![introduction 1](/images/new-backgrounds/21394/213949x1.webp)
introduction 1
welcome
Congratulations on your purchase of a new LT / ST Series professional power amplifier and thank you for your con- fidence in Crest Audio products. You are among the growing number of audio professionals who have made Crest Audio one of the world’s leading suppliers of professional and commercial/industrial audio systems.
For your safety, please read the Important Precautions section before installing and operating the amplifier.The Crest Audio LT and ST Series amplifiers are designed for high operating efficiency and accurate sonic performance across the full audio bandwidth, even under stressful conditions.
The Crest Audio LT and ST series both utilize Class D amplifier technology which greatly improves the efficiency of the amplifier and reduces the power demand from the mains supply.The LT amplifier incorporates a linear power supply whereas the ST uses a resonant switching supply with power delivery characteristics similar to a linear sup- ply but with greatly reduced weight. Both power supply designs are built to the same uncompromising standards. This, combined with major advances in amplifier technology provides for extreme reliability and sonic accuracy for which Crest products are renown.
The Crest audio LT series and ST series amplifiers differ in power supply design,electrical efficiency and weight how- ever, their feature sets are identical. For this reason, the majority of this users manual applies to both models.
LT linear-toroid power supply
A traditional linear power supply is used in the LT Series. Because of the amplifier sections efficiency, (approx 93%) the transformer does not need to be as big or as heavy.This gives the LT Series an advantage in deliver- ing more power in a more compact package.
The efficiency of the output stage also gives the power supply the ability to handle
ST resonant-switching power supply
The ST amplifier switching power supply employs a resonant design which utilizes
Benefits of
•reduced power component stress for better reliability and efficiency
•20dB lower noise than conventional switching supplies (and therefore more EMC friendly)
•behaves like a classic linear supply, but with the added advantages of size and weight reduction
In order to maintain strict quality assurance standards, all Crest Audio power amplifiers are built in our
This proven combination of advanced design,quality construction and comprehensive circuit protection is your guar- antee of
p.3