dB Technologies SUB 18H Semi Horn-Loaded Active Class-D Subwoofer (18", Black)

dB Technologies
dB Technologies SUB 18H Semi Horn-Loaded Active Class-D Subwoofer (18", Black)
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dB Technologies SUB 18H Semi Horn-Loaded Active Class-D Subwoofer (18", Black)

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dB Technologies SUB-18H Overview

The black SUB 18H Semi Horn-Loaded Active Class-D Subwoofer from dBTechnologies features a 18" woofer with a 4" voice coil, driven by a high-efficiency Digipro G3 Class-D digital amplifier with 1500W program and 2000W peak power. Thanks to the hybrid horn-loading configuration, the woofer can be tuned to the lowest frequencies, improving system efficiency and providing a deep, enveloping sound—even at close listening distance—which makes it suitable for small venues.

The SUB 18H Subwoofer offers stereo inputs with selectable link or crossover outputs, a crossover frequency switch at 90 or 120 Hz, a phase-inversion switch, and built-in delay up to 4.5 ms, which is adjustable in 0.5 ms steps. It features delay control that allows sound-alignment between the subwoofer and speaker. It also feature a mini USB Type-B port to update system firmware and retrieve a telemetry log file that provides information on abnormal events, usage time, and amplifier status.

The unit uses SMPS technology auto-ranging digital power supply that allows operation on 110 or 220 VAC. The 28-/56-bit DSP with 24-bit/48 kHz A/D conversion allows you to control the audio crossover of the acoustic components, frequency response, limiter, and phase alignment. The unit's Hybrid Enclosure Technology housing features a birch plywood cabinet coated with PVC, aluminum heavy-duty handles for easy transportation, and polypropylene edges that protect it from scratching or impacts during transport. The subwoofer can be pole mounted using the M20 threaded mount plate on the top of the cabinet.

Main Highlights

Active semi horn-loaded subwoofer
1000W Digipro G3 Class-D digital amplifier
28-/56-bit DSP with 24-bit/48 kHz A/D conversion
Crossover frequency of 90 or 120 Hz, 24 dB/Octave
SMPS with auto-ranging power supply unit for 110 or 220 VAC operation
Delay switch up to 4.5 ms (step of 0.5 ms)
PVC-coated birch plywood cabinet
Standard M20 pole-mount plate on the top of the cabinet


Suitable for music playback and sound reinforcement for small and mid-sized venues like clubs, ballrooms, live theater, houses of worship, retail, restaurants/bars, corporate events
Used with portable PA systems
Used with the audio-visual systems in small-sized venues

dB Technologies SUB-18H Specs

TypeSemi horn-loaded active subwoofer
Frequency Response35 to 120 Hz (-6 dB)
28 to 150 Hz (-10 dB)
Maximum Sound Pressure Level (SPL)134
Driver18" (46 cm) woofer with 4" (10.1 cm) voice coil
AmplifierAmp Technology: Digipro G3
Amp Class: Class-D
Power PRG: 1500 W
Peak Power: 2000 W
Power Supply: 1000 W SMPS with PSU auto-range (110 and 220 V)
Controller28-/56-bit DSP
AD/DA Conversion24-bit / 48 kHz
LimiterDual Active, RMS / Peak, Thermal
Crossover Frequency90, 120 Hz
Crossover Slope24 dB/Octave
ControlsCrossover frequency selection
Delay switch up to 4.5 ms
Phase inversion switch
Outputs mode switch (Link/Crossover)
Mini-USB type-B port (service data)
ConnectorsSignal Input: 2 x XLR
Signal Output: 2 x XLR Crossover out / Link out
HousingBirch plywood, black PVC cover
Dimensions (W x H x D)20.6 x 28.0 x 27.4" (52.4 x 71.1 x 69.5 cm)
Weight91.3 lb (41.4 kg)
Packaging Info
Package Weight108.25 lb
Box Dimensions (LxWxH)31.5 x 31 x 24"
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