You have to use strong and regulated soldering iron, but effect is very good, also for sound quality
Dayton Audio is a company with more than 20 years experience in the design and manufacture of audio products and components. Acoustic loudspeakers are one of their specialties. While most of the engineering and development work is done in the United States, Dayton Audio products are manufactured in North America, Europe and Asia. This geographical versatility allows for logistical advantages and assembly quality.