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Operating instructions
Loudspeaker Chassis 6-75 W 8 Ohm CPA6-75WM
Item no. 300877
Intended use
The loudspeaker chassis is used to convert the electric output signals from audio amplifiers into
audible sound waves and is only intended for connection to the loudspeaker outputs of such
devices or suitable diplexers.
The product may only be used in enclosed indoor locations. Outdoor use is not allowed. Do not
expose to moisture, for example in bathrooms or similar spaces.
For safety and approval reasons, you may not convert and/or alter the product. If you use the
product for purposes other than those described above, the product may be damaged. Further-
more, improper use can cause risks such as short-circuits, fire, etc. Please read the operating
instructions carefully and do not discard them. If you pass the product on to a third party, please
hand over these operating instructions as well.
This product complies with the applicable national and European regulations. All names of
companies and products are the trademarks of the respective owners. All rights reserved.
Package contents
• Loudspeaker chassis
• Operating instructions
Up-to-date operating instructions
Download the latest operating instructions via the link www.conrad.com/downloads or scan the
QR code. Follow the instructions on the website.
Explanation of symbols
An exclamation mark in a triangle indicates important instructions in these operating
instructions which absolutely have to be observed.
The arrow symbol is used to indicate where specific tips and information on handling
should be given.
Safety instructions
Please read the operating instructions carefully and pay particular attention to
the safety instructions. We do not assume liability for injuries/material damag-
es resulting from failure to observe the safety instructions and the information
in these operating instructions regarding the proper handling of the product.
Furthermore, in such cases, the warranty/guarantee will be null and void.
• The product is not a toy. Keep out of the reach of children and pets.
• Do not carelessly leave packaging material lying about. It may become a dange-
rous plaything for children.
• Observe the safety instructions of the device to which you intend to connect the
loudspeaker chassis.
• Do not listen to excessively loud music over long periods of time. This may da-
mage your hearing.
• Never expose the product to mechanical stress.
• Please handle the product with care. It can be damaged by impact, blows, or by
being dropped, even from a low height.
• Do not store any magnetic storage media such as, e.g., floppy disks, video tapes,
etc., in the proximity of the loudspeaker chassis as the magnetic field of the louds-
peaker might destroy the information stored on the storage media.
• If you have doubts about how the product should be operated or how to safely
connect it, consult a qualified technician.
• Maintenance, adjustment and repair work should only be carried out by an expert
or a specialised workshop.
• If you have any questions that are not answered in these operating instructions,
please contact our technical customer service or other professionals.
Installation in a speaker enclosure
• The loudspeaker chassis must be installed in a speaker enclosure for operation.
• The size and construction of a suitable speaker enclosure is calculated based on the „Techni-
cal data". A loudspeaker construction programme is very useful for this purpose.
An exact description of the calculation procedure is beyond the scope of these ope-
rating instructions due to its complexity.
• Saw out a suitable loudspeaker section and install the loudspeaker airtight in the enclosure.
The basket edge of the loudspeaker chassis has already a sealing foam strip at-
tached for airtight installation.
Connection
To achieve full performance and sound quality, the loudspeaker chassis must be connected to
the audio amplifier using a suitable diplexer.
The diplexer splits the audio frequencies into different bands and delivers the fre-
quencies to the suitable loudspeaker chassis.
Connect the loudspeaker chassis to the diplexer as follows:
• Large connector >> positive connection to the diplexer
• Small connector >> negative connection to the diplexer
Care and cleaning
Never use abrasive cleaning agents, cleaning alcohol or other chemical solutions
since these could damage the product or even impair operation.
Use a dry, lint-free cloth or a brush to clean the product very carefully.
Disposal
Electronic devices are recyclable material and do not belong in the household was-
te. Dispose of an unserviceable product in accordance with the relevant statutory
regulations.
Technical data
Impedance (Z) ..................................................... 8 Ohm
Maximum load ..................................................... 75/225 W (RMS/max.)
Frequency range ................................................. 40-5000 Hz
Acoustic pressure ................................................ 91 dB (1 W/1 m)
DC resistance (Rdc) ............................................ 7.1 Ohm
Open-air resonance frequency (Fo) .................... 54.6218 Hz
Effective cone area (Sd) ...................................... 0.0125 m²
B x l factor ............................................................ 13.6854 Tm
Mechanical quality (Qms) .................................... 2.6268
Electrical quality (Qes) ......................................... 0.2535
Total quality (Qts) ................................................. 0.2312
Equivalent volume (Vas) ...................................... 9.6214 l
Membrane mass (Mms) ....................................... 19.4815 g
Moving mass (Mmd) ............................................ 18.6809 g
Mechanical compliance of suspension (Cms) ..... 435.7986 µm/N
Voice coil inductivity (L) ....................................... 1.0966 (@ 1 kHz) /0.4562 mH (@ 20 kHz)
Efficiency ............................................................. 0.5982 %
Basket diameter ................................................... 16.5 cm (6.5 inches)
Installation diameter ............................................ 145 mm
Installation depth ................................................. 72.5 mm
Weight ................................................................. 2.42 kg
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 2017 by Conrad Electronic SE.
300877_V2_0717_02_VTP_m_en
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