BlieSMa T25A-6

Compact tweeter with aluminium‑magnesium dome.

The key feature of the Bliesma T25A‑6 is its 25‑mm aluminium‑magnesium alloy dome with variable thickness, designed to achieve an ultrasonic first breakup mode and maintain low moving mass for accurate high‑frequency reproduction.

The fully saturated neodymium motor is equipped with a copper sleeve to reduce nonlinear and modulation distortion. The underhung voice coil, wound in two layers from CCAW wire on a titanium former, minimizes thermal compression and ensures stable performance without the use of ferrofluid.

The T25A‑6 features an aluminium front flange and an aluminium rear chamber, both powder‑coated for durability. The rear chamber is filled with natural wool damping to suppress internal reflections, and the gold‑plated terminals ensure long‑term connection reliability.

To protect the dome, the tweeter is equipped with a non‑removable metal grille.

• Nominal impedance [Zn]: 6 Ω
• Recommended frequency range: 2.2…35 kHz
• Sensitivity [2.83 V⁄1m]: 91.5 dB
• Resonance frequency [fs]: 980 Hz
• Power [P]: 100 W (IEC 268-5)

Note: Tweeters are supplied matched pairwise (±0,5 dB in 2.5…17.5 kHz range), if ordered in pairs.

See also:

Bliesma T25A-6 - information in PDF format (229 Kb)

HiFiCompass - BlieSMa T25A-6, T25B-6, T25D-6, T25S-6

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