Overview:
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)
Impedance:
(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:
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
Distortion:
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.