Measurements taken in free-air with the driver unbaffled.
The rolloff you see in the low frequencies at 1/2m is due to the driver being tested without a baffle. The yellow curve is taken right up at the driver's cone, and is accurate in the low frequencies to about 500hz.
Spl looks to be about 88dbwm. No evidence here of cone breakup, just a nice smooth rolloff at ~4khz. The bump at 1.3khz is a measurement artifact... probably diffraction off the edge of the driver. All the little squiggles are reflections, and no smoothing was applied.
Nice smooth rolling response into the bass, should give pretty flat bass all the way down to 20hz in a well treated door.
Impedance curve, note the edge resonance at 800hz from the surround. Excellent quality control, t/s parameters are close to manufacturer specs.
Clean waterfall, with perhaps a slight problem at 10khz, which could be the room.
Average decay.
Some problems here, could be cone breakup.
All distortion plots taken at 96db @ 1m. This is actually fairly loud, and representative of real world listening levels.
Pretty good performance, below audible threshold.
Still decent. Note that higher order products are always lower than second order, which is good.
Not so good performance here. Coincidentally, this is the same area where the ripple shows up in the impedance curve.
Everything past here is below 1%.
Interesting curves. BL curve looks a bit funny, but gets you to 9mm 1 way xmax. LE curve is not so good, just a standard overhung driver without shorting rings. KMS is also not very good. Looks like rearward travel is restricted to prevent bottoming of the voice coil and spider.
Note that this driver was able to reach 24mm peak to peak before reaching protection limits, which is 25% of BL and 20% cms. Outstanding.
Pros:
1. Affordable, high output mid/bass w/ good efficiency
2. Nice low end response and smooth, extended top end
3. Quiet operation with low mechanical noise and good airflow around
the driver
Negatives:
1. Distortion could be better
2. Could have better decay times
I really like this driver. It has a pleasing sound that's a tad on the warm side and is very well built for the money. Bass output is phenomenal, and the driver does not complain all that badly when overdriven. For a home project I might look elsewhere, but for car audio it's a sure winner.
The rolloff you see in the low frequencies at 1/2m is due to the driver being tested without a baffle. The yellow curve is taken right up at the driver's cone, and is accurate in the low frequencies to about 500hz.
Spl looks to be about 88dbwm. No evidence here of cone breakup, just a nice smooth rolloff at ~4khz. The bump at 1.3khz is a measurement artifact... probably diffraction off the edge of the driver. All the little squiggles are reflections, and no smoothing was applied.
Nice smooth rolling response into the bass, should give pretty flat bass all the way down to 20hz in a well treated door.
Impedance curve, note the edge resonance at 800hz from the surround. Excellent quality control, t/s parameters are close to manufacturer specs.
Clean waterfall, with perhaps a slight problem at 10khz, which could be the room.
Average decay.
Some problems here, could be cone breakup.
All distortion plots taken at 96db @ 1m. This is actually fairly loud, and representative of real world listening levels.
Pretty good performance, below audible threshold.
Still decent. Note that higher order products are always lower than second order, which is good.
Not so good performance here. Coincidentally, this is the same area where the ripple shows up in the impedance curve.
Everything past here is below 1%.
Interesting curves. BL curve looks a bit funny, but gets you to 9mm 1 way xmax. LE curve is not so good, just a standard overhung driver without shorting rings. KMS is also not very good. Looks like rearward travel is restricted to prevent bottoming of the voice coil and spider.
Note that this driver was able to reach 24mm peak to peak before reaching protection limits, which is 25% of BL and 20% cms. Outstanding.
Pros:
1. Affordable, high output mid/bass w/ good efficiency
2. Nice low end response and smooth, extended top end
3. Quiet operation with low mechanical noise and good airflow around
the driver
Negatives:
1. Distortion could be better
2. Could have better decay times
I really like this driver. It has a pleasing sound that's a tad on the warm side and is very well built for the money. Bass output is phenomenal, and the driver does not complain all that badly when overdriven. For a home project I might look elsewhere, but for car audio it's a sure winner.