33 KX

330 mm K2 Power® subwoofer

Multiferrites magnet

Zamak basket

For closed box

High power handling

Dual voice coil

Suggested Application

Sealed enclosure

40 liters (1.41 cu. ft.)

 

 

 

F - 3

= 41Hz / Punchy and dynamic bass

 

 

30 liters (1.06 cu. ft.)

50 liters (1.77 cu. ft.)

 

 

F - 3 = 42Hz / Fast and tight bass

F - 3

= 40Hz / Deep and articulate bass

SPL (dB) 1W/1m

Frequency (Hz)

Mechanical Drawing

Specifications

 

Nominal power

400 W

 

 

 

 

 

 

 

 

Maximum power

800 W

 

 

 

 

 

 

 

 

Sensitivity

90 dB

 

 

 

 

 

 

 

Cone

K2 Composite Sandwich®

 

Surround

Butyl

 

 

 

 

 

 

 

 

Nom. impedance

4 ohms (2 x 2)

 

 

 

 

 

 

 

 

DC resistance

4.2 ohms (2 x 2.1)

 

 

 

 

 

 

 

 

VC diameter

65 mm

2.55 in

 

 

 

 

 

 

VC height

32 mm

1.26 in

 

 

 

 

 

 

Former

aluminium

 

 

 

 

 

 

 

 

Layers

4

 

 

 

 

 

 

 

 

Wire

Copper

 

 

 

 

 

 

 

 

Inductance

4.3 mH (in series)

 

 

 

 

 

 

 

 

Xmax

11 mm

0.43 in

 

 

 

 

 

 

Magnet d x h (18)

60 x 14 mm

2.36 x 0.55 in

 

 

 

 

 

 

Magnet weight

2916 g

6.42 Ib

 

 

 

 

 

 

Flux density

0.9 T

 

 

 

 

 

 

 

 

Gap height

10 mm

0.39 in

 

 

 

 

 

 

Net weight

9.8 kg

21.6 Ib

 

 

 

 

 

Parameters

Fs

39 Hz

 

Vas

24.59 I

0.86 Ft3

Qts

0.733

 

 

 

 

Qes

0.84

 

 

 

 

Qms

5.77

 

 

 

 

Re

4.2 ohms (in series)

 

 

 

 

Sd

490.87 cm2

7.6 in2

Cas

1.75E-07 m5/N

 

Mas

95.12 kg/m4

 

Ras

4039.65 ohms.ac

 

 

 

 

Cms

7.27E-05 m/N

 

 

 

 

Mms

229.2 g

0.5 Ib

 

 

 

Rms

9734 g/s

 

 

 

 

Ces

816.18 mF

 

 

 

 

Les

20.4 mH

 

 

 

 

Res

28.85 ohms

 

©Focal-JMlab - SC030519/1

ø

320

 

8xø 5,50

11

ø 335

8

19

180

62

ø 198

ø 289

Unit : mm

BI

16.76 N/A (in series)

SPL

84.24 dB/W/m

Suggested application

Load

V (l)

Fb (Hz)

F-3 (Hz)

Ql

 

 

 

 

 

Sealed

30

-

42

7

 

 

 

 

 

Sealed

40

-

41

7

 

 

 

 

 

Sealed

50

-

40

7

 

 

 

 

 

Focal® is a trademark of Focal-JMlab®

BP 374 - 108, rue de l'Avenir - 42353 La Talaudière cedex - France - Tel. +33 4 77 43 57 00 - Fax +33 4 77 43 57 04 - w w w . f o c a l - f r . c o m

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Focal 33 KX specifications Suggested Application, Mechanical Drawing Specifications, Parameters

33 KX specifications

The Focal 33 KX is a high-performance subwoofer that represents the pinnacle of audio engineering in home theater and personal audio systems. Designed for audiophiles and music enthusiasts, the 33 KX boasts outstanding sound quality and deep bass reproduction, making it a centerpiece for any audio setup.

One of the key features of the Focal 33 KX is its advanced driver technology. The subwoofer comes equipped with a robust 13-inch speaker cone made from a blend of polypropylene and fiberglass, which ensures rigidity and minimizes distortion. The cone’s design contributes to the subwoofer’s ability to produce powerful low-frequency sounds while maintaining clarity and precision.

Another significant characteristic of the 33 KX is its innovative Bass-Reflex design. This technology utilizes strategically positioned ports to enhance airflow and optimize bass output. The result is a deeper, more impactful bass response that can fill larger rooms without overwhelming the listener. The rear-firing port design allows for flexible placement options, ensuring that the subwoofer integrates seamlessly into any space.

In terms of power, the Focal 33 KX is equipped with a high-performance built-in amplifier, delivering an impressive output of 800 watts RMS. This power not only drives the subwoofer to its full potential but also provides headroom for transient peaks, ensuring that sudden bursts of sound are rendered accurately without distortion.

The subwoofer features adjustable settings, including a variable crossover and phase control, allowing users to tailor the sound to their specific environment and preferences. This level of customization ensures compatibility with a wide range of audio systems, including 2.1 setups, home theaters, and larger multi-channel configurations.

Lastly, the Focal 33 KX is designed with an aesthetic appeal, featuring a sleek and modern cabinet design that blends easily into various decor styles. Its durable construction and high-quality finishes guarantee longevity, making it a worthy investment for both casual listeners and serious audiophiles.

In summary, the Focal 33 KX combines cutting-edge technology with robust design to deliver exceptional low-frequency performance, making it a must-have subwoofer for anyone seeking an immersive audio experience.