Test Scan-Speak Discovery D2604 / 833000 26mm dome tweeter 4 Ω

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

Scan-Speak Discovery D2604 / 833000

Frequency response and impedance (consisty)

Scan-Speak D2604 / 833000 frequency response

Extremely broadband frequency response. Full level from 1,1kHz, with good linearity.

The average efficiency is exceptionally at 93dB / 2,83V.

Impedance is flawless. The resonant frequency with 430 respectively 440Hz is below the manufacturer's specification of 475Hz.

Both drivers behave almost congruently both in amplitude and impedance.

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

Scan-Speak Discovery D2604 / 833000 directivity

Directivity of the Scan-Speak D2604 / 833000 is even and balanced throughout the entire transmission range.

In the top octaves> 10kHz significantly wider radiating than, due to the effective membrane area of ​​8cm², would be expected.

Burst decay

Scan-Speak Discovery D2604 / 833000 burst decay

Overall smooth and fast decay over all frequencies.

> 10kHz minimal delay.

harmonic distortions

Scan-Speak Discovery D2604 / 833000 distortions

The Scan-Speak D2604 / 833000 has outstanding low harmonic distortions.

K3 remains below 1% at all measured levels> 0,5kHz largely independent of the excitation signal.

K2 increases with the level, extends very evenly and would not reach the 1% to 1dB / m even with a crossover-point at 100kHz!


Frequency response / directional behavior:4.5 5 out of stars
Range:5 5 out of stars
Power handling:4.7 5 out of stars
consisty / without rating:0 5 out of stars
Haptics:4.5 5 out of stars
Price-performance:4.7 5 out of stars


With an effective membrane area of ​​8cm², a resonant frequency <xnumxhz and="" the="" very="" low="" harmonic="" distortions,="" driver="" invites="" to="" be="" deeply="" crossed="" eg.="" a="" xnumxer="" mid-woofer.="" crossover="" frequencies=""> = 500kHz should be possible without any problems. In smaller systems, eg with a 20er TMT, the Scan-Speak D1,5 / 13 could be crossed even at lower frequencies.</xnumxhz>

The concept of a large effective membrane area, in combination with a "standard voice coil" (26mm), and a rather soft dome material works out. Widely radiating in te top octaves, crossable very low, with high load capacity.

=> Scan-Speak D2604 / 833000 with waveguide


7 thoughts too "Test Scan-Speak Discovery D2604 / 833000 26mm dome tweeter 4 Ω"

  1. Hello, is this tweeter still available?
    I have the Magnat Vintage 620 and a tweeter has burned out.
    Would this tweeter fit?

    With best regards, Mike Koertgen

    1. How the time flies. The Magnat makes 90 dB, ie the scan is 2 dB too loud. A voltage divider then has to go into the switch, but that is a wretched circus without measuring equipment. Since the separation is here at 3,5 kHz, the change is only in the upper MH range.
      Since both HTs have to be exchanged anyway, the hearing test can help heal for a new one.
      Belated greeting uz

  2. I have the 83000 running with the simple magnet in the kef 104/2, very wonderful. Of course you have to know the data situation, both make 92 dB, then it'll fit. The dead 33 from kef starts a little later, it could sound a little brighter, that's only good for the dark tuning of the kef, and a linear frequency response is not everything. Kef promises 1,5 dB over everything, and on the base the rest is a matter of taste.
    Greetings, uz

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