Positioning | TOA Electronics IQ 18B specs

9. Positioning

When a bass loudspeaker is used in an environment with boundary surfaces, its placement affects its frequency response. When such effects are properly understood, they can be used to great effect in producing the desired sound quality without the aid of additional amplification.

Consider Figure 8a in the diagram below, here we see a loudspeaker in free field or anechoic conditions. We measure its sound pressure level at a distance D, and refer to this as our reference level, or 0 dB SPL.

If we now place a large reflective surface (i.e., a wall, ceiling or floor) next to the loudspeaker, Figure 8b, the sound that is radiated towards the boundary is reflected. As a result, the sound pressure level can increase by as much as 3dB (effectively doubling the available amplifier power). The loudspeaker is radiating its power into half as much space, this is known as half space loading. For each additional boundary, the SPL can increase by 3dB. Corner placement or eighth space loading can increase a bass speakers’ efficiency by up to 9dB.

This effect is not the same at all frequencies. Loudspeakers are only essentially omni directional at low frequencies (where the wavelength is large compared to the loudspeaker). At high frequencies sound radiates in a more directional manner. We can position full range loudspeakers next to a boundary in order to boost the lower frequencies while the highs remain unchanged.

Coupling, or placing bass cabinets together will also increase bass output.

Figure 8a

Figure 8b

Figure 8c

Figure 8d

IQ 18B specifications

The TOA Electronics IQ 18B is an advanced ceiling-mounted loudspeaker that is designed to deliver high-quality sound in various environments. Built with the latest audio technology, the IQ 18B is suitable for commercial spaces, educational institutions, and other settings where clear audio is essential.

One of the most notable features of the IQ 18B is its utilization of the proprietary TOA DSP (Digital Signal Processing) technology. This allows for sound optimization in different acoustic environments, ensuring that the speaker delivers clear and balanced audio regardless of its placement. The DSP enhances speech intelligibility and music fidelity, making it an excellent choice for applications that require reliable sound reinforcement.

The IQ 18B is equipped with an 8-inch coaxial speaker driver that produces a wide frequency response, ranging from deep lows to crisp highs. This ensures that the audio is not only loud but also rich and full-bodied. Additionally, the speaker includes a built-in high-performance amplifier, streamlining installation and reducing the need for external amplification equipment.

Another significant characteristic of the IQ 18B is its sleek and unobtrusive design. The low-profile appearance makes it a perfect fit for modern aesthetic spaces, blending seamlessly into various ceiling configurations. Furthermore, its build quality is robust, designed to withstand the rigors of continuous use in busy environments while providing lasting performance.

The IQ 18B also offers versatility in installation. It features a Power over Ethernet (PoE) capability, allowing for easier cable management and reducing installation costs. Furthermore, the speaker can be controlled remotely, giving users the flexibility to adjust settings from a distance, which is particularly beneficial for larger venues.

To enhance user convenience, the IQ 18B comes equipped with a front-mounted volume control and an LED indicator. This allows for quick adjustments and status monitoring without needing to access the rear of the unit, making it user-friendly for both operators and maintenance personnel.

In summary, the TOA Electronics IQ 18B stands out as a powerful and efficient loudspeaker solution. With its advanced DSP technology, quality speaker components, and user-friendly features, it is designed to meet the demands of various audio environments, ensuring consistent and high-quality sound reproduction.