Heissmann Acoustics | Scan-Speak

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:

Summary

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:

Summary

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:

Summary

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 Scan-Speak D3004-660000 Illuminator

Datasheet © www.heissmann-acoustics.de

Measurements in DIN baffle in 70cm distance at 2,83V. Level scaled to 1m

Scan-Speak D3004 / 660000 Illuminator

4 Ohm dome tweeter with neodymium drive (Air-Circ magnet system)

Scan-Speak D3004 / 660000 Illuminator Sound pressure at angles (0-60 ° in 15 ° steps)

The amplitude response of the Scan-Speak D3004 / 660000 Illuminator is extremely broadband. Full level already from 600 Hertz.

From 600Hz - 30kHz + -1,5dB linear with a broadband increase (+ 2dB) of 1,5kHz - 6kHz. The average efficiency is 92dB / 2,83V.

The omnidirectional behavior can be described as very good. Below 30 °, 20kHz is reached with practically full level. The resonance frequency is extremely low at 470Hz and gives hope for a very deep separability to the TMT / MT. The impedance response shows a minimal disturbance of around 1,5 kHz, which is also reflected in the amplitude response by a "level" that is considered harmless.

Scan-Speak D3004 / 660000 Illuminator Decay behavior

Fast and steady decay over all frequencies. A touch of delay indicates 19kHz.

Scan-Speak D3004 / 660000 Illuminator Harmonic Distortions

Scanspeak_D3004_660000_Klirr — gray line: 1%
Graph switches every 3 seconds

The Scan-Speak D3004 / 660000 illuminator has extremely low harmonic distortion.

At all measured levels, K3 remains below 500% from 0,3 Hz and <1% from 0,1 kHz and is largely independent of the excitation signal.

K2 increases evenly with the level, and runs at a very low level.

Clinker components of higher order are negligible.

Rating

Frequency response / directional behavior:
Range:
Power handling:
Continuity of series / Without rating /:
Haptics:
Price-performance:

Summary

The Scan-Speak D3004 / 660000 Illuminator is, in the sum of its properties, an excellent tweeter. Very broadband use, extremely low distortion and with very good omnidirectional behavior.

There was a considerable design effort to create an extraordinary tweeter. The Air-Circ Magnet System (6 Circular Neodymium Magnets) seems to work very effectively.

Only the not absolutely linear amplitude response on the axis clouds the otherwise impeccable impression minimal. By skillful wiring and / or selection of the baffle can still achieve a virtually perfectly linear frequency response.

Also noteworthy is the noble-looking exterior of the tweeter. The aluminum front panel and the seemingly futuristic magnet system make your heart beat faster, and in the sense of psychoacoustics, the driver will probably (even) sound even better ())

In order to do justice to the called price of RRP 180 €, features are required that set the driver apart from others. In my opinion, these are definitely given with the Scan-Speak D3004 / 660000 Illuminator and the driver is probably his Price-worthy!