X-bit labs

Hi-End HiVi Swans S200A Stereo System Review: Elegance of a Piano (page 5)

Category: Multimedia

by Sergey Samarin

[ 04/24/2007 | 05:57 PM ]

System tweeter.

The system is equipped with Hi-End neodymium tweeters with 28mm membranes. The tweeter dome is made of reinforced polymer. The high-frequency driver is placed into isolated resonance-free casing, which protects it against woofer’s influences. The nominal DC impedance of the tweeter is 6Ohm, own resonance frequency – 1350Hz. The tweeter is screwed to the metallic pad that serves as a megaphone.

You can see distortions because of the non-optimal acoustic design of the tweeter dome.

The graph above shows very unfavorable amplitude-frequency characteristic (AFC) for filtering; at 30 degree angle the AFC improves a little bit – it may result from the non-optimal acoustic design of the tweeter dome. As a result, the manufacturer had to use a third order filter with Q-factor of about 1, which also increases the distortions.