Turbosound TCS COMPACT SERIES Manuale Utente

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user manual 
TCS Compact series 
 
tcs compact manual 
page 19 
 
Crossovers and Processors 
In order to correctly set up your sound system a selection of audio processing devices are 
necessary to divide the frequencies between the speakers, apply equalisation and limit 
the dynamic headroom. These duties can be performed by proprietary units such as 
standalone crossovers, graphic equalisers and limiters, and a TCS Compact series 
installation can be built in this way by paying careful attention to details such as 
appropriate crossover settings. This information is provided in the Technical 
Specifications for each TCS Compact series speaker. 
Active and Passive systems 
Passive crossover networks split the frequency range between drivers after the amplifier.  
Although this an economical method for many general purpose applications, problems 
associated with this approach include the loss of energy (watts) as heat in the 
components of the crossover.  Also, it is not possible to design steep roll-offs, as a broad 
range of frequencies has to be covered by both components. This causes smearing 
between the drivers and potentially raises the distortion from the individual components. 
If the headroom limit of the amplifier is reached the HF component can be heard 
‘pumping’, as large amounts of energy are consumed by the low frequency transients. 
In an active system the crossover is placed before the amplifiers to gain particular 
advantages. More amplifier channels are needed to deal with the split of frequency bands 
but this separation also helps to deliver a cleaner, more controlled sound from the 
speakers. The HF cannot be modulated by power drains needed by the LF speakers. 
Loudspeaker Management Systems 
The concept of a Loudspeaker Management System is to provide all the processing 
electronics you might need in one box. This typically includes crossover functions, 
equalisation, limiters, delays and preset memories, that can store different set ups for 
various applications. A loudspeaker management system offers potentially better audio 
quality, more precise control and protection against unwanted changes in settings. 
Digital processing enables steeper roll-offs through the crossover areas to be designed, 
allowing more output from the speakers, as they are individually handling more 
appropriate bandwidths. Also, the addition of delay to the LF signal to match the arrival 
of the HF can help to make the image more intelligible. Therefore, it is much easier, and 
more efficient, to manipulate audio digitally in low voltage electronics than in the passive 
crossover networks found inside speakers. 
The TCS Compact series has a range of sub bass units (TCS-115C, TCS-118C, TCS-215C, 
TCS-218C) that are designed to be used actively with the mid/top cabinets (TCS-081C, 
TCS-101C, TCS-121C, TCS-151C). The Turbosound LMS-D24 and LMS-D26 loudspeaker 
management systems contain custom presets for the TCS Compact series along with a 
world-class audio specification.