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Table of Contents
Related Manuals for Harley Benton Harley Benton GPA-400
Summary of Contents for Harley Benton Harley Benton GPA-400
- Page 1 GPA-400 stereo guitar power amp user manual...
- Page 2 Musikhaus Thomann e.K. Treppendorf 30 96138 Burgebrach Germany Telephone: +49 (0) 9546 9223-0 E-mail: info@thomann.de Internet: www.thomann.de 14.07.2014, ID: 319961...
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Page 3: Table Of Contents
Table of contents Table of contents General information..........................4 1.1 Further information........................... 5 1.2 Notational conventions........................6 1.3 Symbols and signal words....................... 6 Safety instructions............................. 8 Features............................... 13 Connections and operating elements................... 14 Installation and starting up........................ 19 5.1 Tips on handling speakers......................21 5.2 Additional useful tips........................ -
Page 4: General Information
General information General information This manual contains important instructions for the safe operation of the unit. Read and follow the safety instructions and all other instructions. Keep the manual for future reference. Make sure that it is available to all those using the device. If you sell the unit please make sure that the buyer also receives this manual. -
Page 5: Further Information
General information 1.1 Further information On our website (www.thomann.de) you will find lots of further information and details on the following points: Download This manual is also available as PDF file for you to download. Use the search function in the electronic version to find the topics of Keyword search interest for you quickly. -
Page 6: Notational Conventions
General information 1.2 Notational conventions This manual uses the following notational conventions: Letterings The letterings for connectors and controls are marked by square brackets and italics. Examples: [VOLUME] control, [Mono] button. 1.3 Symbols and signal words In this section you will find an overview of the meaning of symbols and signal words that are used in this manual. - Page 7 General information 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 pos‐ sible dangerous situation that can result in minor injury if it is not avoided.
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Page 8: Safety Instructions
Safety instructions Safety instructions Intended use This device amplifies electric audio frequency signals to operate passive speakers. Use the device only as described in this user manual. Any other use or use under other operating con‐ ditions 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. - Page 9 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.
- Page 10 Safety instructions 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.
- Page 11 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! 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.
- Page 12 Safety instructions NOTICE! Magnetic fields The device generates strong magnetic fields that can interfere with the function of poorly shielded devices. The strongest magnetic fields are directly above and below the power amplifier. Therefore, never place sensitive devices such as pre- amplifiers, radio transmission systems, or tape decks directly above or below the power amplifier.
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Page 13: Features
Features Features Maximum output power 400 W @ 8 Ω Operating modes: Mono, stereo, bridged Volume, Resonance and Presence adjustable per channel Fanless operation GPA-400... -
Page 14: Connections And Operating Elements
Connections and operating elements Connections and operating elements Front panel stereo guitar power amp... - Page 15 Connections and operating elements 1 [POWER ON | OFF] Main switch to turn the device on and off. 2 [VOLUME] Volume control for channel A. 3 [RESONANCE] Resonance control for channel A. 4 [PRESENCE] Presence control for channel A 5 [SIGNAL] Indicator LED (green).
- Page 16 Connections and operating elements 8 [MUTE] Switch to mute the device. The white indicator LED lights up when the unit is muted. 9 [PEAK] Indicator LED (red). This LED lights up when Channel B is overloaded by an excessive input signal. 10 [SIGNAL] Indicator LED (green).
- Page 17 Connections and operating elements Rear panel 14 [INPUTS] Input sockets for channels A and B. 15 [Mono|Bridge|Stereo] Switch to toggle between mono / bridged operation via channel A and stereo operation via channels A and B. 16 [OUTPUTS CHA] Output sockets for connecting a passive speaker box in mono or bridged mode (channel A). GPA-400...
- Page 18 Connections and operating elements 17 [OUTPUTS CHB] Output sockets to connect a second passive speaker box in stereo mode (channels A and B). 18 IEC chassis plug with fuse holder. stereo guitar power amp...
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Page 19: Installation And Starting Up
Installation and starting up Installation and starting up Unpack and carefully check that 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. - Page 20 Installation and starting up NOTICE! Magnetic fields The device generates strong magnetic fields that can interfere with the function of poorly shielded devices. The strongest magnetic fields are directly above and below the power amplifier. Therefore, never place sensitive devices such as pre- amplifiers, radio transmission systems, or tape decks directly above or below the power amplifier.
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Page 21: Tips On Handling Speakers
Installation and starting up 5.1 Tips on handling speakers We recommend you to set up the speakers in a way, that the sound signals can reach the audi‐ ence unobstructedly. It will often be helpful to mount the speakers on tripods. Thus, the sound will be evenly spread with maximum range throughout the audience area. -
Page 22: Additional Useful Tips
Installation and starting up 5.2 Additional useful tips Available operating modes Depending on the respective application, the guitar amp can be used in various modes: Stereo Both power amp channels operate independently of each other, each input (CHA and CHB) is amplified by one channel, speakers are connected to both channels, the volume for both outputs can be controlled sepa‐... - Page 23 This means, for example with two speakers with the same impedance: In series connection, impedance is doubled. In parallel connection, it's halved. Detailed information on this topic can be found in our online guide ‘Speakers’ (www.thomann.de). GPA-400...
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Page 24: Technical Specifications
Technical specifications Technical specifications Output power 2 × 50 W @ 16 Ω 2 × 100 W @ 8 Ω 2 × 200 W @ 4 Ω 100 W, bridged @ 16 Ω 200 W, bridged @ 8 Ω Frequency range 20 Hz…20 kHz Input sensitivity 335 mV... - Page 25 Technical specifications Cooling fanless Power consumption 18 W Operating supply voltage AC 230 V , 50 Hz Dimensions (W × D × H) 482 mm × 250 mm × 44 mm Weight 3 kg GPA-400...
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Page 26: Plug And Connection Assignment
Plug and connection assignment Plug and connection assignment Introduction This chapter will help you select the right cables and plugs to connect your valuable equip‐ ment in such a way that a perfect sound experience is ensured. Please note these advices, because especially in ‘Sound & Light’ caution is indicated: Even if a plug fits into the socket, an incorrect connection may result in a destroyed power amp, a short circuit or ‘just’... - Page 27 Plug and connection assignment Since the interference affects both cores equally, by subtracting the phase-shifted signals, the interfering signal is completely neutralized. The result is a pure signal without any noise inter‐ ference. 1/4" TS phone plug (mono, unbalanced) Signal Ground, shielding 1/4"...
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Page 28: Cleaning
Cleaning Cleaning Fan grids The fan grids of the device must be cleaned on a regular basis to remove dust and dirt. Before cleaning, switch off the device and disconnect AC-powered devices from the mains. Use a lint- free damp cloth for cleaning. Never use solvents or alcohol for cleaning. stereo guitar power amp... -
Page 29: Protecting The Environment
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. - Page 30 Notes stereo guitar power amp...
- Page 32 Musikhaus Thomann e.K. · Treppendorf 30 · 96138 Burgebrach · Germany · www.thomann.de...