EJ45TT normal tension is D'Addario's best selling Dynacore set, preferred for its balance of rich, projecting tone and comfortable feel. D'Addario Premium Pro-Arté DynaCore sets are constructed using exclusive multifilament stranded core material with a revolutionary winding technique. The result is a truly unique and contemporary tone - rich, round and full with dramatically improved string life, tuning stability and consistency. This set is complimented by our titanium trebles (bright and projecting) for optimal tonal balance.