Test Seas Noferro 900 (H 1025-06)

Datasheet © www.heissmann-acoustics.de
Measurements in DIN baffle in 70cm distance at 2,83V. Level scaled to 1m

Seas Prestige Noferro 900 (H 1025-06)

27mm dome tweeter 6 ohm

Seas Prestige Noferro 900 (H 1025-06)

Seas Noferro 900 (H 1025-06) Sound pressure & impedance (dispersion)

Seas Noferro 900 (H 1025-06) Sound Pressure Impedance Scattering

Excellent linearity. Full level already from 1000 Hertz. The efficiency is above average with 92 / 2,83V for an 25mm dome with a nominal impedance of 6Ω.

The amplitude, impedance and impedance paths of the two drivers are almost congruent.

Seas Noferro 900 (H 1025-06) sound pressure at angles (15 °, 30 °, 45 °, 60 °)

Seas Noferro 900 (H 1025-06) Angle Measurements

Very clean and uniform bundling behavior.

Also in super high for a tweeter with 26mm voice coil very wide beam.

Seas Noferro 900 (H 1025-06) decay behavior

Seas Noferro 900 (H 1025-06) Swinging out

Overall, very smooth and rapid decaying over all frequencies. Minimally delayed by 16kHz.

Seas Noferro 900 (H 1025-06) harmonic distortion

Seas Noferro 900 (H 1025-06) harmonic distortion

Very low 3rd order distortion. Even at 95dB / 1m it always stays below 0,3%, and that from 1khz. K2 is strongly dependent on the excitation signal, rising below 3kHz. Recommended separation:> = 2kHz (18dB / octave) Overall very low distortion.


Frequency response / directional behavior:4.5 5 out of stars
Range:4 5 out of stars
Power handling:4 5 out of stars
Continuity of series / Without rating /:0 5 out of stars
Haptics:4 5 out of stars
Price-performance:5 5 out of stars


As a classic shows what he can.
In all disciplines, the Seas Noferro 900 shows very good readings.
Noteworthy are the ruler-smooth frequency response on the axis and the very clean omnidirectional behavior.
A really fine tweeter.
As already said the Klang & Ton (04/2000):

There is simply nothing wrong with this tweeter ...