FOCAL SERIE KX User Manual

K2 Power subwoofer manual

Congratulations on purchasing a
product from the range, K2 Power.
We are happy you share our
passion, for "the Spirit of Sound".
K2 Power subwoofers contain the
very latest enhanced technologies,
for high power handling, and
unrivalled sound quality. To
obtain the best results from this
product, we recommend that you
follow carefully all the information
contained in this manual. If
not followed correctly any fault
observed, may not be covered by
the guarantee.

Warning

Due to the high power handling
characteristics employed, subwoofers
from the K2 Power range are capable
of producing extreme volume levels.
Continued listening at high volume
levels above 110dB, are regarded not
ideal for listening pleasure. Listening
above 130dB can permanently
damage your hearing. Focal does
not accept responsibility, for unlawful
playing, in the event of a criminal
prosecution. Please exercise restraint.

The Focal guarantee only ap­plies if the enclosed guarantee
card is returned to us within 10
days of purchase.

Features

Membrane/cone K2 Power

Reference CKM sandwich composite,
comprising of Kevlar®/foam/Kevlar®
material structure. Extremely rigid
structure, improved power handling,
low distortion characteristics.

Multi-ferrite motor unit

Focals renowned multi-ferrite motor
continues with increased x3 level stack
(33 KX, 40 KX, 46 KX 4). Higher BL
sum magnet power. Open access for
natural cooling of the voice coil.

Designed for sealed or closed box
volumes

Optimised for comparatively small
volumes, being sealed. Producing a
full deep bass experience, even at
high volume levels (27 KX, 33 KX and
40 KX).

Power hi-fi

Designed for bass reflex enclosures.
High efficiency SPLs for fast dynamic
bass (46 KX 4).

Spider braid sandwich

All output braids whether single
double or quadruple connections
impregnated into spider, sandwiched
to form one complete layer. Zero
problem from lead-out wire fatigue.
Zero problem from lead-out wire
tapping against cone assembly.

Chassis moulded from metal alloy

Non magnetic, and inherently rigid
structure.

Focal-JMlab® - BP 374 - 108, rue de l'Avenir - 42353 La Talaudière cedex - France - www.focal-fr.com

Due to constant technological advances, Focal reserves its right to modify specifications without notice. Images may not conform exactly to specific product.

Tel. [phone] - Fax [phone]

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A

27 KX 33 KX / 40 KX

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B C

Simple connection: 4 ohms Connecting in parallel: 1 ohms

33 KX / 40 KX 33 KX / 40 KX

D E

Connecting in series: 4 ohms Double connection: 2x2 ohms

Installation

Running-in period Connecting-up (general) Connections (33 KX and 40 KX)

K2 Power subwoofers incorporate the
very latest components. To ensure
such complex mechanical elements
work in harmony with the rest of
your system, they must be allowed to
function correctly in this environment.
Such changes in temperature and
humidity are regarded as very hostile.
For K2 Power subwoofers to benefit,
a running-in period must be used to
ensure they are prepared for this. We
recommend that once the system is
ready for listening the subwoofers
should be run-in at medium volume
setting. The use of audio material
that contains good low frequencies
is ideal to gain their full potential.
We recommend this running period
be used for at least one week. After
which the excellent performance of
your K2 Power subwoofers can be
fully appreciated.

Fitting

Each subwoofer kit comes complete
with its fixing kit. This consists of self­tapping wood screws, metal inserts
and threaded bolts, plus a reel of
foam gasket material.
Depending on whether the subwoofer
is to be installed standard recessed
flush-fit or inverted, requires careful
examination before any cutting is
attempted for example a rear panel
installation (fig. A). The desired baffle
location or custom made enclosure
must be rigid and strong enough to
hold the weight of the driver. We
recommend the sealing gasket is
attached to the driver, then the driver
placed into position and attached
securely in place.

It is imperative the correct connection
is always maintained to the subwoofer.
The correct phase is important,
especially when integrating it into
a broad-bandwidth or component
speaker system; such in the case of
a 2 or 3 way set up. Not doing so
will drastically reduce the overall
performance.
Connection to the subwoofer use
the standardised system of, RED =
positive +, and BLACK = negative -.
This must be followed and inverted
if the driver is installed in the reverse
(inverted install).
For those subwoofers with twin (33 KX
and 40 KX) or quadruple connection
(46 KX 4), careful understanding of
the various parallel and series circuits
must be determined first, by verifying
compatibility with the amplifier load
characteristics, and overall system
integration.

Connections (27 KX)

The 27 KX subwoofer uses a single
4 ohms voice coil, thus consists of a
single input terminal (fig. B). Verify the
output stage and if your amplifier has
a bridging function, to gain further
benefit, use it. Ensure it is compatible
with a 4 ohms impedance load.

Both 33 KX and 40 KX subwoofers,
use a dual voice coil, thus each
consist of two input connectors. To
achieve high power integration to
your system, we recommend the
two connectors, are connected in a
parallel circuit formation (fig. C). In
this situation, an impedance load of
approximately 1 ohms will be present.
For connection to the amplifier, it is
important to ensure such low load
is compatible. It is also possible to
connect the voice coil into a series
type circuit, producing an impedance
load of approximately 4 ohms (fig. D).
This is generally recommended if your
amplifier is not compatible to low load
impedances of less that 1 ohms. The
33 KX and 40 KX can also benefit from
"Bi-amping" configurations (fig. E). It
is important to ensure both amplifiers
are of the same specification and
power rating. Also a traditional 2
channel stereo amplifier (high power
recommended) can also be used,
allowing further installation flexibility.

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