Electrovoice TX 2181

An Electro-Voice Subwoofer Designed to Integrate into a TX System

The TX2181 is a passive Electro-Voice subwoofer developed to reinforce the low end of the spectrum in a sound reinforcement setup. Its dual 18-inch format has a clear goal: to deliver level, density, and bass extension suited to contemporary music, while remaining coherent with satellite speaker coverage and appropriate filtering. In a product range, this type of subwoofer typically serves as the system's foundation: it handles the low-frequency energy while the main speakers focus on midrange clarity and high-frequency definition.

The advertised "omnidirectional" coverage corresponds to the expected behavior of a subwoofer: low frequencies propagate widely, facilitating integration in various rooms. To optimize spatial distribution, placement (floor, cluster, cardioid if the system allows) and filtering are the main levers.

Who Is the TX2181 For and In Which Applications Does It Excel?

The TX2181 is aimed at users who need solid and physical bass : contractors, bands, concert venues, clubs, houses of worship, mobile stages, or fixed installations seeking a more present low end. Thanks to its two 18-inch drivers, it is particularly relevant when you want to feel the kick drum, electric bass, or electronic sub-bass without pushing the main speakers.

As it is a passive subwoofer, it requires suitable external amplification and properly set processing (low-pass filter). It can thus integrate into an existing rig (amplifier + processor/filtering) and allow precise sizing based on the venue, musical style, and target level.

Filtering, Performance, and Construction: What Makes the Difference

Recommended Filtering for a Clean Crossover with the Satellites

Electro-Voice recommends a crossover frequency of 80 to 120 Hz in low-pass mode. This range is practical: 80 Hz favors a cleaner, more "hi-fi" crossover when the satellites extend well downwards, while 100 to 120 Hz can help relieve smaller main speakers. The goal is to achieve tight bass without bumps at the crossover and better overall system headroom.

Frequency Response and Bass Sensation

The specified frequency response at -3 dB (50 Hz to 160 Hz) places the TX2181 in a typically useful sound reinforcement range, focused on bass impact and warmth. The -10 dB response (40 Hz to 1.5 kHz) gives an idea of possible extension depending on EQ, filtering, and configuration. In practice, careful tuning (crossover, filter slope, phase) is crucial to achieve bass that hits without masking the rest of the mix.

Durability and Field-Oriented Finishing Details

The enclosure combines plywood and MDF with an EVCoat finish, designed to withstand handling and transport. The 16GA galvanized powder-coated steel grille protects the drivers, and the rotatable logo is a simple but useful detail when the subwoofer is positioned differently (horizontal/vertical) or used in stacks. Weighing 56.1 kg, it is a serious-sized unit: the typical format of a dual 18-inch subwoofer intended to deliver level and headroom.

Technical specifications

Bluetooth

No

Model	Electro-Voice TX2181	Horizontal and vertical coverage	omnidirectional
Type	passive subwoofer	Power handling	1000 W RMS (4000 W peak)
Low-frequency drivers	2 x EVS-18S, 18 inches (457 mm)	Nominal impedance	4 ohms
Frequency response (-3 dB)	50 Hz - 160 Hz	Cabinet	plywood and MDF with EVCoat finish
Frequency response (-10 dB)	40 Hz - 1.5 kHz	Grille	16GA galvanized powder-coated steel with rotatable logo
Recommended crossover frequency	80 - 120 Hz (low-pass)	Dimensions (H x W x D)	1154 x 508 x 691 mm
On-axis sensitivity	103 dB (1 W/1 m)	Net weight	56.1 kg
Calculated max SPL	138 dB