Behringer Minimamp Gma 100 User manual

User Guide
Version 1.1 May 2006
MINIAMP GMA100

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MINIMAMP GMA100
IMPORTANT SAFETY INSTRUCTIONS:
1) Read these instructions.
2) Keep these instructions.
3) Heed all warnings.
4) Follow all instructions.
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, conveni-
ence receptacles, and the point where they exit from the apparatus.
11) Only use attachments/accessories specified by the manufacturer.
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 tip-over.
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 ap-
paratus 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 dropped.

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MINIAMP GMA100
1. INTRODUCTION
The MINIAMP GMA100 is a compact but powerful guitar amplifier. With this unit, you can
adjust not only the volume of your electric guitar, but also the tone and level of distortion. And
you can play privately—the GMA100 includes a headphone connector. For your convenience,
the GMA100 can run on mains power (via a DC 9 V power adapter) or a 9 V battery.
1.1 Before you start
1.1.1 Shipment
Your GMA100 was carefully packed at the factory. 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 GMA100 or its
packaging.
Please ensure proper disposal of all packing materials.
1.1.2 Initial operation
Do not put the GMA100 on any equipment that generates intense heat, for example an
amplifier. Ensure that the ventilation openings are not covered or blocked. Use only a safety-
tested, certified 9 V adapter or a 9 V battery to power the device.
1.INTRODUCTION

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MINIMAMP GMA100
2.CONTROLELEMENTSANDCONNECTIONS
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.Toarrangeforwarrantyservice,pleasecontacttheretailerfromwhomtheequipment
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/support).
Registering your purchase and equipment with us helps us process your repair claims
quicker and more efficiently. Thank you for your cooperation!
2. CONTROL ELEMENTS AND CONNECTIONS
This chapter describes how to use the GMA100 and provides details about registering the
GMA100. The following table describes what each section of this chapter covers:
This section Introduces what you need to...
2.1 Control Elements modify a guitar signal and monitor the status of the GMA100 (on or off)
2.2 Connectors connect the GMA100 to a guitar, headphones, and mains power
2.3 Battery Compartment and Accessories run the GMA100 on a battery and use the setup accessories
2.4 Serial Number register the GMA100
2.1 Control elements
This section illustrates and provides descriptions of the GMA100 control elements that you
need to:

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MINIAMP GMA100
2.CONTROLELEMENTSANDCONNECTIONS
Vmodify a guitar signal
Vmonitor the status of the GMA100 (on or off)
Fig. 2.1: The top of the GMA100
Before you connect a guitar to the GMA100 ( ), turn the VOLUME ( )
control to the minimum setting.
GAIN control:
To adjust the amount of signal distortion, turn this knob toward min (zero, no distortion)
or, alternatively max (maximum distortion).
VOLUME control:
To adjust the volume level of the GMA100, turn this control toward min (no volume) or,
alternatively max (maximum volume).
POWER LED:
As long as you supply power to the GMA100, this LED is illuminated. For details about:
Vmains power, see 2.2 Connectors
Vbattery power, see 2.3 Battery Compartment and Accessories
TONE control: To adjust the signal tone, turn this control toward min (bass) or,
alternatively, max (treble).

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MINIMAMP GMA100
2.CONTROLELEMENTSANDCONNECTIONS
2.2Connectors
This section illustrates and provides descriptions of what you need to connect the GMA100 to:
Van electric guitar
Vheadphones
Vmains power
Fig 2.2: The side of the GMA100
PHONES connector:
To connect headphones to the GMA100 and mute the loudspeaker, use this 1/8" stereo
connector.
High volume levels can overload headphones speakers, which create
distortion. If this happens, reduce the VOLUME setting ( ).
INPUT connector:
To connect an electric guitar to the GMA100, use this 1/4" TS connector (mono).
As long as a guitar is connected to the GMA100, the GMA100 consumes
energy. When you do not use the GMA100 for prolonged periods of time,
unplug your guitar from the INPUT connector.

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MINIAMP GMA100
2.CONTROLELEMENTSANDCONNECTORS
DC 9 V connector:
To supply mains power to the GMA100, plug a DC 9 V power adapter in this connector.
You can also power the GMA100 via a 9 V battery. For details, see 2.3 Battery
Compartment and Accessories.
2.3 Battery compartment and accessories
This section illustrates and provides descriptions of the setup accessories and battery
compartment.
Fig. 2.3: The rear of the GMA100
Belt Clip: To hang the GMA100 from your belt or a wall fixture, use this hook.
Stand: When you set the GMA100 on a table or floor, pull out this stand. This stand
stabilizes the GMA100 and directs the amplified sound upward.
Battery compartment:
To supply battery power to the GMA100, do the following:
1. Remove the cover from the battery compartment.
Inside the battery compartment, you find the 9 V battery connector.
2. Connect a 9 V battery to the 9 V connector.
3. Replace the cover on the battery compartment.

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MINIMAMP GMA100
3.BASIC SETTINGS
2.4 Serial number
The serial number that uniquely identifies your GMA100 is located on the bottom of the unit.
You need this number to register your GMA100. In most countries, register online at
www.behringer.com. In Japan, fill out the warranty card that comes with your unit.
3. BASIC SETTINGS
The sounds that you create with the GMA100 depend on your playing style and guitar. To
find the sounds you want, experiment with the GMA100. To help you get started, the
following table identifies some basic GMA100 settings:

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MINIAMP GMA100
4.SPECIFICATIONS
4. SPECIFICATIONS
INPUT
Type 1/4" TS connector (mono)
Impedance approx. 500 kΩ
PHONES
Type 1/8" stereo connector
Impedance min. 32 Ω
Max. output level 85mW
LOUDSPEAKER
Size 3" (approx. 76 mm)
Impedance 4 Ω
Power rating 5 W
POWER
Power amp output 2 W @ 4 Ωload
Power supply - External power supply: 9 V / min. 250 mA
- Battery: 9 V [type: 61 LR 61 (IEC) or 1604D (ANSI)]
Mains voltages
USA/Canada 120 V~, 60 Hz
China/Korea 220 V~, 50 Hz
U.K./Australia 240 V~, 50 Hz
Europe 230 V~, 50 Hz
Japan 100 V~, 50 - 60 Hz
Power consumption approx. 250 mA
DIMENSIONS/WEIGHT
Dimensions (H x W x D) approx. 6" x 5" x 2 1/2"
(approx. 155 mm x 130 mm x 65 mm)
Weight approx. 1 lb. (approx. 0.5 kg)
BEHRINGERisconstantlystrivingto manintainthehighest professionalstandards.Asaresultoftheseefforts, modificationsmaybe
madefrom timeto timeto existingproducts withoutprior notice.Specifications andappearancemaydifferfromthoselistedorillustrated.

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MINIMAMP GMA100
5. WARRANTY
5. WARRANTY
§1 OTHER WARRANTYRIGHTSAND 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!
§3WARRANTY
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