ScanSpeak D3004/602010



The D3004/602010 is a 4Ω tweeter from the ScanSpeak Illuminator series.

In a compact design, using a powerful neodymium motor with an under-hung voice coil configuration together with a large linear excursion capability the D3004/602010 share similar qualities with its larger Illuminator tweeter siblings.

Key features:

  • 1″ Textile Dome Diamphragm
  • Patented Symmetrical Drive (SD-2) motor
  • Large Non Resonant Alu Rear Chamber
  • Large Roll Surround f. Wide Dispersion
  • Sound Transparant Protective Grill
  • Die Cast Housing & Face Plate


ScanSpeak Spec sheet: D3004/602010

T/S Parameters:


Very good consistency between the two tweeter samples and they match very close to the manufacturer’s specification.








(click on picture to zoom)



(click on picture to zoom)

Sample 1 = Green
Sample 2 = Blue

Small impedance hump @ 1.5kHz. Slightly lower impedance peak at Fs for tweeter sample #1, otherwise virtually the same impedance between the samples.



Frequency measurement conditions:

The tweeter is measured mounted on a baffle with the following conditions:

Baffle size (WxH): 24×51cm with 12mm round-over.
Driver position: Mounted on center-line with driver unit center 7cm from the top of the baffle.
Mic position: 1m distance, on tweeter-axis.
Smoothing: 1/24 octave smoothing applied.

(click on picture to zoom)

Left: Frequency response on-axis (Blue=sample1, Red=sample2).
Right: Frequency response 15deg off-axis (Blue=sample1, Red=sample2).

The two tweeter samples measures virtually the same, which indicates good consistency in the manufacturing process.

Relatively smooth on-axis response between 2-6kHz with a slowly rising response from 6kHz up to about 14kHz where it drops. Measuring from 15deg off-axis the response is smoother with slowly dropping highs from 15kHz.


0deg = Blue
15deg = Red
22.5deg = Green


30deg = Blue
45deg = Red
60deg = Green



Measurement setup:

  • Tweeter near-field measurement at 10cm
  • Frequency Range Tweeter: 500-10000Hz
  • Baffle size WxH: 24×51cm

The distortion measurements are done in near-field and the amplifier output level was adjusted for each driver so that the fundamental is 85dB, 90dB and 95dB at 1m. This setting simulates normal to medium-high and high listening levels.

85dB @ 1m (click on picture to zoom)

Left = Sample 1

Right = Sample 2


90dB @ 1m (click on picture to zoom)

Left = Sample 1

Right = Sample 2


95dB @ 1m (click on picture to zoom)

Left = Sample 1

Right = Sample 2

Very low odd-order distortion even at higher levels and somewhat elevated second-order distortion, which rapidly raises below 2kHz.

This tweeter should be able to work nicely crossed-over at 2kHz or higher.