Heissmann Acoustics | WG

Test Scan-Speak Discovery H2606 / 920000 26mm dome tweeter 4 Ω with waveguide

Datasheet © heissmann-acoustics.de

Measurements in DIN baffle in 50cm distance at 2,83V. Level scaled to 1m.

Frequency response 2,83V / m & impedance

Even frequency response with smooth XCHARXRoll-OffXCHARX. Slight interference around 10kHz.

Due to the waveguide very high efficiency of 95,5dB / 2,83V / m.

By thin fluid ferrofluid slightly damped, very symmetrical resonce at 1,1kHz

Consisty

The 4 measured copies run, in the working area, nearly congruent, both in the amplitude, - and impedance response with a maximum deviation of + -0,35dB.

Directivity horizontal (0°, 15°, 30°, 45°, 60°)

Wide dispersion up to ~ 2,5kHz, then rapidly and evenly getting narrower towards the super highs.

Burst decay

Overall, very even and rapid burst-decay, minimally delayed in the super high.

harmonic distortion (90, 95 & 100dB / m)

Very low harmonic distortion, at all measured levels> 1,5 kHz

K3 barely exceeds, even at 100 dB / m, the 0,1% mark . K2 remains inaudible.

Rating

Frequency response / directional behavior:
Range:
Power handling:
Consisty:
Haptics:
Price-performance:

Conclusion

The Scan-Speak Discovery H2606 / 920000 is a fine tweeter, which, when used wisely, leaves practically nothing to be desired. Without hesitation, it can be used from 1,5kHz, even with high level requirements. Depending on the application possibly even deeper.

Due the somewhat special dispersion this tweeter asks for a mindfull connection to te midwoofer.

The H2606 is used in the kit Suzy-Q

Test Scan-Speak Discovery D2604 / 830000 with WG PCT-300 / WG-300 26mm dome tweeter 4 Ω with waveguide

Datasheet © www.heissmann-acoustics.de

Measurements in 20x40cm baffle, 10mm rounded, in 70cm distance at 2,83V. Level scaled to 1m.

The Waveguide was milled with a CNC adapter plate mounted on the tweeter.

Directivity horizontal (0°, 15°, 30°, 45°, 60° & 90°) & Impedance

... normalized to 0° (sonogram)

Due to the waveguide system-related symmetrical peak from 1-10kHz.
Extremely uniform directivity without significant disturbances. In the main very close to "Constant Directivity". The slight widening around 2,5kHz can be equalized by skillful choice of the midrange and its filtering.

Burst decay

Overall, very smooth and rapid decaying over all frequencies.

Minimal delayed in the super high tones.

harmonic distortions (90-105dB / m)

K3 remains, even at 105dB / m> 1kHz in the range

K2 rises evenly with increasing level and does not exceed the 1% mark by> 1kHz until levels> 100dB.

Outstanding!

Rating

Frequency response / directional behavior:
Range:
Power handling:
consisty / without rating:
Haptics:
Price-performance:

Conclusion

The Scan-Speak D2604 / 830000 measures itself at the Waveguide, apart from the ~ 1dB lower efficiency practically identical to the D2604 / 833000. Hence the same conclusion:

In terms of "dome tweeter with waveguide" remain, realistically, nothing to be desired. Very broadband usable, extremely low-level distortions and in terms of directivity close to the ideal ...

Test Scan-Speak Discovery D2604 / 833000 with WG PCT-300 / WG-300 26mm dome tweeter 4 Ω with waveguide

Datasheet © www.heissmann-acoustics.de

Measurements in 20x40cm baffle, 10mm rounded, in 70cm distance at 2,83V. Level scaled to 1m.

The Waveguide was milled with a CNC adapter plate mounted on the tweeter.

Directivity horizontal (0°, 15°, 30°, 45°, 60° & 90°) & Impedance

... normalized to 0° (sonogram)

Due to the waveguide, system-induced symmetrical peak from 1-10kHz.
Extremely uniform directivity without significant interference. In the main very close to "Constant Directivity". The slight widening around 2,5kHz can be equalized by skillful choice of the midrange and its filtering.

Burst decay

Overall, very smooth and rapid decaying over all frequencies.

Minimal delay in the super high frequency> 15kHz.

harmonic distortions (90-105dB / m)

K3 remains at <xnumx% at="" all="" measured="" levels,="" even="" xnumxdb="" m=""> 105kHz, and is largely independent of the excitation signal.</xnumx%>

K2 rising evenly with increasing level and exceeds the 1% mark appreciably only at levels> 100dB.

Outstanding!

Rating

Frequency response / directional behavior:
Range:
Power handling:
consisty / without rating:
Haptics:
Price-performance:

Conclusion

The reader may have noticed one or the other similarity to the Peerless DX25TG09-04 (Vifa XD-270 F/4) with Waveguide ...

The Scan-Speak is practically equivalent in all respects. It measures on axis a touch more restless, can play minimal louder, could probably be crossed slightly deeper, .
In terms of "dome tweeter with waveguide" remain, realistically, nothing to be desired. Very broadband usable, extremely low-level distortions and in terms of directivity close to the ideal ...

Test Peerless / Tymphany XT25TG-30 / 04 (XT-300 / K4) at the waveguide WG-300 / PCT-300 4 Ω ring emitter with waveguide

Datasheet © www.heissmann-acoustics.de

Measurements in 20x40cm baffle, 10mm rounded, in 70cm distance at 2,83V. Level scaled to 1m.

The Waveguide was milled with a CNC adapter plate mounted on the tweeter.

XT25TG-30 / 04 Sound pressure at angles

System-related exaggeration in the frequency band of 1-7 kHz. Due to its symmetry, this can be easily equalized with the crossover. It is the purpose of a sound guide to act as an acoustic amplifier. The Vifa XT-300 (XT25TG-30/04) is an excellent match for the waveguide. Extremely even bundling without any disturbances worth mentioning. Due to the large dome (30mm voice coil), a slightly stronger directivity from 8kHz. Recommendation: plan a slight increase> 8kHz in the high frequency on axis.

XT25TG-30 / 04 Sound pressure standardized at angles to 0 °

Here, the frequency response was linearized on axis. The 2. Picture (sonogram) clearly shows the excellent uniform straightening behavior of the combination of XT-300 and the waveguide.

XT25TG-30 / 04 decay behavior

Minimal delayed decay by 2kHz. Otherwise perfectly.

XT25TG-30 / 04 harmonic distortions

As expected, the distortion decreases compared to the variant without waveguide. The XT-300 already showed very good distortion even without waveguide, but with a significant increase of K2 under 3kHz. With Waveguide the effect is also present but attenuated by about 5dB. In sum, very low distortion. Even with 100dB, everything from 2kHz remains below 1%. K3 moves at the measurable limit.

Rating

Frequency response / directional behavior:
Range:
Power handling:
Constance / Without Rating /:
Haptics:
Price-performance:

Conclusion

The Peerless XT25TG-30/04 and the Waveguide WG-300 are a very attractive combination for extremely level-stable installations, for example in the home theater. Can be used from 1,5 kHz. I think I'll test it out in Cinetor.