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THE
FOCAL
GUARANTEE
ONLY
APPLIES
IF
PAGE
19
IS
RETURNED
TO
US
WITHIN
10
DAYS
OF
PURCHASE
.
Due to constant technological advances, Focal reserves its right to modify specifications without notice. Images may not conform exactly to specific product.
Focal® is a trademark of Focal-JMlab® - BP 374 - 108, rue de l'Avenir - 42353 La Talaudière
cedex - France - Tel. (+33) 04 77 43 57 00 - Fax (+33) 04 77 43 57 04 - www.focal-fr.com
This product has been designed using the very latest technologies available; to
ensure the quality performance is to a very high standard. To gain the best results
from your subwoofer, please ensure you follow these recommendations. If not
followed correctly any fault observed, may not be covered by the guarantee.
Cables
For optimum performance the use of OFC cable (Oxygen Free Cable), to a sufficient thickness
(2.5mm²) is highly recommended. This is particularly important in the case of long cable
lengths being used in the installation. We recommend the use of Focal cables FC500 or
FC700. Check with your local Focal dealer for further advice.
Connecting up
Always check the polarity to the subwoofer, and that of the other speakers used in your
installation. The polarity is important to ensure the phase characteristics remain correct,
otherwise a "loss" of performance can result. The spring action input terminals are clearly
marked red spot = positive (+) and black spot = negative (-).
The 21 V2 uses a single coil; thus, there is one set of input terminals. For the 27 V2, 33 V2 and
40 V2, these all use a double coil system, thus have 2 x 2 input terminals incorporated.
These subwoofers can be mounted in the traditional sense with the membrane on view
externally, or inverted mounting with the motor unit and its chrome back plate on display.
Inverted mounting helps increasing the volume for the given space available. When choosing
inverted mounting the phase must be inverted (thus swap the positive / to negative connections)
so that the polarity is correctly observed.
Multi-subwoofer installations
To obtain a more powerful acoustic presence, we recommend the introduction of multiple
subwoofers for your chosen installation. Using multiple subwoofers, various series or parallel
or combinations of both can be used, but always check the specifications of the power source
(amplifier) before attempting any installation. It is worth remembering if low impedance of
2 or even 1 ohm is chosen an amplifier of high quality should always be used for such
installation.
POLYGLASS SUBWOOFERS MANUAL
U s e r
M a n u a l
notice sub polyglass 2.indd 1
notice sub polyglass 2.indd 1
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