Overview:
The R3004/602010 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 R3004/602010 share similar qualities with its larger Illuminator tweeter siblings.
The “R” version (R3004/602010) is essentially the same tweeter as the “D” version (D3004/602010) tweeter, but uses a ring dome diaphragm with an aluminium phase plug for increased frequency linearity.
Key features:
- 1″ Ring Dome Diaphragm
- Patented Symmetrical Drive (SD-2) motor
- Large Non Resonant Alu Rear Chamber
- Patented Phase Plug Design
- Sound Transparant Protective Grill
- Die Cast Housing & Face Plate
ScanSpeak Spec sheet: R3004/602010
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
A perfect match between the two tweeter 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.
Very smooth and linear frequency response. +/- 1dB between 2-20kHz.
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
Low odd-order distortion even at higher levels and elevated second-order distortion, which rapidly raises below 2.5kHz.
This tweeter should be able to work nicely crossed-over at 2-2.5kHz or higher.