thomann Millenium HP4 User Manual

HP4

headphone amplier

user manual

Musikhaus Thomann

Thomann GmbH

Hans-Thomann-Straße 1

96138 Burgebrach

Germany

Telephone: [phone]

E-mail: [e-mail]

Internet: www.thomann.de

04.09.2018, ID: 234787 (V3)

Table of contents

1 General information................................................................................................................................. 4

1.1 Further information........................................................................................................................... 5

1.2 Notational conventions.................................................................................................................... 6

1.3 Symbols and signal words............................................................................................................... 6

2 Safety instructions..................................................................................................................................... 8

3 Features....................................................................................................................................................... 13

4 Installation and starting up................................................................................................................ 14

5 Connections and controls................................................................................................................... 15

6 Functions..................................................................................................................................................... 19

7 Technical specications....................................................................................................................... 20

8 Plug and connection assignment.................................................................................................... 22

9 Protecting the environment.............................................................................................................. 24

Table of contents

HP4

3

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

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1.1 Further information

On our website (www.thomann.de) you will nd lots of further information and details on the
following points:

Download This manual is also available as PDF le for you to download.

Keyword search

Use the search function in the electronic version to nd the topics of
interest for you quickly.

Online guides

Our online guides provide detailed information on technical basics
and terms.

Personal consultation For personal consultation please contact our technical hotline.

Service

If you have any problems with the device the customer service will
gladly assist you.

General information

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1.2 Notational conventions

This manual uses the following notational conventions:

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 nd an overview of the meaning of symbols and signal words that are
used in this manual.

Letterings

General information

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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 pos‐

sible dangerous situation that can result in minor injury if it
is not avoided.

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.

Warning signs Type of danger

Warning – high-voltage.

Warning – danger zone.

General information

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2 Safety instructions

This device is intended to be used for amplication 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.

This device may be used only by persons with sucient 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.

Intended use

Safety instructions

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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. 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.

Safety

Safety instructions

HP4

9

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 re. 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.

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.

Safety instructions

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NOTICE!
Risk of re

Do not block areas of ventilation. Do not install the device near any direct heat
source. Keep the device away from naked ames.

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

HP4

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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 re.

NOTICE!
Possible staining

The plasticiser contained in the rubber feet of this product may possibly react
with the coating of your parquet, linoleum, laminate or PVC oor and after some
time cause permanent dark stains.

In case of doubt, do not put the rubber feet directly on the oor, but use felt-pad
oor protectors or a carpet.

Safety instructions

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3 Features

n excellent sound quality
n exible switching matrix
n 4 independent stereo inputs with unsymmetrical jack sockets
n four signal outputs, each with line and headphone jack and individual volume control
n low noise linear operational amplier 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)

Features

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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 o. Use the shortest possible high-quality cables for
all connections. Take care when running the cables to prevent tripping hazards.

The unit has been designed for rack mounting in a standard 19-inch rack; it occupies one rack
unit.

Rack mounting

Installation and starting up

headphone amplier

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5 Connections and controls

Front panel

Connections and controls

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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

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Rear panel

Connections and controls

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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/o.

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.

10 [RIGHT]

Audio inputs (1/4" jack socket, unbalanced)

For using stereo mode, connect the right channel of the signal source to the input of the respective channel.

Connections and controls

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6 Functions

The device amplies 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 exible 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. Turn the dedicated
volume knobs to adjust the channel volume within a range of 0 to 10.

Functions

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7 Technical specications

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 0.02 %

Signal-to-noise ratio > 80 dB

Technical specications

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Crosstalk suppression > 68 dB with 1 kHz, 20 dB input

Operating supply voltage

115/230 V 50/60 Hz

Power consumption 11.5 W

Fuse 5 mm× 20 mm, 0,5 A, 230 V, fast blow

5 mm× 20 mm, 1 A , 115 V, fast blow

Dimensions (W × H × D) 482.6 mm × 44.5 mm × 217 mm

Weight 3.15 kg

Technical specications

HP4

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8 Plug and connection assignment

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 ts into the socket, an incorrect connection may result in a destroyed power amp, a short
circuit or ‘just’ in poor transmission quality!

Unbalanced transmission is mainly used in semi-professional environment and in hi use.
Instrument cables with two conductors (one core plus shielding) are typical representatives of
the unbalanced transmission. One conductor is ground and shielding while the signal is trans‐
mitted through the core.

Unbalanced transmission is susceptible to electromagnetic interference, especially at low
levels, such as microphone signals and when using long cables.

In a professional environment, therefore, the balanced transmission is preferred, because this
enables an undisturbed transmission of signals over long distances. In addition to the conduc‐
tors ‘Ground’ and ‘Signal’, in a balanced transmission a second core is added. This also transfers
the signal, but phase-shifted by 180°.

Introduction

Balanced and unbalanced trans‐
mission

Plug and connection assignment

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Since the interference aects 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 Signal

2 Ground, shielding

1 Signal (left)

2 Signal (right)

3 Ground

1/4" TS phone plug (mono,
unbalanced)

1/4" TRS phone plug (stereo,
unbalanced)

Plug and connection assignment

HP4

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9 Protecting the environment

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.

This product is subject to the European Waste Electrical and Electronic Equipment Directive
(WEEE) in its currently valid version. Do not dispose with your normal household waste.

Dispose of this device through an approved waste disposal rm 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.

Disposal of the packaging mate‐
rial

Disposal of your old device

Protecting the environment

headphone amplier

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Notes

HP4

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Notes

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Musikhaus Thomann · Hans-Thomann-Straße 1 · 96138 Burgebrach · Germany · www.thomann.de