd be able to buy
a bass amp with
authentic tube sound at
such an unbeatable
price, you would have
probably called him nuts. But I wanted this amp to become reality,
and now weve actually made it! With our ULTRABASS BT108
you can now follow in the footsteps of all the big bass legends.
Simply unpack it, plug it in and youre ready to go! The ULTRABASS
BT108 gives you everything your heart desires.
What we really wanted was to give you a truly high-quality bass
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
ULTRABASS BT108 will give you years and years of pure
enjoyment.
Now, just in case youre wondering how we can offer such a
high-quality bass 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
bassists yourself, we hope youll say that your first real bass
amp was a BEHRINGER. In that case, you have made a dream
come true for us, too.
Thank you very much,
Uli Behringer
TABLE OF CONTENTS
1. INTRODUCTION ......................................................... 4
1.1 Before you get started ................................................... 4
1.1.1 Shipment .............................................................. 4
1.1.2 Initial operation ..................................................... 5
1.1.3 Online registration ............................................... 5
2. WIRING TIPS .............................................................. 5
3. CONTROL ELEMENTS ............................................... 6
4. AUDIO CONNECTIONS ............................................... 6
5. SPECI ICATIONS ....................................................... 7
6. WARRANTY ................................................................ 8
1. INTRODUCTION

5
ULTRABASS BT108
+If the unit is damaged, please d NOT return it t
BEHRINGER. Instead, n tify y ur dealer and the
shipping c mpany immediately. Otherwise, claims
f r damage r replacement may n t be h n red.
+Always use the riginal packing cart n t prevent
damage during st rage r transp rt.
+Make sure that n children are left unsupervised
with the BT108 r its packaging.
+Please ensure pr per disp sal f all packing materials.
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 ULTRABASS near
radiators and other equipment emanating heat.
+Please keep in mind that all the equipment has t
be gr unded at all times. F r y ur wn pr tecti n,
never change r disable the gr unding n y ur
equipment r n the cables! The unit shall always
be c nnected t the mains s cket utlet with a
pr tective earthing c nnecti n.
1.1.3 Online registration
Please do remember to register your new BEHRINGER
equipment right after your purchase by visiting
www.behringer.com (alternatively www.behringer.de) 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 (www.behringer.com/).
Registering your purchase and equipment with us helps us
process your repair claims quicker and more efficiently.
Thank you for your cooperation!
2. WIRING TIPS
Figures 2.1 and 2.2 show you how to connect your bass to
the amplifier.
If you want to use an effects unit (for example, the BEHRINGER
X V-AMP PRO) to experiment with some out-of-the-ordinary
sounds, you can connect your bass directly to the input of the
unit. Then, connect a second cable from the effects output to the
input on your bass amp.
If you have an electronic tuner, please be sure to insert it pre
effects device, so that the tuner only receives a dry signal without
effects components.
X V-AMP PRO: no additional tuner required.
+The built-in l udspeaker is disabled aut matically
when y u plug in the headph nes.
Fig. 2.1: Example of a setup using the ULTRABASS BT108
Fig. 2.2 shows a recommended setup for amplifying the sound
of your BT108 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.
Fig. 2.2: Li e setup
2. WIRING TIPS

6
ULTRABASS BT108
3. CONTROL ELEMENTS
Fig. 3.1: Upper side: Control elements
Connect your bass to the INST. INPUT jack, using a
standard cable with a 1/4" TS connector.
Use the VOLUME control to adjust the volume of the
instrument channel. To change the instrument-to-CD volume
ratio, use your instruments volume 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 bass guitar 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 bass amp.
The LOW control allows you to boost or cut the low-
frequency range.
Using the LOW MID control you can boost or cut the lower
mids.
The HIGH MID control allows you to boost or cut the upper
mids.
The HIGH control governs the high-frequency range to
give your bass a more cutting sound.
The HEADPHONES jack is for headphones. When you
plug in your headphones, the built-in loudspeaker is muted.
+The headph ne signal can als be r uted t a mixing
c ns le r s und reinf rcement system. C nnect
the headph nes utput n y ur BT108 t the line
input (LINE IN) n the c ns le (f r example,
BEHRINGER EURORACK UB1222FX-PRO). Please use a
m n cable f r this applicati n.
+S me headph nes pr duce dist rti n if the v lume
level is t high. Please cut back the VOLUME c ntr l
until the dist rti n disappears.
Use the POWER switch to switch on your BT108. The
POWER switch should be set to Off before you connect
your bass amp to the mains.
+Please n te: The POWER switch d es n t disc nnect
the unit fr m the mains. Unplug the p wer c rd
when y u d nt want t use the unit f r s me time.
Fig. 3.2 Rear iew: Serial number
SERIAL NUMBER.
No matter which way you adjust the controls on your bass
amp: the sound of your bass also has some influence on the
overall sound. Therefore we may only give you a few tips to get
you started.
+M st bass guitars s und best when their t ne and
v lume c ntr ls are turned up as much as p ssible.
Experiment with the controls to find out how you can modify
the sound to your liking. Experienced bassists write down their
favorite settings or attach stickies underneath the controls.
4. AUDIO CONNECTIONS
Your BEHRINGER ULTRABASS BT108 features 1/4" connectors
on inputs and outputs. More detailed information can be found in
chapter 5, SPECIFICATIONS.
+Please keep in mind that all the equipment has t
be gr unded at all times. F r y ur wn pr tecti n,
never change r disable the gr unding n y ur
equipment r n the cables! The unit shall always
be c nnected t the mains s cket utlet with a
pr tective earthing c nnecti n.
Fig. 4.1: 1/4" mono connector (TS) for the INST. INPUT
4. AUDIO CONNECTIONS

7
ULTRABASS BT108
Fig. 4.2: 1/4" stereo connector (TRS) for headphones or
CDINPUT
Fig. 4.3: Stereo adapter cable
Fig. 4.4: Mono adapter cable
5. SPECIFICATIONS
INPUTS
Instrument input
Connector 1/4" TS mono connector
CD or audio input
Connector 1/4" TRS stereo connector
OUTPUTS
Headphones output
Connector 1/4" TRS stereo connector
SYSTEM DATA
Output stage power 15 Watts
LOUDSPEAKER
Type 8" special custom-made
loudspeaker
Impedance 4 Ω
Power rating 20 Watts
POWER SUPPLY
Mains voltage USA/Canada 120 V~, 60 Hz
U.K./Australia 230 V~, 50 Hz
China 220 V~, 50 Hz
Europe 230 V~, 50 Hz
Japan 100 V~, 50 - 60 Hz
DIMENSIONS/WEIGHT
Dimensions (H x W x D) approx. 13 1/8" x 14 1/16" x 6 3/8"
(322 mm x 357 mm x 162 mm)
Weight approx. 5.6 kg (11 lbs. 3 oz.)
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 e isting products without
prior notice. Specifications and appearance may differ from those listed or shown.
5. SPECIFICATIONS

8
ULTRABASS BT108
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. [phone], Fax [phone]
6. WARRANTY
6. WARRANTY
§ 1 OTHER WARRANTY RIGHTS AND NATIONAL LAW
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
contract.
2. The warranty regulations mentioned herein are applicable
unless they constitute an infringement of national warranty law.
§ 2 ONLINE REGISTRATION
Please do remember to register your new BEHRINGER
equipment right after your purchase by visiting
www.behringer.com (alternatively www.behringer.de) 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!
§ 3 WARRANTY
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
parts.
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.
§ 4 RETURN AUTHORIZATION NUMBER
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.
§ 5 WARRANTY REGULATIONS
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:
simproper handling, neglect or failure to operate the unit in
compliance with the instructions given in BEHRINGER user
or service manuals.
sconnection 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.
sdamages/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.
§ 6 WARRANTY TRANSFERABILITY
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.
§ 7 CLAIM FOR DAMAGES
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.