TWEETERTWEETER
USER MANUALUSER MANUAL
ENGINEERED IN GERMANY
2
Congratulations!
General instructions
Dear Customer,
Congratulations on your purchase of this high-quality product.
HELIX COMPOSE highlights best quality, excellent manufacturing and state-of-the-art sound quality.
Thanks to more than 30 years of experience in research and development of audio products HELIX COMPOSE sets
new standards in the car audio speaker market.
We wish you many hours of enjoyment with your new HELIX COMPOSE components.
Yours
AUDIOTEC FISCHER Team
General instructions for installing HELIX
loudspeakers
To prevent damage to the speakers and possible injury,
read this manual carefully and follow all installation
instructions. This product has been checked for proper
function prior to shipping and is guaranteed against
manufacturing defects.
For a proper performance and to ensure full warranty
coverage, we strongly recommend to get this product
installed by an authorized HELIX dealer.
If you choose to perform your own installation read the
following information and precautions carefully.
Failure to follow the stated precautions may result in
personal injury and / or damage to the audio system or
vehicle.
1. Always make sure that the speaker will t into
the intended mounting location and that there is
adequate depth for the magnet system.
2. Check for adequate space between speaker and
window, window crank, power window mechanism,
seat, rear deck torsion bars, and other items which
may interfere with the speaker`s mounting. This
is very important if any hole cutting is required.
Detailed size information is indicated in the dimension
section of this manual. Take care that the mounting
surface is at and free from all obstructions.
3. Ensure that the loudspeakers are correctly
connected in polarity. Exchanging plus and minus
may result in signicant loss of sound quality. The
positive leads of the loudspeakers are marked red.
4. Make sure that all speaker wiring is fully protected
from cutting or wear at sharp edges, which can lead
to short circuits that may damage your head unit,
amplier and / or speaker system.
5. Verify that all connection wires are long enough in
order to avoid any mechanical stress on the wires or
the connectors.
6. Make sure that all components are mounted properly.
7. Do not mount the components where water may
splash on them.
8. The quality of the installation has a signicant eect
on the overall performance of the speaker system.
Treat each installation step with a high degree of
attention.
9. Avoid low frequency cancellation caused by air
leakage between the speaker basket and the
mounting surface (e.g. mounted on a bended or
uneven surface or mounted in an oversized hole).
10. Mounting panel reinforcement may be necessary
in some cases in order to ensure a stable, torsion-
free and even surface. This can be achieved by
mounting the speaker on a metal, plastic or wooden
sub-bae behind the body or door panel. Consult an
installation specialist for further advices.
11. In most cases you can use the original speaker
mounting locations in the doors, A-pillars, body
panels or the rear deck. If these are not available you
have to prepare your own secure installation place.
Due to their structural integrity and accessibility the
precut mounting holes should be used whenever
possible. Information on a proper mounting can be
found in the section “Installation” of this manual.
IMPORTANT: Never cut any metal that is an integral part
of an automobile`s safety or structural car body.
We strongly recommend that you operate the complete
audio system at low volume before nal installation. So
you can check whether each speaker is working before
securing the loudspeakers into their mounting locations.
3
Find your composition
Go to www.audiotec-fischer.com/compose to explore the whole
HELIX COMPOSE platform including an up-to-date overview of
available car-specific adaptors
Option a:
Flush mount
Option b:
Angle mount
Option c:
Professional integration with optionally available car- specic adaptor
Step 1
Step 3
Step 2
Step 1
Step 3
Step 2
The optionally available car-specic tweeter adaptor rings allow a tailored and acoustically
optimized adaption of the HELIX COMPOSE tweeters to the vehicles original mounting location. .
Mounting
The warranty service is based on the statutory regulations. Defects and damage caused by overload or improp-
er handling are excluded from the warranty service. Any return can only take place following prior consultation, in the original packag-
ing together with a detailed description of the error and a valid proof of purchase. Technical modications, misprints and errors excepted!
For damages on the vehicle and the device, caused by handling errors of the device, we can’t assume liability. All HELIX speakers are tagged with a CE-Certication
mark. Thereby these devices are certied for the use in vehicles within the European Community (EC).
Warranty disclaimer
Correct disposal of this product
(Applicable in the European Union and other countries with separate collection systems)
If you want to dispose this product, do not mix it with general household waste. There is a separate collection system for used electronic products in accordance with
legislation that requires proper treatment, recovery and recycling. Contact your local government oce for details in locating a recycle facility close to you. Proper
recycling and waste disposal will help conserve resources and prevent detrimental eects on our health and the environment.
Made in China
AUDIOTEC FISCHER GmbH
Hünegräben 26 - 28
57392 Schmallenberg
Germany
Technical data
Ci5 T25FM-CA
Impedance Z 4 Ω
DC resistance Re 3.2 Ω
Frequency response
2.000 Hz - 25.000 Hz
Resonance frequency
Fs
1800 Hz
Sensitivity SPL 94 dB @ 2.83V / 1m
91 dB @ 1W / 1m
Voice coil diameter Ø
25 mm
Cone material Aluminum with ceramic coating
Recommended crossover frequencies for the highpass
Slope Minimum crossover frequency
6 dB/Octave > 4.000 Hz
12 dB/Octave > 3.000 Hz
24 dB/Octave > 2.500 Hz
With housing for angle mount With housing for ush mountWithout housing
ø47.5mm
ø1.87”
ø40.0mm
ø1.57”
8.6mm
0.34”
42.3mm
1.67”
10.3mm
0.41”
ø47.5mm
ø1.87”
8.6mm
0.34”
40°
41mm
1.61”
5.0mm
0.19”
11.7mm
0.46”
38.0mm
1.50”
