Q Acoustics Q SUB Series

All Q SUB series models have exceptional bass power to cabinet size ratio. Digital Signal Processing (DSP) allows easy system and room integration with optimised settings for class-leading, distortion-free performance. Clever, dual-phase, and delay controls allow the fine-tuning of the signal alignments for flexible room placement. DSP identifies the input signal and automatically adjusts system gain, enhancing performance regardless of the connected source. A low-pass filter with frequency adjustment ensures seamless integration with any partnering speaker system. A custom-designed amplifier module features four digital power amplifier stages that improve efficiency by dissipating less heat, enhance speaker control, and reduce output impedance. 

An infinite baffle box design presents a tighter and more focussed bass response, combining with DSP for very precise tuning to achieve the best acoustic response possible. Internal Dart-bracing improves mechanical stability, reduces cabinet ballooning, and ensures optimal performance under high internal pressure. A 12V trigger input allows automatic power-up when a trigger signal is present.The deep bass from a subwoofer is often considered omnidirectional, allowing flexibility in placement. While true in isolation, real audio systems require careful integration of the subwoofer with other speakers to ensure accuracy of alignment, especially at the crossover point.

Placement impacts sound arrival timing, and phase alignment issues can arise even with adjacent placement, affecting system frequency response. The Q SUB range uses Digital Signal Processing (DSP), alongside fine delay adjustments and phase inversion switch, to address these integration challenges. This technology enables users to optimise settings for a class-leading performance, ensuring seamless integration without needing professional installation.

Subwoofers need an adjustable low-pass filter to match their upper frequency response with the diminishing bass of other speakers. The Q SUB range features a low pass filter with frequency adjustment from 40 Hz to 250 Hz, setting the -6 dB point. This wide range ensures the Q SUB models can seamlessly integrate with and complement the low-frequency response of any partnering speaker system.

Subwoofers must accommodate a wide variety of sound input sources, including stereo preamp outputs or mono feeds from active speakers or home cinema systems. The Q SUB range uses a complex algorithm inside the DSP to identify the input signal type - stereo or mono, and the level - and automatically adjusts system gain. This ensures optimal signal to noise levels and dynamic range, enhancing performance regardless of the connected source.

The Q SUB amplifier offers multiple standby modes to suit various system needs. Auto detection powers the subwoofer when a signal is detected, reverting to standby after 20 minutes of inactivity, while a low-consumption power supply keeps power consumption during standby mode to an absolute minimum. A 12V trigger input allows automatic power-up when a trigger signal is present. Alternatively, the subwoofer can be set to remain permanently powered.

The Q SUB amplifier module, custom-designed by Q Acoustics, includes a DSP, power amplifier, and power supply. It features four digital power amplifier stages in a parallel bridge-tied load (PBTL) configuration, enhancing efficiency and speaker control by reducing output impedance and heat dissipation. This design can deliver up to 300W continuous and 600W peak power, with exceptional THD performance of less than 0.1% up to 300W. An intelligent protection system constantly monitors the electronics to ensure that the amplifier and power supply are fully protected in the unlikely event of excesses of temperature.

The drive units feature a heavy-duty steel chassis, paper cone, and rubber surround. Bass unit diameters are 203mm (Q SUB80), 254mm (Q SUB100), and 305mm (Q SUB120). Voice coils are 38mm for Q SUB80/100 and 50mm for Q SUB120, with an aluminium demodulation ring for reduced inductance-induced modulation distortion. An infinite baffle (sealed box) design is ideal for a subwoofer. Acoustically, this will present a tighter and more focused bass response and, coupled with the DSP, allows for very precise tuning to achieve the best acoustic response possible. With no port to accommodate, the subwoofer is also easier to place in proximity to walls, corners, and furniture than a ported design.

The Q SUB cabinets are made from 18mm high-density MDF with a 36mm double-thickness baffle for exceptional rigidity. Internal dart bracing provides mechanical grounding for the drive unit, as well as mechanical stability, reduced cabinet ballooning, and ensures optimal performance under high internal pressure. A sealed enclosure also prevents air leaks through the amplifier mountings, while the 15mm MDF grilles are securely fixed to prevent rattling. Adjustable, locking spikes and spike cups are included for floor-leveling and protection. The Q SUB series arrives in two modern but classic finishes - Satin Black with a black grille or Satin White with a grey grille. The new models join the slimline 3060S to complete Q Acoustics' subwoofer family. Q Acoustics SUB80 (8-inch) is available now, priced  749/$899, SUB100 (10-inch) is  875/$1,049, and the SUB120 (12-inch) is  999/$1,199. Info and photos by Q Acoustics.