Table of contents Table of contents General notes............................... 4 Safety instructions............................. 7 Features............................... 12 Installation and starting up........................ 13 4.1 Pin assignment..........................14 Connections and operating elements................... 15 Technical specifications........................21 Protecting the environment......................22 GA 15...
General notes 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.
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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. GA 15...
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General notes Warning signs Type of danger Warning – danger zone. guitar combo...
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. GA 15...
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Safety instructions 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.
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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. GA 15...
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Safety instructions 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.
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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. GA 15...
Features Features Special features of this device: Class AB all tube amp 15 watt RMS output power 10" speaker 3-band EQ Three speaker outs Headphones and line outs Serial effects loop guitar combo...
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. GA 15...
Installation and starting up 4.1 Pin assignment Phone sockets for signal in and Drawing and table indicate the pin assignment of 1/4" TS phone plugs to be used for the input, outputs the line out, the effects loop and the speaker outlets. Signal Ground, shielding Drawing and table indicate the pin assignment of a 1/4"...
Connections and operating elements Connections and operating elements Front panel GA 15...
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Connections and operating elements 1 INPUT 1/4" TS phone socket for the input signal from your instrument. 2 BASS Bass control of the 3-band EQ. 3 MIDDLE Mid control of the 3-band EQ. 4 TREBLE Treble control of the 3-band EQ. 5 VOLUME Volume control.
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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. 8 POWER Mains switch to turn the unit on or off. GA 15...
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Connections and operating elements Rear panel guitar combo...
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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. GA 15...
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Connections and operating elements 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.
Preamp: 2 × 12AX7 Power stage: 2 × EL84 Operating voltage AC 220 – 240 V , 50/60 Hz Power consumption 80 W Dimensions (W × D × H) 425 mm × 390 mm × 255 mm Weight 15.7 kg GA 15...
Protecting the environment Protecting the environment Disposal of the packaging mate‐ rial For the transport and protective packaging, environmentally friendly materials have been chosen that can be supplied to normal recycling. Ensure that plastic bags, packaging, etc. are properly disposed of. Do not just dispose of these materials with your normal household waste, but make sure that they are collected for recycling.
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