Cable choice consists mainly of selecting the correct cross sectional area in relation to the cable length and the load impedance. A small cross sectional area would increase the cables series resistance, inducing power loss and response variations (damping factor).

Connectors should be wired with a minimum of 2.5 sq. mm (12 gauge) cable. This will be perfectly satisfactory under normal conditions. In the case of very long cable runs the wire size should exceed this, refer to the following table for guidance: -

 

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. 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.

5. Operation

For optimal performance, the iQ 10 has been designed to operate in conjunction with the Tannoy TDX1 & TDX2 System Controllers, and iQ 18B bass unit for extended bass performance. The TDX controllers have been factory preset to provide the recommended eq, crossover points, and overall system balance. Please refer to the TDX1 & TDX2 manual for operation.

If you intend using an alternative loudspeaker management system (e.g. BSS™, KlarkTeknik™, XTA™ etc) please refer to section 12 of this manual.

5

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3Com iQ 10PC, iQ 10C user manual 100 17.0 35.0 11.0 22.0 14.0 Amplification & Power Handling
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iQ 10, iQ 10C, iQ 10P, iQ 10PC specifications

3Com, a pioneer in networking technology, has made significant strides in the development of its iQ series. Among its notable offerings are the iQ 10PC, iQ 10P, iQ 10C, and iQ 10 models, each designed to deliver optimal performance in network management and connectivity.

The 3Com iQ 10PC is engineered for personal computing environments, facilitating seamless connectivity with its robust suite of network protocols. It features an integrated wireless module that supports both 2.4 GHz and 5 GHz bands, ensuring flexible and reliable connections. Its compact design is tailored for desktops or small office setups, and it boasts advanced security features like WPA3 encryption, which safeguards data from unauthorized access.

Next in line, the iQ 10P is tailored for professional use, specifically in enterprise-level settings where high performance is essential. It incorporates Power over Ethernet (PoE) technology, allowing users to power devices like IP phones and security cameras through the network cable. This capability not only simplifies cabling but also enhances the overall efficiency of the network infrastructure. The iQ 10P is equipped with enhanced Quality of Service (QoS) features, which prioritize bandwidth for critical applications, ensuring that voice and video calls remain clear and uninterrupted.

The iQ 10C stands out for its collaborative features, making it ideal for team environments. It integrates cloud management capabilities, enabling IT administrators to remotely monitor and manage network performance from any location. The inclusion of advanced analytics provides insights into network usage, helping organizations optimize their resources and improve user experience. Additionally, the iQ 10C supports seamless integration with various cloud applications, which allows for enhanced productivity and collaboration among teams.

Finally, the iQ 10 model is a versatile all-rounder, designed for a wide range of applications from home to enterprise. It features a multi-gigabit Ethernet port and comprehensive support for both IPv4 and IPv6, ensuring future-proof connectivity. Its adaptive QoS ensures optimal performance for various data types, while robust firewall features help protect the network from external threats.

Together, these models illustrate 3Com's commitment to innovation, providing users with powerful tools to meet the demands of modern networking. Each device in the iQ series embodies a blend of cutting-edge technologies, focusing on security, performance, and user-centric design, making them integral to any network infrastructure.
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