Technical Data; Maintenance And Cleaning - Speaka Professional 1375412 Mode D'emploi

b) Connecting the amplifier to audio devices
Turn the volume control knob (3) anticlockwise until you feel a click before inserting
or disconnecting a pair of headphones. This prevents the risk of hearing damage
due to excessive volume levels.
• Connect the 3.5 mm 4-pole to 3.5 mm 4-pole cable to an available 3.5 mm jack output on an
audio signal source and the audio input (6) on the headphones amplifier.
• Connect the 3.5 mm jack plug on your headphones to either of the 3.5 mm jack sockets
(1 or 2) on the headphones amplifier. You can connect up to two pairs of headphones to the
two audio outputs (1 and 2).
c) Listening to/amplifying the audio signal
• Put the headphones/earphones on.
• Turn on the audio signal source, e.g. a smartphone.
• Turn on the headphones amplifier by turning the volume control knob clockwise. You will hear
a soft click. The multifunctional LED turns blue.
• Carefully select the desired volume.
Please note that a headset remote control cannot be used if two of them are
connected at the same time.
Only one microphone should be used when two headsets with a remote control
are connected.
• Set the bass amplification (bass level) using the selector switch (5). Three settings are
available. The selector switch settings are marked above the switch.
- Bass 0 (left): Normal
- Bass 1 (middle): Bass amplification I
- Bass 2 (right): Bass amplification II

Maintenance and cleaning

Never use aggressive and abrasive detergents, rubbing alcohol or other
chemical solutions, as these could damage the casing or even impair the
functioning of the product.
• Disconnect the product from the power supply before cleaning.
• Use a soft, antistatic and lint-free cloth to clean the device.
• Dust can be easily removed using a clean and soft brush.
Disposal
Electronic devices are recyclable waste and must not be disposed of in the household
waste. At the end of its service life, dispose of the product according to the relevant
statutory regulations.
You thus fulfil your statutory obligations and contribute to the protection of the environment.

Technical data

a) Headphones amplifier
Operating voltage/current .....................5 V/DC, 200 mA
Output power ........................................max. 90 mW (at 32 Ω, 1.7 V, 0.2% THD+N)
Inputs ....................................................1 x stereo jack socket (3.5 mm)
Outputs .................................................2 x stereo jack sockets (3.5 mm)
Frequency range ..................................20 - 20,000 Hz (±1.0 dB)
Headphone impedance ........................32 Ω volume 80%, bass boost 1
Supported headphone impedances ......16 - 100 Ω
Distortion factor ....................................0.03% at 1 mW; 0.05% at 32 mW
S/N Ratio ..............................................>90 dBA
Operating/storage conditions ................0 to +70 °C, 10 - 85 % RH (non-condensing)
Dimensions (W x H x D) .......................45.5 x 15.5 x 47 mm
Weight ..................................................approx. 30 g
b) Internal rechargeable battery
Battery type ..........................................Lithium polymer
Battery capacity ....................................200 mAh
Battery life (when fully charged) ...........>8 hours
Charging time (for full charging cycle) ..60 minutes
This is a publication by Conrad Electronic SE, Klaus-Conrad-Str. 1, D-92240 Hirschau (www.conrad.com).
All rights including translation reserved. Reproduction by any method, e.g. photocopy, microfilming, or the capture in electronic data
processing systems require the prior written approval by the editor. Reprinting, also in part, is prohibited. This publication represent the
technical status at the time of printing.
© Copyright 2015 by Conrad Electronic SE.
max. 33 mW (at 100 Ω, 1.8 V, 0.1% THD+N)
Micro USB port (charging port)
1375412_v1_1015-DS