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Related Manuals for Harley Benton GPA-400
Summary of Contents for Harley Benton GPA-400
- Page 1 GPA-400 Stereo Guitar Power Amp...
- Page 2 Thomann GmbH Hans-Thomann-Straße 1 96138 Burgebrach Germany Telephone: +49 (0) 9546 9223-0 Internet: www.thomann.de 01.12.2022, ID: 319961 (V3)
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Page 3: Table Of Contents
Installation and starting up........................ 13 4.1 Tips on handling speakers......................14 4.2 Additional useful tips........................15 Connections and operating elements................... 17 Technical specifications........................20 Plug and connection assignment....................22 Cleaning............................... 24 Protecting the environment......................25 GPA-400 Stereo Guitar Power Amp... - Page 4 GPA-400 Stereo Guitar Power Amp...
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Page 5: General Information
Our products and user manuals are subject to a process of continuous development. We there‐ fore reserve the right to make changes without notice. Please refer to the latest version of the user manual which is ready for download under www.thomann.de. GPA-400 Stereo Guitar Power Amp... -
Page 6: Further Information
Personal consultation For personal consultation please contact our technical hotline. If you have any problems with the device the customer service will Service gladly assist you. 1.2 Notational conventions This manual uses the following notational conventions: GPA-400 Stereo Guitar Power Amp... -
Page 7: Symbols And Signal Words
NOTICE! This combination of symbol and signal word indicates a pos‐ sible dangerous situation that can result in material and environmental damage if it is not avoided. GPA-400 Stereo Guitar Power Amp... - Page 8 General information Warning signs Type of danger Warning – high-voltage. Warning – danger zone. GPA-400 Stereo Guitar Power Amp...
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Page 9: Safety Instructions
Within the device there are areas where high voltages may be present. Never remove any covers. There are no user-serviceable parts inside. Do not use the device if covers, protectors or optical components are missing or damaged. GPA-400 Stereo Guitar Power Amp... - Page 10 (for example after transport at low outside temperatures). Dust and dirt inside can damage the unit. When operated in harmful ambient conditions (dust, smoke, nicotine, fog, etc.), the unit should be maintained by qualified service personnel at regular intervals to prevent overheating and other malfunction. GPA-400 Stereo Guitar Power Amp...
- Page 11 NOTICE! Possible damage due to installation of a wrong fuse The use of different types of fuses can cause serious damage to the unit. Fire hazard! Only fuses of the same type may be used. GPA-400 Stereo Guitar Power Amp...
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Page 12: Features
Features Features Maximum output power 400 W @ 8 Ω Operating modes: Bridged Mono, Stereo Volume, Resonance and Presence adjustable per channel Fanless operation GPA-400 Stereo Guitar Power Amp... -
Page 13: Installation And Starting Up
Rack mounting The unit has been designed for rack mounting in a standard 19-inch rack; it occupies one rack unit. GPA-400 Stereo Guitar Power Amp... -
Page 14: Tips On Handling Speakers
If you notice distortion during operation, either the amp or the speaker is overloaded. This may permanently damage the amp or the speaker. Always reduce the volume when you hear dis‐ tortion. GPA-400 Stereo Guitar Power Amp... -
Page 15: Additional Useful Tips
If you want to connect multiple speakers to one amplifier output, note the following: when connecting speakers in series, the impedances add up. GPA-400 Stereo Guitar Power Amp... - Page 16 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.tho‐ mann.de). GPA-400 Stereo Guitar Power Amp...
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Page 17: Connections And Operating Elements
Connections and operating elements Connections and operating elements Front panel BRIDGE VOLUME RESONANCE PRESENCE VOLUME RESONANCE PRESENCE SIGNAL PEAK MUTE PEAK SIGNAL POWER GPA-400 GUITAR POWER AMPLIFIER ö & ä GPA-400 Stereo Guitar Power Amp... - Page 18 10 [SIGNAL] | indicator LED (green). This LED lights up when the device is turned on and a signal is present in channel B. 11 [VOLUME] | volume control for channel B 12 [RESONANCE] | resonance control for channel B 13 [PRESENCE] | presence control for channel B GPA-400 Stereo Guitar Power Amp...
- Page 19 16 [OUTPUTS CHA] | output sockets to connect a passive speaker box in bridged mono mode (channel A) 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 GPA-400 Stereo Guitar Power Amp...
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Page 20: Technical Specifications
8 Ω, bridged 400 W Frequency response 20 Hz … 20 kHz Signal-to-noise ratio > 90 dB Total harmonic distortion (THD) < 0.15 % Cooling fanless Damping factor > 80 Sensitivity 335 mV Gain 39.5 dB GPA-400 Stereo Guitar Power Amp... - Page 21 5 mm × 20 mm, 2,5 A, 250 V, slow-blow Dimensions (W × H × D) 482 mm × 44 mm × 250 mm Weight 3 kg Ambient conditions Temperature range 0 °C…40 °C Relative humidity 20 %…80 % (non-condensing) GPA-400 Stereo Guitar Power Amp...
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Page 22: Plug And Connection Assignment
180°. 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. GPA-400 Stereo Guitar Power Amp... - Page 23 Plug and connection assignment 1/4" TS phone plug (mono, unbalanced) Signal Ground, shielding 1/4" TRS phone plug (stereo, unbalanced) Signal (left) Signal (right) Ground GPA-400 Stereo Guitar Power Amp...
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Page 24: Cleaning
The fan grids of the device must be cleaned of any contamination, such as dust, etc. on a reg‐ ular basis. Before cleaning, switch off the device and disconnect mains-operated devices from the mains. Only use pH-neutral, solvent-free and non-abrasive cleaning agents. Clean the unit with a slightly damp lint-free cloth. GPA-400 Stereo Guitar Power Amp... -
Page 25: Protecting The Environment
Dispose of this device through an approved waste disposal firm or through your local waste facility. When discarding the device, comply with the rules and regulations that apply in your country. If in doubt, consult your local waste disposal facility. GPA-400 Stereo Guitar Power Amp... - Page 26 Notes GPA-400 Stereo Guitar Power Amp...
- Page 28 Musikhaus Thomann · Hans-Thomann-Straße 1 · 96138 Burgebrach · Germany · www.thomann.de...