ATC - USA ATC C4 Sub Mk2 12" Subwoofer

ATC C4 Sub Mk2 12" Subwoofer Key Features

• High performance sealed box design using 12"/314mm ATC proprietary sub driver.
• Ideal partner to SCM19, SCM20, SCM40, SCM50 & SCM100.
• Suitable for use in stereo, home cinema and AV applications.
• On-board 300W convention cooled discrete MOSFET class A/B amp.
• 2 x balanced XLR inputs 2 x balanced XLR outputs (un-filtered/processed).
• User adjustable gain, low pass frequency, polarity and phase set

Product Description

The ATC C4 Sub Mk2 stands as a pinnacle of audio engineering, featuring a 12" active subwoofer meticulously crafted to complement ATC's active and passive loudspeaker series. Engineered with a sealed-box design, it strikes an ideal balance between sub-bass extension and precise driver control. The C4 Sub Mk2's cabinet is crafted from heavy, inert materials to minimize coloration for pristine sound.

Harnessing the power of the SS75-314SC driver, this subwoofer system masterfully reproduces the lowest audio octaves with minimal distortion. Its convection-cooled amplifier resides discreetly within the rear cabinet. Equipped with balanced inputs and outputs, it seamlessly integrates into stereo, multi-channel, or immersive audio setups.

Fine-tuning is effortless with a 21dB gain control range, three low pass frequency settings, polarity switch, and a 180-degree phase setting. Whether partnered with loudspeakers or external processing, it adapts flawlessly, catering to a wide spectrum of preferences.

Moreover, its amplifier features intelligent fault monitoring, indicated by a single red LED, ensuring seamless operation. A latching footswitch, connected through a ¼"/6.35mm jack, allows easy muting of the subwoofer output without affecting the primary loudspeakers.

Acoustic Specifications

Drive Unit - Bass: 1 x SS75-314SC 8Ω

Low Frequency Cut-off: 22Hz (-6dB, half space, low pass filter set at 80Hz).

Low Pass Filters: 50Hz, 65Hz, 80Hz, 320Hz. (-6dB, 4th order Linkwitz Riley).

Max SPL: 110dB continuous, 116dB peak (IEC Weighted Pink Noise, 1m, half space, low pass filter @ 80Hz).

Sensitivity: +4dBu ref. 88dBC (single channel driven, Gain +6dB, Level 0dB, pink noise, low pass filter @ 80Hz)

Electronic Specifications

Amplifier Type: Grounded Source MOSFET based Class A-B, convection cooled.

Output Power: 300W in to 8Ω

THD+N: <0.003%/-90dB, at 100Hz, 300W into 8Ω over 90kHz bandwidth

Balanced Inputs: 2 x Rear Panel Mounted Female XLR, pin 2 hot.

Input CMRR: 90dB at 200Hz.

Input Impedance: 20kΩ (differential).

Balanced Outputs: 2 x Rear Panel Mounted Male XLR, pin 2 hot.

Output Impedance: 100Ω (differential).

Frequency Response: <2Hz (-3dB) – 320Hz (-6dB, set by panel-controlled LP filter).

Low Pass Filters: 4th Order Linkwitz Riley

Gain Control: 0, +6dB, +10dB.

Level Control: 0dB -11dB in 1dB steps. Total range 21dB with use of Gain switch.

Phase Control: 0-180° ref. Input.

Polarity Control: In-phase/Out-of-phase ref. Input.

Limiter: ATC Active FET Momentary Gain Reduction.

Sensitivity: 1.55Vrms for full power (single channel driven, Gain 0dB, Level 0dB)

Mains Input: 220-230V or 115V – Factory set. Please observe panel markings and labels!

Power Consumption: Idle 8W/14VA. 1/8th Power 170W/230VA. Full Power 500W/600VA

Finishes: Walnut, Oak, Cherry, Black Ash, Black Satin, White satin. Additional veneers and finishes can also be special ordered, please contact our sales team for more information

Additional: Mute via ¼"/ 6.35mm Jack socket, controlled via latching footswitch. Footswitch supplied separately, latching type, ¼"/6.35mm jack connection.

Dimensions and Weight

Overall - 22 5/16" H x 18 1/4" W x 19 11/16" D (568 x 464 x 500 mm)

Product Weight - 92.6 lbs (42 kg)