System Requirements, Amplifier considerations

user manual

QLight™ series

SYSTEM REQUIREMENTS

QLight™ series passive loudspeaker enclosures require only one amplifier channel for correct operation, the frequency splitting between the low frequency driver and the high frequency driver being accomplished by the internal passive crossover network built into each enclosure. If subwoofer enclosures are used as part of a bi-amplified system in conjunction with QLight™ series 2-way enclosures to extend low frequency response, additional amplifier channels and external electronic crossovers will be required. The Turbosound LMS-D6 and LMS-4 digital loudspeaker management systems are recommended for this purpose, as well as other professional quality digital controllers.

Bi-amplified loudspeaker enclosures require the use of one amplifier channel per frequency band for correct operation. Frequency splitting between the low frequency driver, and the mid and high frequency section drivers is accomplished by an external electronic crossover; while frequency splitting between the mid frequency driver and the high frequency driver in 3-way models (TQ- 445) is handled by an internal passive crossover.

Dedicated subwoofer enclosures require an additional amplifier channel when used as part of an extended frequency system. Frequency splitting between it and a QLight™ series mid-high enclosure is accomplished by an external crossover. Turbosound digital loudspeaker management systems are recommended for this purpose.

Amplifier considerations

Turbosound speaker enclosures should be driven by high quality power amplifiers designed for true professional use. Such amplifiers will have balanced inputs, DC and RF fault protection, and well designed cooling systems for reliability. Turbosound power amplifiers such as the T-45 and T- 25 are recommended for this purpose.

The program power listed in the loudspeaker’s technical specification is the best guide to the size of amplifier required for general purpose applications. The amplifier should therefore be capable of delivering long term broadband power equal to the loudspeaker’s program power rating at the loudspeaker’s stated nominal impedance. This approach allows sufficient headroom to generate good dynamic range.

RECOMMENDED AMPLIFIER POWER RATINGS:

The amplifier's rated r.m.s. continuous power output (20Hz – 20kHz, per channel) should be equal to the program power handling of the loudspeaker at its nominal impedance.

TQ series manual page 8