Harley Benton GA 15 User manual

GA 15
guitar combo
user manual

Musikhaus Thomann e.K.
Treppendorf 30
96138 Burgebrach
Germany
Telephone: [phone]
E-mail: [email protected]
Internet: www.thomann.de
08.11.2012

Table of contents
1 General notes............................................................................................................................................... 4
2 Safety instructions..................................................................................................................................... 7
3 Features....................................................................................................................................................... 12
4 Installation and starting up................................................................................................................ 13
4.1 Pin assignment.................................................................................................................................. 14
5 Connections and operating elements........................................................................................... 15
6 Technical specifications....................................................................................................................... 21
7 Protecting the environment.............................................................................................................. 22
Table of contents
GA 15
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1 General notes
This user manual contains important information on safe operation of the device. Read and
follow all safety notes and all instructions. Save this manual for future reference. Make sure
that it is available to all persons using this device. If you sell the device, include the manual for
the next owner.
Our products are subject to a process of continuous development. We therefore reserve the
right to make changes without notice.
This section provides an overview of the symbols and signal words used in this user manual.Symbols and signal words
General notes
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Signal word Meaning
DANGER! This combination of symbol and signal word
indicates an immediate dangerous situation
that will result in death or serious injury if it is
not avoided.
CAUTION! This combination of symbol and signal word
indicates a possible dangerous situation that
can result in minor injury if it is not avoided.
NOTICE! This combination of symbol and signal word
indicates a possible dangerous situation that
can result in material and environmental
damage if it is not avoided.
Warning signs Type of danger
Warning – high-voltage.
General notes
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Warning signs Type of danger
Warning – danger zone.
General notes
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2 Safety instructions
This device is intended to be used for amplification and playback of signals from musical
instruments with electromagnetic pickups. Any other use or use under other operating condi‐
tions is considered to be improper and may result in personal injury or property damage. No
liability will be assumed for damages resulting from improper use.
This device may be used only by persons with sufficient physical, sensorial, and intellectual
abilities and having corresponding knowledge and experience. Other persons may use this
device only if they are supervised or instructed by a person who is responsible for their safety.
DANGER!
Danger for children
Ensure that plastic bags, packaging, etc. are disposed of properly and are not
within reach of babies and young children. Choking hazard!
Ensure that children do not detach any small parts (e.g. knobs or the like) from
the unit. They could swallow the pieces and choke!
Never let children unattended use electrical devices.
Intended use
Safety
Safety instructions
GA 15
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DANGER!
Electric shock caused by high voltages inside
Within the device there are areas where high voltages may be present. Never
remove any covers.
There are no user-serviceable parts inside.
DANGER!
Electric shock caused by short-circuit
Always use proper ready-made insulated mains cabling (power cord) with a pro‐
tective contact plug. Do not modify the mains cable or the plug. Failure to do so
could result in electric shock/death or fire. If in doubt, seek advice from a regis‐
tered electrician.
Safety instructions
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CAUTION!
Possible hearing damage
With loudspeakers or headphones connected, the device can produce volume
levels that may cause temporary or permanent hearing impairment.
Do not operate the device permanently at a high volume level. Decrease the
volume level immediately if you experience ringing in your ears or hearing
impairment.
NOTICE!
Risk of fire
Do not cover the device nor any ventilation slots. Do not place the device near
any direct heat source. Keep the device away from naked flames.
Safety instructions
GA 15
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NOTICE!
Operating conditions
This device has been designed for indoor use only. To prevent damage, never
expose the device to any liquid or moisture. Avoid direct sunlight, heavy dirt, and
strong vibrations.
NOTICE!
Possible damages to tube power amps by loadless operation or improper
impedance
Operating this device without connecting speakers or using an improper load
impedance can damage the tube power amp. The device has no built-in load
resistance.
Connect a speaker or separate load resistance with a suitable impedance to the
amp's output before switching the amplifier on.
Safety instructions
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NOTICE!
Power supply
Before connecting the device, ensure that the input voltage (AC outlet) matches
the voltage rating of the device and that the AC outlet is protected by a residual
current circuit breaker. Failure to do so could result in damage to the device and
possibly injure the user.
Unplug the device before electrical storms occur and when it is unused for long
periods of time to reduce the risk of electric shock or fire.
Safety instructions
GA 15
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3 Features
Special features of this device:
nClass AB all tube amp
n15 watt RMS output power
n10" speaker
n3-band EQ
nThree speaker outs
nHeadphones and line outs
nSerial effects loop
Features
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4 Installation and starting up
Unpack and check carefully there is no transportation damage before using the unit. Keep the
equipment packaging. To fully protect the device against vibration, dust and moisture during
transportation or storage use the original packaging or your own packaging material suitable
for transport or storage, respectively.
Establish all connections as long as the unit is switched off. Use the shortest possible high-
quality cables for all connections.
NOTICE!
Possible property damage by magnetic fields
Loudspeakers produce a static magnetic field. Therefore, maintain an appropriate
distance to devices that can be adversely affected or damaged by an external
magnetic field.
Installation and starting up
GA 15
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4.1 Pin assignment
Drawing and table indicate the pin assignment of 1/4" TS phone plugs to be used for the input,
the line out, the effects loop and the speaker outlets.
1 Signal
2 Ground, shielding
Drawing and table indicate the pin assignment of a 1/4" TRS phone plug to be used for the
headphones output (PHONES).
1 Signal left channel
2 Signal right channel
3 Ground, shielding
Phone sockets for signal in and
outputs
Installation and starting up
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5 Connections and operating elements
Front panel
Connections and operating elements
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1INPUT
1/4" TS phone socket for the input signal from your instrument.
2BASS
Bass control of the 3-band EQ.
3MIDDLE
Mid control of the 3-band EQ.
4TREBLE
Treble control of the 3-band EQ.
5VOLUME
Volume control.
6PHONES
1/4" TRS phone socket for headphones connection. Connecting headphones will mute the built-in speaker.
To avoid disturbing noises, turn the volume control (5) all down before you plug the headphones in or out.
Connections and operating elements
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7STANDBY
Turns the plate voltage for the tubes on or off. When pausing playing or warming up the amp, the STANDBY switch
should be in OFF position while the POWER switch is in ON position. This extends the life span of the tubes.
8POWER
Mains switch to turn the unit on or off.
Connections and operating elements
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Rear panel
Connections and operating elements
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9AC
IEC chassis connector with fuse holder.
10 SEND
Effect loop output. Connect the input of an external effects device to this output.
11 RETURN
Effect loop input. Connect the output of an external effects device to this input.
This is a serial effects loop, i.e., the effect signal is not mixed with the dry signal, but replaces it. This makes it particu‐
larly suitable to connect sound processors such as a compressor, that has to process the entire signal. If you connect a
reverb unit or the like here, the effect proportion may be too high. In this case, adjust the ratio of dry to wet signal in
the effects unit accordingly.
Connections and operating elements
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12 LINE OUT
Signal line out.
13 SPEAKER 4|8|16 OHM
1/4" phone sockets for speaker outs. Connect either the built-in speaker hear (to the 8 ohm socket) or an external
speaker box with an impedance of 4 Ω, 8 Ω or 16 Ω to the respective socket.
If the device is operated without connected speaker load or with an improper load impedance, the power stage of
the amp may be damaged.
Connections and operating elements
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