Behringer Musical Instrument Amplifier BT108 User Manual

User’s manual  
Version 1ꢀ0 January 2005  
 
ULTRABASS BT108  
ULTRABASS  
Ultra-Compact 15-Watt Bass Amp with VTC-Technology  
s Extremely versatile bass amplifier  
s Powerful 20-Watt, 8" speaker  
s VTC Virtual Tube Circuitry for tube-like sound  
s Dedicated 4-band EQ for ultimate sound control and flexibility  
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  
3
 
ULTRABASS BT108  
FOREWORD  
TABLE OF CONTENTS  
Dear musician,  
1ꢀ INTRODUCTION ꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀ 4  
Congratulations and  
1ꢀ1 Before you get started ꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀ 4  
1ꢀ1ꢀ1 Shipment ꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀ 4  
1ꢀ1ꢀ2 Initial operation ꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀ 5  
1ꢀ1ꢀ3 Online registration ꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀ 5  
thank you very much for  
purchasing the BT108,  
the newest addition to  
BEHRINGER’s range of  
bass  
amplification  
productsꢀ  
2ꢀ WIRING TIPS ꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀ5  
3ꢀ CONTROL ELEMENTS ꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀ6  
4ꢀ AUDIO CONNECTIONSꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀ6  
5ꢀ SPECIFICATIONS ꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀ7  
6ꢀ WARRANTY ꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀ8  
The ULTRABASS BT108  
offers the latest in bass  
amps, and is guaranteed  
to be an inspiring  
companion wherever  
music takes youꢀ  
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 nutsꢀ 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 legendsꢀ  
Simply unpack it, plug it in and you’re ready to go! The ULTRABASS  
BT108 gives you everything your heart desiresꢀ  
1ꢀ 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 housingꢀ  
What we really wanted was to give you a truly high-quality bass  
ampꢀ Believe me: With all those years of experience under our  
belt, we know what an amp needs to put up withꢀ 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  
enjoymentꢀ  
The ULTRABASS BT108 amplifier was designed specifically  
for practicingꢀ You can do the finishing touches using the precise  
4-band EQꢀ 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 ampsꢀ  
Now, just in case you’re wondering how we can offer such a  
high-quality bass amp at such an unbelievably low priceꢀꢀꢀ the  
answer is totally simple: it’s thanks to you! Many satisfied  
customers means large volumes of units soldꢀ Many units sold  
means better purchase prices for components, and so onꢀ So,  
we just passed this price advantage on to youꢀ It’s only fair, isn’t  
it?  
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  
musicꢀ If you don’t want anybody listening to what you’re playing,  
or simply wish to avoid disturbing the neighbors, just use your  
headphonesꢀ The BEHRINGER HPS3000 is ideal just for thatꢀ  
Enough talk nowꢀ One day, when you’re one of those legendary  
bassists yourself, we hope you’ll say that your first real bass  
amp was a BEHRINGERꢀ In that case, you have made a dream  
come true for us, tooꢀ  
A companion for life!  
The electronic components in your ULTRABASS BT108 have  
been built into a robust metal enclosure for maximum protectionꢀ  
The cabinet is made of high-grade wood covered with durable  
vinylꢀ The BT108 will never let you down, even when the going  
gets toughꢀ  
Thank you very much,  
+
Please read the manual carefully and keep it around  
for future reference!  
ATTENTION!  
Uli Behringer  
+
High volume levels can damage your hearing or your  
headphones! Please turn down 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!  
1ꢀ1 Before you get started  
1ꢀ1ꢀ1 Shipment  
Your BT108 was carefully packed at the factory, and the  
packaging was designed to protect the unit from rough handlingꢀ  
Nevertheless, we recommend that you carefully examine the  
packaging and its contents for any signs of physical damage  
that may have occurred during transitꢀ  
4
1ꢀ INTRODUCTION  
 
ULTRABASS BT108  
+
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 BT108 or its packaging!  
Please ensure proper disposal of all packing materials!  
1ꢀ1ꢀ2 Initial operation  
Be sure that there is enough space around the unit for coolingꢀ  
To avoid overheating, please do not place the ULTRABASS near  
radiators and other equipment emanating heatꢀ  
+
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!  
1ꢀ1ꢀ3 Online registration  
Please do remember to register your new BEHRINGER  
equipment right after your purchase by visiting  
wwwꢀbehringerꢀcom (alternatively wwwꢀbehringerꢀde) and  
kindly read the terms and conditions of our warranty carefullyꢀ  
Figꢀ 2ꢀ1: Example of a setup using the ULTRABASS BT108  
Figꢀ 2ꢀ2 shows a recommended setup for amplifying the sound  
of your BT108 using a sound reinforcement system of any sizeꢀ  
This way, you can also use your amp for playing live or for  
rehearsals with your bandꢀ  
Should your BEHRINGER product malfunction, our goal is to  
have it repaired as quickly as possibleꢀ To arrange for warranty  
service, please contact the retailer from whom the equipment  
was purchasedꢀ Should your BEHRINGER dealer not be located in  
your vicinity, you may directly contact one of our subsidiariesꢀ  
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 youꢀ A list of distributors can be  
found in the support area of our website (wwwꢀbehringerꢀcom/)ꢀ  
Registering your purchase and equipment with us helps us  
process your repair claims quicker and more efficientlyꢀ  
Thank you for your cooperation!  
2ꢀ WIRING TIPS  
Figures 2ꢀ1 and 2ꢀ2 show you how to connect your bass to  
the amplifierꢀ  
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  
unitꢀ Then, connect a second cable from the effects output to the  
input on your bass ampꢀ  
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 componentsꢀ  
X V-AMP PRO: no additional tuner requiredꢀ  
+
The built-in loudspeaker is disabled automatically  
when you plug in the headphones!  
Figꢀ 2ꢀ2: Live setup  
5
2ꢀ WIRING TIPS  
 
ULTRABASS BT108  
3ꢀ CONTROL ELEMENTS  
Figꢀ 3ꢀ1: Upper side: Control elements  
Connect your bass to the INSTꢀ INPUT jack, using a  
standard cable with a 1/4" TS connectorꢀ  
Use the VOLUME control to adjust the volume of the  
instrument channelꢀ To change the instrument-to-CD volume  
ratio, use your instrument’s volume controlꢀ  
Use the CD INPUT to connect the output of your CD player,  
tape deck, CD or MD walkmanꢀ This way you can play  
along to music or bass guitar tutorial CDsꢀ  
This connector is a 1/4" TRS jackꢀ If your CD player is  
equipped with cinch outputs, you‘ll need an adapter cable,  
which you can buy at your local music shopꢀ Illustration 4ꢀ3  
in chapter 4ꢀ “AUDIO CONNECTIONS” shows you what  
kind of adapter to buyꢀ You can also use a mono cable (figꢀ  
4ꢀ4)ꢀ This will not damage your CD player or bass ampꢀ  
Figꢀ 3ꢀ2 Rear view: Serial number  
SERIAL NUMBERꢀ  
No matter which way you adjust the controls on your bass  
amp: the sound of your bass also has some influence on the  
overall soundꢀ Therefore we may only give you a few tips to get  
you startedꢀ  
The LOW control allows you to boost or cut the low-  
frequency rangeꢀ  
+
Most bass guitars sound best when their tone and  
volume controls are turned up as much as possible!  
Using the LOW MID control you can boost or cut the lower  
midsꢀ  
The HIGH MID control allows you to boost or cut the upper  
midsꢀ  
Experiment with the controls to find out how you can modify  
the sound to your likingꢀ Experienced bassists write down their  
favorite settings or attach stickies underneath the controlsꢀ  
The HIGH control governs the high-frequency range to  
give your bass a more “cutting” soundꢀ  
The HEADPHONES jack is for headphonesꢀ When you  
plug in your headphones, the built-in loudspeaker is mutedꢀ  
4ꢀ AUDIO CONNECTIONS  
Your BEHRINGER ULTRABASS BT108 features 1/4" connectors  
on inputs and outputsꢀ More detailed information can be found in  
chapter 5, “SPECIFICATIONSꢀ”  
+
+
The headphone signal can also be routed to a mixing  
console or sound reinforcement system! Connect  
the headphones output on your BT108 to the line  
input (LINE IN) on the console (for example,  
BEHRINGER EURORACK UB1222FX-PRO)! Please use a  
mono cable for this application!  
+
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!  
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 BT108ꢀ The  
POWER switch should be set to “Off” before you connect  
your bass amp to the mainsꢀ  
+
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!  
Figꢀ 4ꢀ1: 1/4" mono connector (TS) for the INSTꢀ INPUT  
6
4ꢀ AUDIO CONNECTIONS  
 
ULTRABASS BT108  
5ꢀ 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  
15 Watts  
SYSTEM DATA  
Output stage power  
Figꢀ 4ꢀ2: 1/4" stereo connector (TRS) for headphones or  
CD INPUT  
LOUDSPEAKER  
Type  
8" special custom-made  
loudspeaker  
4  
Impedance  
Power rating  
20 Watts  
POWER SUPPLY  
Mains voltage  
USA/Canada 120 V~, 60 Hz  
UꢀKꢀ/Australia 230 V~, 50 Hz  
China  
Europe  
Japan  
220 V~, 50 Hz  
230 V~, 50 Hz  
100V~, 50-60Hz  
DIMENSIONS/WEIGHT  
Dimensions (H x W x D)  
approxꢀ 13 1/8" x 14 1/16" x 6 3/8"  
(322 mm x 357 mm x 162 mm)  
approxꢀ 5ꢀ6 kg (11 lbsꢀ 3 ozꢀ)  
Weight  
Figꢀ 4ꢀ3: Stereo adapter cable  
Figꢀ 4ꢀ4: Mono adapter cable  
BEHRINGER is constantly striving to maintain the highest professional standardsꢀ As a  
result of these efforts, modifications may be made from time to time to existing products without  
prior noticeꢀ Specifications and appearance may differ from those listed or shownꢀ  
7
5ꢀ SPECIFICATIONS  
 
ULTRABASS BT108  
6ꢀ WARRANTY  
2ꢀ 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 workmanshipꢀ The warranty does not cover any  
such modification/adaptation, irrespective of whether it was  
carried out properly or notꢀ Under the terms of this warranty,  
BEHRINGER shall not be held responsible for any cost resulting  
from such a modification/adaptationꢀ  
§ 1 OTHER WARRANTY RIGHTS AND NATIONAL LAW  
1ꢀ 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  
contractꢀ  
2ꢀ The warranty regulations mentioned herein are applicable  
unless they constitute an infringement of national warranty lawꢀ  
§ 2 ONLINE REGISTRATION  
3ꢀ Free inspections and maintenance/repair work are expressly  
excluded from this warranty, in particular, if caused by improper  
handling of the product by the userꢀ 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 partsꢀ  
Please do remember to register your new BEHRINGER  
equipment right after your purchase by visiting  
wwwꢀbehringerꢀcom (alternatively wwwꢀbehringerꢀde) and  
kindly read the terms and conditions of our warranty carefullyꢀ  
Registering your purchase and equipment with us helps us  
process your repair claims quicker and more efficientlyꢀ Thank  
you for your cooperation!  
4ꢀ Damages/defects caused by the following conditions are  
not covered by this warranty:  
§ 3 WARRANTY  
s improper handling, neglect or failure to operate the unit in  
compliance with the instructions given in BEHRINGER user  
or service manualsꢀ  
1ꢀ 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 belowꢀ 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 partsꢀ 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  
partsꢀ  
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 usedꢀ  
s damages/defects caused by force majeure or any other  
condition that is beyond the control of BEHRINGERꢀ  
5ꢀ Any repair or opening of the unit carried out by unauthorized  
personnel (user included) will void the warrantyꢀ  
6ꢀ 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 customerꢀ  
2ꢀ If the warranty claim proves to be justified, the product will  
be returned to the user freight prepaidꢀ  
7ꢀ Products which do not meet the terms of this warranty will  
be repaired exclusively at the buyer’s expenseꢀ BEHRINGER will  
inform the buyer of any such circumstanceꢀ If the buyer fails to  
submit a written repair order within 6 weeks after notification,  
BEHRINGER will return the unit CꢀOꢀDꢀ with a separate invoice  
for freight and packingꢀ Such costs will also be invoiced  
separately when the buyer has sent in a written repair orderꢀ  
3ꢀ Warranty claims other than those indicated above are  
expressly excludedꢀ  
§ 4 RETURN AUTHORIZATION NUMBER  
1ꢀ To obtain warranty service, the buyer (or his authorized  
dealer) must call BEHRINGER (see enclosed list) during normal  
business hours BEFORE returning the productꢀ All inquiries must  
be accompanied by a description of the problemꢀ BEHRINGER  
will then issue a return authorization numberꢀ  
§ 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 productꢀ No other person  
(retail dealer, etcꢀ) shall be entitled to give any warranty promise  
on behalf of BEHRINGERꢀ  
2ꢀ Subsequently, the product must be returned in its original  
shipping carton, together with the return authorization number to  
the address indicated by BEHRINGERꢀ  
§ 7 CLAIM FOR DAMAGES  
3ꢀ Shipments without freight prepaid will not be acceptedꢀ  
Failure of BEHRINGER to provide proper warranty service shall  
not entitle the buyer to claim (consequential) damagesꢀ In no  
event shall the liability of BEHRINGER exceed the invoiced value  
of the productꢀ  
§ 5 WARRANTY REGULATIONS  
1ꢀ Warranty services will be furnished only if the product is  
accompanied by a copy of the original retail dealer’s invoiceꢀ  
Any product deemed eligible for repair or replacement under the  
terms of this warranty will be repaired or replacedꢀ  
* Customers in the European Union please contact BEHRINGER  
Germany Support for further detailsꢀ  
Technical specifications and appearance subject to change without noticeꢀ The information contained herein is correct at the time of  
printingꢀ The names of companies, institutions or publications pictured or mentioned and their respective logos are registered trademarks  
of their respective ownersꢀ 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 hereinꢀ Colours and specification may vary slightly from productꢀ  
Products are sold through our authorised dealers onlyꢀ Distributors and dealers are not agents of BEHRINGER® and have absolutely no  
authority to bind BEHRINGER® by any express or implied undertaking or representationꢀ 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 GmbHꢀ BEHRINGER® is a registered trademarkꢀ  
ALLRIGHTS RESERVEDꢀ © 2005 BEHRINGER Spezielle Studiotechnik GmbH,  
Hanns-Martin-Schleyer-Strꢀ 36-38, 47877 Willich-Münchheide II, Germanyꢀ  
Telꢀ +49 2154 9206 0, Fax +49 2154 9206 4903  
8
6ꢀ WARRANTY  
 

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