Up for test is Scan’s newer edition to their 10F lineage: The 10F/8414G10. This features a smaller neo magnet than it’s predecessors, making it an easier fit for tighter install applications. I tested one of those models a couple years ago, and the data can be viewed here.
Small Signal Parameters
Results as measured via Dayton’s DATs measurement tool. Which is a very little handy tool to have. 😉
- f(s)= 133.20 Hz
- R(e)= 5.73 Ohms
- Z(max)= 18.36 Ohms
- Q(ms)= 2.251
- Q(es)= 1.022
- Q(ts)= 0.703
- V(as)= 1.219 liters (0.043 cubic feet)
- L(e)= 0.55 mH
- n(0)= 0.27 %
- SPL= 86.39 1W/1m
- M(ms)= 2.17 grams
- C(ms)= 0.66 mm/N
- BL= 3.19
Frequency Response and the following Harmonic Distortion measurements were taken using Dayton’s OmniMic measurement system.
The frequency response measurements below are on-axis (0 degrees) and off-axis (15, 30, 60 degrees), measured at 2.83v/1m.
The following HD graphs are done in the nearfield, emulating 90dB at 1 meter as well as 96dB at 1 meter, respectively.
Frequency Response: This is pretty much cream of the crop stuff here. Average sensitivity is approximately 85dB @ 2.83v/1m. While not dead flat across the board, there is a high-shelf like boost above 2khz by about 3dB. The response also trends upward on-axis. At 30 degrees off-axis, this driver is practically flat out to 10khz. The polar response (off-axis response relative to on-axis) is stellar. Each axis of measure follows the same trend above the beaming point (which is determined by the diameter of the drive unit; in this case approximately 2khz) which is a sign of a very well damped cone exhibiting no modal issues to speak of until nearly 15khz. This excellent polar response means a couple things: a) if you wanted to use this above the beaming point there will be no significant modal ringing or specifically harsh areas in the sound or b) if you plan to cross this to mate with a tweeter, keeping directivity at the crossover low this driver will not need a lot of ‘work’ at the crossover because outside of the typical crossover point I’d expect one to use here there are no aberrations in the response; just a general upward tilt to the response.
Harmonic Distortion: The first thing worth noting is the 400hz high-Q peak in distortion. At 96dB and 102dB equivalent output, this peaks to about 2-3% THD. This is a resonance of some sort (possibly basket) evidenced by the fact the small blip in impedance lines up with this frequency. Worth noting is this same peak in distortion appears in the my testing of the earlier 10f/4424g00 here. Outside of that, the 3% THD limit is met on the low end at approximately 115hz. The 1% THD line is above 300hz. Above 600hz, distortion falls to under 0.50% THD throughout the rest of the frequency range. Given the Fs of this drive unit and the THD, a realistic crossover range is in the 300-500hz region, depending on output levels and steepness of the crossover slope.
Comparing against the earlier 10f/4424g00 tested here: While FR looks very similar, THD is one area where this particular drive unit differs from the 10f/4424g00. Comparing the THD of the two, you’ll see the distortion of the 10f/4424g00 unit increases above 1% to approximately 1.5% THD above about 1500hz where 2nd order distortion with that unit rose nearly 20dB. The unit under test here keeps it’s low 2nd order distortion and is approximately 1% lower above 1500hz in comparison.
Test setup note: The driver cutout was chamfered. The driver was not flush-mounted; it was surface mounted.
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