TOA Electronics IQ 18B 100 17.0 35.0 11.0 22.0 14.0 Polarity Checking, Operation

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CABLE RUN

C.S.A. OF EACH

CABLE

% POWER LOSS

% POWER LOSS

(m)

CONDUCTOR (mm)

RESISTANCE Ω

INTO 8Ω LOAD

INTO 4Ω LOAD

10

2.5

0.14

1.7

3.5

 

4.0

0.09

1.1

2.2

 

6.0

0.06

0.73

1.5

25

2.5

0.35

4.3

8.6

 

4.0

0.22

2.7

5.4

 

6.0

0.14

1.8

3.6

50

2.5

0.69

8.6

17.0

 

4.0

0.43

5.4

11.0

 

6.0

0.29

3.6

7.2

100

2.5

1.38

17.0

35.0

 

4.0

0.86

11.0

22.0

 

6.0

0.58

7.2

14.0

4. Polarity Checking

It is most important to check the polarity of the wiring. A simple method of doing this is to use a pulse based polarity checker for LF units. Connect the speaker leg which you believe to be connected to Pin 1 to the +ve terminal of the amplifier and likewise Pin 2 to the –veterminal of the amplifier. Check the phase as instructed by the polarity checker manufacturer. If you have wired it correctly, the polarity checker should indicate the LF unit is wired in phase, indicating the wiring is correct. If however the polarity checker indicates negative phase, the input connections must be inverted.

If problems are encountered, inspect the cable wiring in the first instance. It should also be noted that different amplifier manufacturers utilise different pin configurations and polarity conventions. If you are using amplifiers from more than one manufacturer, check the polarity at the amplifiers as well as the loudspeakers.

5. Amplification & Power Handling

As with all professional loudspeaker systems, the power handling is a function of voice coil thermal capacity. Care should be taken to avoid running the amplifier into clip (clipping is the end result of overdriving any amplifier). Damage to the loudspeaker will be sustained if the amplifier is driven into clip for any extended period of time. Headroom of at least 3dB should be allowed. When evaluating an amplifier, it is important to take into account its behaviour under low impedance load conditions. A loudspeaker system is highly reactive and with transient signals it can require more current than the nominal impedance would indicate.

Generally, a higher power amplifier running free of distortion will do less damage to the loudspeaker than a lower power amplifier continually clipping. It is also worth remembering that a high powered amplifier running at less than 90% of output power generally sounds a lot better than a lower power amplifier running at 100%. An amplifier with insufficient drive capability will not allow the full performance of the loudspeaker to be realised.

It is important when using different manufacturers amplifiers in a single installation that they have very closely matched gains, the variation should be less than ±0.5dB. This precaution is important to the overall system balance when only a single compressor/limiter or active crossover is being used with multiple cabinets; it is therefore recommended that the same amplifiers be used throughout.

6. Operation

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Contents PowerDual IQ 18B Page Contents Page Unpacking Connectors/CablingIntroduction Pin 1+ Positive Negative11.0 Amplification & Power Handling17.0 100 17.0 35.0 11.0 22.0 14.0 Polarity CheckingDimensions EqualisationPositioning Flying Flying an iQ 18B Flying Double iQ 18BFlying an iQ 18B with iQ Flying Double iQ 18B and iQ Performance Data Technical Specifications 10% Full Power 100 Hz Recommended Amplifier PowerPower Handling Full PowerWarranty Customer Services CoatbridgeScotland Page Tannoy is a member of the Group of Companies

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.
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