Focal E 30KX
K2 Power Series 12" dual 4-ohm voice coil component subwoofer
Our take on the Focal E 30KX by Crutchfield's Bob Bihlmayer
This sub's name gets straight to the point — Focal's K2 Power E 30 KX 12" subwoofer delivers hard-hitting low end that combines realistic reproduction with competition-level sound pressure. Precision engineering and hand-assembled construction make this sub a sound choice for a high-performance bass system.
The super-rigid zinc alloy basket creates a stable platform for powerful, accurate bass.
Assembled and inspected by hand
You can feed the K2 Power E 30 KX 12" subwoofer up to 800 watts RMS without fear. This dual 4-ohm voice coil sub works best in sealed enclosures to produce bass that's highly accurate and plenty forceful. Focal assembles each sub by hand and rigorously inspects them for any flaws to ensure your investment performs to the high sonic standards they've set.
A massive two-segment magnet supplies the backbone for the sub's powerful reputation, driving the motor assembly with unerring precision. Focal anchors the K2 Power sub with a rugged zamak zinc alloy basket for dependable performance that won't get bent out of shape by your music.
At the top end of the sub, a butyl rubber surround maintains control of the cone, even during deep excursion. Focal's unique composite sandwich cone employs a structural foam central core coated with a layer of Aramid fiber on the front and a glass layer on the back side. The three layers together form an incredibly rigid yet lightweight membrane for high-quality sound reproduction with an added emphasis on thunderous sound pressure.
To drive this single subwoofer, we recommend a mono amplifier rated between 600 and 1200 watts RMS at 2 ohms. For more information, please refer to our article on How to Match Subwoofers and Amplifiers.
- 12" dual 4-ohm voice coil subwoofer
- aramid fiber/foam/glass composite sandwich cone with butyl rubber surround
- zamak zinc alloy basket
- power range: 100-800 watts RMS
- peak power handling: 1600 watts
- frequency response: 25-500 Hz
- sensitivity: 84.5 dB
- top mount depth: 6-13/16"
- sealed box volume: 0.35 - 0.52 cu. ft.
- ported box volume: 0.88 - 1.05 cu.ft.
- grille not included
- warranty: 1 year
- Our 60-day money-back guarantee
What's in the Box:
- One 12" Dual 4-ohm voice coil subwoofer
- Owner's manual (English/ French/ German/ Italian/ Spanish/ Portuguese/ Dutch/ Russian)
Why Shop With Us?12 Reasons.
Features and Specs
|Impedance||2 ohms or 8 ohms|
|Cone Material||K2 Kevlar Sandwich|
|Surround Material||Butyl Rubber|
|Ideal Sealed Box Volume (cubic feet)||1.24|
|Ideal Ported Box Volume (cubic feet)||N/A|
|Port diameter (inches)||N/A|
|Port length (inches)||N/A|
|Dual Voice Coil||Yes|
87 dB at 2.83 volts |
84.5 dB at 1 watt
|Frequency Response||20 - 500 Hz|
|Max RMS Power Handling||800|
|Peak Power Handling (Watts)||1600|
|Top Mount Depth (inches)||6 13/16|
|Bottom Mount Depth (inches)||N/A|
|Cutout Diameter or Length (inches)||11 3/16|
|Parts Warranty||1 Year|
|Labor Warranty||1 Year|
K2 Cone: The woofer cone is a sandwich composite consisting of a foam core, a structural glass fiber bottom layer, and a Kevlar top layer. This combination of materials results in a rigid, light weight cone with excellent damping characteristics.
Dual 4Ω Voice Coils: The dual 4Ω voice coils offer wiring flexibility; when wired in parallel the woofer presents a 2Ω load, when wired in series the woofer presents an 8Ω load.
Compression Terminals: The two sets of spring post terminals will accommodate single banana plugs, dual banana plugs (standard 3/4" width), and bare speaker wire up to 10 gauge.
Sealed Box: Focal recommends sealed enclosure sizes from 0.99 ft³ to 1.41 ft³. Sealed enclosures provide the most control over a woofer, will handle a lot of power, and provide accurate sonic reproduction, making them suitable for all types of music.
Ported Box: Two ported enclosure volume options are listed in the manual; 1.24 ft³ (35 liters) with one 3.15" (8cm) diameter x 13.78" (35cm) long port and 1.77 ft³ (50 liters) with one 3.94" (10cm) diameter x 15.75" (40cm) long port. Ported (or vented) enclosures typically provide better overall efficiency than sealed, so they are suitable for use with smaller amplifiers, giving you more bass output from less power. However, this efficiency comes at the expense of very low frequency output.
Our Product Research Team
At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.
Why did you buy this?
Just replaced all of my other speakers with Focal and they sound incredible, but need more bass. Now adding an awesome sub to complete the installation. [ Alan Jun 20, 2018 ]
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