HK Audio LINEAR™ SUB 4000 - 2400W 2 x 18" Passive Subwoofer

The HK Audio LINEAR SUB 4000 is a powerful dual vented bandpass subwoofer, engineered to deliver exceptional low-frequency response for a variety of applications. With two 18" speakers and a robust housing, this subwoofer is designed for compatibility with all LINEAR 5 full-range speakers and mid/high units. Its impressive low-frequency performance ranges from 30 to 100 Hz, making it an ideal extension for the LINEAR 5 LTS long-throw powerhouse and the LINEAR SUB 2000, providing powerful low bass with optional frequency separation.

Impressive Power Handling

With a nominal power handling of 1200 W and a program power handling of 2400 W, the LINEAR SUB 4000 is built to handle high output levels without distortion. The maximum SPL reaches 137 dB, ensuring that this subwoofer can fill large spaces with powerful bass. Its frequency response of 31 Hz to the crossover point allows for deep and impactful sound reproduction.

Flexible Connectivity and Integration

Equipped with two Speakon NL4 connections, the LINEAR SUB 4000 allows for easy integration into existing audio setups. The pin assignment is switchable, offering flexibility for various applications. With an integrated pole mount for two M20 poles, this subwoofer can be paired with mid/high units for a complete sound system.

Durable Construction

Constructed from high-quality birch multiplex, the LINEAR SUB 4000 is built to withstand the rigors of live performances. Its acrylic enamel finish in black provides both durability and an appealing look. The front grille is made of 2 mm metal and backed with black acoustic foam to protect the speakers while maintaining sound quality.

Key Features

• Dual 18" speakers for powerful low-frequency output
• Power handling of 1200 W RMS and 2400 W program for high output levels
• Frequency response of 31 Hz – X-over for deep bass reproduction
• Max SPL of 137 dB for impactful sound in large venues
• Flexible connectivity with dual Speakon NL4 connections
• Integrated pole mount for easy setup with mid/high units

Specifications

• Power Handling Nominal (RMS): 1200 W
• Power Handling Program: 2400 W
• Frequency Response +/- 3 dB: 39 Hz – X-over
• Frequency Response -10 dB: 31 Hz – X-over
• Sensitivity 1 W @ 1 m: 106 dB (half space)
• Max SPL @ 10% THD: 135 dB (half space)
• Max SPL Peak @ 10% THD: 137 dB (half space)
• Electrical Impedance: 4 ohms
• Low/Mid Speaker: 1x 18", 4" voice coil featuring advanced ventilated voice coil gap
• Crossover Frequency: 100 Hz, active X-over with controller amp (can be set lower when used as a sub-low)
• Connections: 2x Speakon NL4, pin assignment switchable between 1+/1- and 2+/2-
• Integrated Pole Mount: 2x M20
• Carrying Handles: 8x MultiGrip
• Housing: Birch multiplex
• Finish: Acrylic enamel, black
• Front Grille: 2 mm metal grille backed with black acoustic foam
• Dimensions (WxHxD): 91 x 51 x 81 cm
• Weight: 57.1 kg / 125.9 lbs