musikelectronic geithain ME25 User manual

musikelectronic geithain
ME 25
Instructions for installation and use

TABLE OF CONTENTS II
musikelectronic geithain GmbH ME 25
Table of contents
1 Introduction 1
2 Disclaimer 2
3 System description 3
4 Basic information 4
4.1 Guidelines 4
4.2 Safety instructions 4
4.3 Unboxing 5
4.4 Delivery contents 5
4.5 Cleaning 5
4.6 Environmental conditions 5
4.7 Guarantee acknowledgements 5
5 Positioning 6
5.1 Positioning near walls 6
5.2 Stereo operation 7
5.3 Surround operation 8
6 Connecting the speakers 9
7 Specications 10
8 Acoustic measurements 11
9 Notes 12

INTRODUCTION 1
musikelectronic geithain GmbH ME 25
1 Introduction
Dear customer,
Thank you for the trust you have put in us by buying these speakers. You decided upon a quality
product that in regard to tonal and technical characteristics complies to the utmost expectations.
The usual burn-in period is not required, because the speakers are articially aged in-house.
Please read the technical description and manual to take advantage of the capabilities
of these speakers and ensure safe operation.

DISCLAIMER 2
musikelectronic geithain GmbH ME 25
2 Disclaimer
Technical data and appearances are subject to changes without notice. Errors and omissions
excepted. Musikelectronic Geithain GmbH assumes no liability for any loss which may be suffered
by any person who relies either wholly or in part upon any description, photograph or statement
contained herein. Musikelectronic Geithain GmbH products are sold through authorized fulllers
and resellers only. Fulllers and resellers are not agents of Musikelectronic Geithain GmbH and
have absolutely no authority to bind Musikelectronic Geithain GmbH by any express or implied
undertaking or representation. This manual is copyrighted. No part of this manual may be reproduced
or transmitted in any form or by any means, electronic or mechanical, including photocopying and
recording, or by any information storage or retrieval system without the prior written permission of
Musikelectronic Geithain GmbH.
All rights reserved
Copyright © 2018 Musikelectronic Geithain GmbH

SYSTEM DESCRIPTION 3
musikelectronic geithain GmbH ME 25
3 System description
The ME 25 2-way coaxial loudspeaker is the most compact passive loudspeaker in our ME series.
Its 5-inch woofer system and its 1-inch tweeter system are integrated into a vented cabinet and
feature excellent converter linearity. The ME 25 performs very well as front and effect loudspeaker
in 5.1 surround systems; in connection with a suitable AV receiver, it can be complemented with our
BASIS 11K subwoofer. Its mid-treble range qualities are highly independent of room characteristics,
which contributes to uncomplicated spatial positioning of the loudspeaker. The particular radiation
characteristics allow a well-balanced listening experience for a base width between 1 m (3′3″) and
3 m (9′10″). The ME 25 can be operated horizontally. Optionally, a stand in matching veneer with
integrated cable duct is available.
The general concept of the passive 2-way coaxial loudspeaker ME25 is characterized by its minimal
dimensions, its well-balanced and low-distortion sound pattern and its high dynamic qualities.
“In spite of the minimal dimensions, these transducers sounded so true, natural and still musical - it
really left a mark on us. When listening to these transducers, their perfect play makes you suddenly
feel like a real audio engineer. Suddenly you hear details which you believe to never have heard
before.” DVD & Surround Test 06/2003

BASIC INFORMATION 4
musikelectronic geithain GmbH ME 25
4 Basic information
4.1 Guidelines
This product complies to requirements of current European and national guidelines (2004/108/EG
Electromagnetical Compatiblity). The conformity is ascertained, corresponding declarations and
records are deposited with the manufacturer.
Products built by us belong to B2C-class of the WEEE guidelines and must not
be disposed with domestic waste.
4.2 Safety instructions
Like using any other electrical device you should observe the following operation guidelines, safety
instructions and warning signs to ensure optimum functionality and safety of operation!
;Read these instructions carefully.
;Keep these instructions during the life cycle at a safe place. The instructions are an important
part of the product.
;Heed all warnings. Follow all instructions.
;The product may only be used in accordance with the information provided in the user manual.
Before and during the usage of the amplier please ensure that all recommendations, especially
the safety recommendations in the user manual, are adhered to.
;Do not place this product on an unstable cart, stand, tripod, bracket, or table. The product may
fall, causing serious injury, and damage to the product.
;Do not expose the device to direct sun radiation.
;Do not install the device in rooms with high humidity.
;Do not try to insert anything into device openings.
;The device shall not be exposed to dripping or splashing and no objects lled with liquids shall
be placed on the device.
;Clean only with dry or slightly moistened cloth.
;Refer all servicing to qualied service personnel.

BASIC INFORMATION 5
musikelectronic geithain GmbH ME 25
4.3 Unboxing
The speakers are shipped in proper condition. Unpack the speaker carefully and check for visible
damages. In case of damages report them to your retailer. Keep the packaging, in case the speaker
has to be transported in the future.
4.4 Delivery contents
;Speaker ME 25
;Technical description and user manual
4.5 Cleaning
The speaker is made of real wood veneer and needs to be nurtured in the same way as furnishings.
We advise quality wax polish to ensure durability of the veneer. Surfaces can also be cleaned with
tidy, slightly damped, fuzz-free, smooth cloth.
4.6 Environmental conditions
Ensure the following environmental conditions in your listening room:
;Operating temperature +15 °C ... +35 °C (+59 °F ... +95 °F)
;Storage temperature range −25 °C ... +45 °C (−13 °F ... +113 °F)
;Relative humidity 45 % ... 75 %
4.7 Guarantee acknowledgements
Opening the device by unauthorized personnel leads to all claims under guarantee expire. In case of
destruction by overload, misuse or outside inuences there are no claims under guarantee.

POSITIONING 6
musikelectronic geithain GmbH ME 25
5 Positioning
Our speakers do not impose special requirements neither in stereo nor in multichannel set-ups.
Nonetheless speaker positioning has inuence on listening impression because every room is
individually designed and furnished. The following advices are just guidelines that ease proper
positioning. In addition we offer a measurement service to take advantage of the capabilities of your
listening environment.
5.1 Positioning near walls
When speakers are installed near walls sound quality is physically affected. Every customary speaker
behaves as a punctual sonic source in the low frequency range, with sonic waves spherical radiated
without any constructional measures. Back wall reections are unavoidable.
For optimum listening experience a minimum distance of 50 cm (19.7″) to walls and furniture should
be ensured. Avoid corner installations because unwanted bass accentuation could arise.
b
b
;Minimum distance to wall b ≥ 50 cm (19.7″)

POSITIONING 7
musikelectronic geithain GmbH ME 25
5.2 Stereo operation
The optimum position of the speakers in your listening environment is the so-called stereo triangle
(see gure). The base distance between the speakers and the distance to the hearing zone form an
equilateral triangle (stereo triangle). A distance less than 1 m (3′3″) or more than 3 m (9′10″) should
be avoided. For precise,spacial reproduction turn the speakers inside,directed to the hearing zone.
a
a a
hearing zone
60°
;Distance between speakers and your listening position a = 1 m … 3 m (3′3″ … 9′10″)
;Adjust the speaker horizontally to the height of the ear at the listening position

POSITIONING 8
musikelectronic geithain GmbH ME 25
5.3 Surround operation
In surround operation the stereo triangle (see Stereo operation) is extended to a circle. The hearing
zone is the centre of this circle. Position all speakers in the same distance to the hearing zone. The
centre speaker is positioned in the middle between both front speakers. Pay attention to positioning
the front and rear speakers horizontally along one plane. The angle between centre and rear speakers
should be about 110° – 120°.
;Distance between speakers and your listening position a = 1 m … 3 m (3′3″ … 9′10″)
In case installation in the prescribed way is not possible in your listening room most decoding
devices allow adjustments of single speakers.
60°
110° ... 120°
a
a
a
aa
hearing zone

CONNECTING THE SPEAKERS 9
musikelectronic geithain GmbH ME 25
6 Connecting the speakers
Our passive speakers are no difcult load to common ampliers. An amplier power of 50 W … 80 W
at 4 Ω is suggested. Due to the linearized impedance the operation with tube ampliers is possible
without difculties. Your authorized ME Geithain dealer will gladly provide you with professional
advice.
When connecting the speakers to an integrated amplier or a power stage check the connection for
the right polarity. The gold-plated screwed joints of the terminal are labelled with + and a -. Both
mustn’t be interchanged.

SPECIFICATIONS 10
musikelectronic geithain GmbH ME 25
7 Specications
General Passive high-end compact loudspeaker for listening distances between
1 m (3′3″) and 3 m (9′10″)
Principle of construction Coaxial 2-way system in vented cabinet
Maximum SPL 108 dB peak / r = 1 m (3′3″) (4 π)
Bandwidth 50 Hz ... 20 kHz ±3 dB
Sensitivity 85 dB / r = 1 m (3′3″)
Directivity index
from 200Hz ... 10 kHz increasing from 1.5dB to 11dB
Total harmonic distortion
measured at 90dBSPL / r = 1 m (3′3″)
from 100Hz ... 10 kHz ≤ −40 dB
Impedance 4 Ω
Electronic crossover frequency 2.5 kHz
Nominal power handling 50 W
Maximum power handling 80 W
Recommended amplier output power 50 W ... 80 W
Input connector gold-plated binding posts
Drive units
Woofer
Tweeter
1× 130 mm (5″) cone
1× 25 mm (1″) dome
Environmental conditions
for use
for storage
humidity
+15 °C ... +35 °C (+ 59 °F ... +95 °F)
−25 °C ... +45 °C (−13 °F ... +113 °F)
45 % ... 75 %
Dimensions (H × W × D)
ME 25
ME 25 with stand
320 mm × 205 mm × 220 mm (12.6″ × 8.1″ × 8.7″)
1,076 mm × 265 mm × 280 mm (42.4″ × 10.5″ × 11.1″)
Weight
ME 25
ME 25 with stand
5.5 kg (12.2 lbs)
11 kg (24.3 lbs)
Design of the cabinet
Body MDF wood in ash black veneered; different veneers and colours on
request
Lateral mounting none; lateral mounting on request
Stand on request

ACOUSTIC MEASUREMENTS 11
musikelectronic geithain GmbH ME 25
8 Acoustic measurements
All acoustic measurements are carried out under anechoic conditions with 1 m (3′3″) distance.
20 50 100 200 500 1k 2k 5k 10k 20k
90
85
80
75
70
65
[dB]
[Hz]
FREE FIELD FREQUENCY RESPONSE
2
1
0
[%]
K2 K3
[Hz]
80 100 200 500 1k 2k 5k 10k
TOTAL HARMONIC DISTORTIONS PA= 90 dB
0° 30°h

NOTES 12
musikelectronic geithain GmbH ME 25
9 Notes

NOTES 13
musikelectronic geithain GmbH ME 25

musikelectronic geithain gmbh
STUDIO MONITORING - HIGHEND LOUDSPEAKER - SOUND REINFORCEMENT
SYSTEMS SYSTEMS
Nikolaistraße 7
04643 Geithain / Germany
Phone: [phone]
Fax: [phone]
Email: [email protected]
www.me-geithain.de
BDA_ME 25_17.05.2018_ENV17