Equalisation, Dispersion, Cooling | Turbosound TQ-440SP instruction

user manual

QLight series

Equalisation

Because the TQ-440SP features a smooth and even frequency response, it does not need equalisation or correction to overcome the deficiencies often found in lesser designs.

Should extended frequency response be required at more than medium sound pressure levels, the use of the complementary TQ-425SP self-powered subwoofer is strongly recommended

In order to compensate for the room acoustics, the TQ-440SP requires only minimal equalisation. As in any system, over-equalisation introduces phase shifts, distortion and a reduction in headroom, usually causing more problems than it cures.

Under most circumstances a 1/3 or 1/2 octave graphic equaliser will generally be adequate, with the fader settings applied smoothly and as little as possible for the required room compensation. Most rooms will have resonances that will be excited at particular frequencies needing some cut to help tame the sound, these problems are most pronounced at the lower frequencies where speakers generally exhibit very little directional control.

If you find that the system needs a lot of boost at lower frequencies you may need additional sub- bass units as stated above. It is good practice to use as little equalisation as possible, aiming to cut frequencies rather than adding large amounts of boost.

Dispersion

One of the design features of the TQ-440SP is its tightly controlled 60º horizontal by 40º vertical nominal dispersion pattern at mid and high frequencies. This gives many user advantages and eases placement decisions, being essentially a point and shoot system. A 60º horizontal polar pattern equals an angle of 30º either side of the centre line at which the sound pressure level is 6dB down with respect to centre, (averaged over the whole frequency range of the loudspeaker). Thus a 40º vertical dispersion gives an angle of 20º above and below the horizon.

Cooling

The TQ-440SP amplifiers are normally cooled by the action of convection from the large heatsink mounted externally to the amplifier module at the rear of the enclosure. It is important to leave sufficient space around and especially above the heatsink to allow the convection of heat away from the loudspeaker. Under the majority of circumstances this cooling effect is sufficient to maintain the amplifiers within a normal operating temperature range. In conditions of high ambient temperature and/or in very confined spaces, the use of an external fan module is recommended. A 24 volt socket is provided on the rear panel for that purpose.

TQ-440SP manual page 11

TQ-440SP specifications

The Turbosound TQ-440SP is a powerful and versatile subwoofer that has made a significant impact in the world of professional audio. Designed with precision and performance in mind, the TQ-440SP stands out for its ability to deliver deep, impactful bass while maintaining clarity and balance across various applications.

One of the main features of the TQ-440SP is its robust construction. Built with a durable wooden enclosure, it provides both strength and resonance control, ensuring that the sound produced is not only loud but also clean and distortion-free. This is essential for live sound reinforcement, as well as installed applications in venues such as clubs, theaters, and concert halls.

The TQ-440SP is equipped with a high-performance 18-inch driver that is engineered to handle high power levels and produce exceptional low frequency output. This driver technology allows for an impressive frequency response, reaching down to 30Hz, which is crucial for genres that rely heavily on bass, including electronic, hip-hop, and orchestral music.

Another noteworthy technology in the TQ-440SP is its advanced system processing. The integrated digital signal processor (DSP) features advanced algorithms for crossover, limiting, and equalization, allowing users to tailor the subwoofer's performance to match specific room acoustics or system configurations. This capability enhances overall sound quality and ensures optimal performance, regardless of the setting.

Moreover, the TQ-440SP is designed for easy integration with other audio components. Its dual-input connectors accommodate a variety of input options, making it versatile enough to work with different mixing consoles and amplification setups. Additionally, it can be combined with Turbosound's other loudspeakers to create a cohesive sound system that delivers full-range audio experiences.

Portability is another consideration in the design of the TQ-440SP. Weighing in at a manageable level, it can be transported and set up with relative ease, making it an excellent choice for mobile applications such as touring and events.

Overall, the Turbosound TQ-440SP is more than just a subwoofer; it is a comprehensive solution for sound professionals seeking high-quality, reliable low frequency performance. Its combination of powerful drivers, advanced processing, and practical design features make it a go-to choice for demanding sound applications, setting a standard in the realm of professional audio equipment.