The additional bucking magnet is mounted on the back of the motor system and used to achieve semi magnetic shielding and higher magnetic flux density in the air gap of of Scan-Speak R2604/833000.
The key feature of Scan-Speak R2604/833000 are also a very low resonance frequency, as well as frequency range, extended to above 40 kHz.
Note: Danish made Scan-Speak R2604/833000 is the modern version of well-known VIFA XT25BG60-04 tweeter.
Scan-Speak R2604/833000 - information in PDF format (465 Kb)
Review in Hobby HiFi #2-2016 Magazine (in German, 768 kБ)
Review in Hobby HiFi #5-2016 Magazine (in German, 747 kБ)
Manufactured by: Scan-Speak ♦ Model: R2604/833000 ♦ Origin: Denmark ♦ Shipping Weight: 1.1 kg
(*) Prices are per unit, excluding Value Added Tax (VAT 24%)