HP4 headphone amplifier user manual
Musikhaus Thomann Thomann GmbH Hans-Thomann-Straße 1 96138 Burgebrach Germany Telephone: +49 (0) 9546 9223-0 E-mail: info@thomann.de Internet: www.thomann.de 04.09.
Table of contents Table of contents 1 General information................................................................................................................................. 1.1 Further information........................................................................................................................... 1.2 Notational conventions.................................................................................................................... 1.3 Symbols and signal words.....
General information 1 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. Our products are subject to a process of continuous development. Thus, they are subject to change.
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. Keyword search Use the search function in the electronic version to find the topics of interest for you quickly. Online guides Our online guides provide detailed information on technical basics and terms.
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.
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.
Safety instructions 2 Safety instructions Intended use This device is intended to be used for amplification and distribution of signals from audio devices and musical instruments to the connected headphones and audio devices. 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.
Safety instructions 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. DANGER! Electric shock caused by high voltages inside Within the device there are areas where high voltages may be present.
Safety instructions 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. CAUTION! Possible hearing damage With loudspeakers or headphones connected, the device can produce volume levels that may cause temporary or permanent hearing impairment.
Safety instructions NOTICE! Risk of fire Do not block areas of ventilation. Do not install the device near any direct heat source. Keep the device away from naked flames. 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.
Safety instructions 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.
Features 3 Features excellent sound quality flexible switching matrix 4 independent stereo inputs with unsymmetrical jack sockets four signal outputs, each with line and headphone jack and individual volume control low noise linear operational amplifier for transparent sound with maximum headroom at high output levels n integrated shielded double-regulated power supply n Installation in 19" racks (1 rack unit) n n n n n HP4 13
Installation and starting up 4 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. Create all connections while the device is off. Use the shortest possible high-quality cables for all connections.
Connections and controls 5 Connections and controls Front panel HP4 15
Connections and controls 1 [VOLUME] Volume control for the built-in speakers and headphone outputs. 2 [PHONE] Headphones outputs (1/4" phone socket, stereo). 3 [LINE] Line outputs (1/4" TRS phone jack, stereo) for looping through the input signals to the connected audio equipment. 4 [INPUT SOURCE] Rotary switch for the allocation of four rear-panel audio inputs on the front line and headphone outputs. 5 [POWER] LED to indicate the operating status. This LED shows that the unit is turned on.
Connections and controls Rear panel HP4 17
Connections and controls 6 IEC chassis plug for power supply with fuse holder. 7 Selector switch for the supply voltage of the device (115 V or 230 V, factory-set value). 8 [ON | OFF] Mains switch to turn the device on/off. 9 [LEFT (MONO)] Audio inputs (1/4" jack socket, unbalanced) For using mono mode, connect the signal source to the input of the respective channel. For using stereo mode, connect the left channel of the signal source to the input of the respective channel.
Functions 6 Functions The device amplifies and distributes up to four input signals in mono or stereo mode to the four integrated output channels. The output signals can be played via up to four headphones and / or looped through to four more audio devices with line level. Moreover, thanks to the flexible switch matrix, you can use the rotary switch INPUT SOURCE to link or mute the inputs and outputs of the four channels to your liking.
Technical specifications 7 Technical specifications Audio inputs 4 × (6.35-mm jack, unbalanced) Impedance 47 kΩ Peak-input level +25 dB Gain-control range +35 dB Headphone outputs. 4 × 6.35mm phone jack (stereo) Max. output level: 300 mW (RMS), 1 W (Peak) Output impedance 22 Ω Max. gain +20 dB Line outputs 4 × (6.35-mm jack, unbalanced/parallel) Frequency range 20 Hz … 20 kHz (0 dB … –2 dB) Distortion 0.
Technical specifications Crosstalk suppression > 68 dB with 1 kHz, 20 dB input Operating supply voltage 115/230 V Power consumption 11.5 W Fuse 5 mm× 20 mm, 0,5 A, 230 V, fast blow 50/60 Hz 5 mm× 20 mm, 1 A , 115 V, fast blow Dimensions (W × H × D) 482.6 mm × 44.5 mm × 217 mm Weight 3.
Plug and connection assignment 8 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.
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.
Protecting the environment 9 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. Please follow the notes and markings on the packaging.
Notes HP4 25
Notes headphone amplifier 26
Musikhaus Thomann · Hans-Thomann-Straße 1 · 96138 Burgebrach · Germany · www.thomann.
