ADAM Audio Sub 2100 21.5″ Subwoofer


21.5″, 1200-watt subwoofer

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SKU: ADAASUB2100 Categories: , Brand:

The ADAM Sub2100 is a powerful 21.5″ subwoofer with a 1,000-watt, Class D amplifier with the world’s largest voice coil, and an astounding bass extension down to 18Hz

In the Sub2100, it’s safe to say that ADAM Audio has created a nuclear subwoofer to explore the deepest depths of bass. It’s no secret that low-frequency wavelengths are the longest, and therefore, to be accurately captured or reproduced, require a large diaphragm or speaker cone. In short, when it comes to accurate bass reproduction, size matters. Enter the ADAM Sub2100, a powerful, 1,000-watt subwoofer with a staggering 21.5″ woofer equipped with the world’s largest 6″ voice coil. However, size alone is not the point of the Sub2100. It wouldn’t be ADAM if sound quality, accuracy, and detail weren’t a major concern. The Sub2100 features a bass reflex enclosure tuned for reproducing frequencies down to a phase-coherent 18Hz. The sheer power and extremely high efficiency (99dB/ W/m) of the Sub2100 enable this system to produce linear SPL peaks of ≥128dB without any significant compression. The Sub2100 is designed for large control rooms and post-production facilities.

ADAM Sub2100 in one take:

  • 21.5″ subwoofer (paper)
  • The world’s largest voice coil; 6″
  • Amplifier power: Class D, RMS / Music: 1000W/1200W
  • Frequency response ranging from 18Hz to 150Hz
  • Maximum peak SPL at 1 m: ≥128dB

The world‘s largest voice coil

Essential to the volume of this woofer is its enormous 6″ voice coil, which is the world’s largest. Equipped with this voice coil, the Sub2100 is capable of reaching the highest SPLs in the lowest frequencies that can be perceived by the human ear. On every level, the Sub2100 establishes a new benchmark in subwoofer technology.

Efficient PWM amplifier

The Sub2100 is powered by a 1,000-watt PWM (pulse-width modulation) or Class D amplifier. Instead of linear power regulation used in Class A/B amplifiers, which leads to energy losses in power transistors, Class D amplifiers use switching transistors. Nearly no energy loss occurs at the transistor and nearly all the power is carried to the transducer. This amplifier produces over 90% efficiency and can handle critical passages without overheating for long periods of time.

Controls and connectivity

In order to adjust the sound of the Sub2100 to accommodate various room characteristics, there are several controls, including volume (-60dB to +6dB) and crossover frequency adjustment (50Hz – 150Hz). The satellite speakers can either be driven full range or high-pass filtered at 85Hz, which allows the Sub15 to be integrated into a Dolby surround setup. There is also a phase-reverse switch, to correct phase relationships between the satellites and the subwoofer.

The Sub15 also has flexible connectivity, including balanced (XLR) and unbalanced (RCA) input/output connectors on the rear panel. An additional output allows you to cascade as many subwoofers as needed.

The ADAM Sub2100 is built for large control rooms (the kind that can fit a 747) and post-production facilities, or those who simply can’t get enough bass. For more information, call or chat with your Westlake Pro Sales Consultant today.


ADAM Sub2100 specifications:

  • Subwoofer basket: 21-1/2″ (543mm)
  • Voice coil: 6″ (150mm)
  • Woofer material: paper
  • Built-in amplifier: 1
  • Subwoofer channels: 1/2 200W/300W
  • Frequency response: 18Hz – 150Hz
  • THD: >60 Hz ≤ 1%
  • peak: ≥ 128 dB
  • Crossover frequency 50 Hz – 150 Hz
  • Inputs: XLR / RCA
  • Input impedance: 10k ohm
  • Weight 85 kg / 187.4 lb.
  • Dimensions (H x W x D): 33-1/2″ x 23-1/2″ x 28″ (850 x 600 x 705mm)
  • Warranty: 5 years
  • Operating temperature: 0° C to 40° C (32° F to 104° F)
  • Storage temperature: -30° C to 70° C (-22° F to 167° F)
  • Humidity Max.: 90% not condensing

Additional information



Frequency Response

18Hz – 150Hz






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