Up for test is a fairly new driver in SB Acoustics’ ‘Satori’ lineup: MW13P-4 5″ Mid(woofer/range). At the time of this posting (02/26/15) this driver can be purchased from Madisound for about $155/each. I’ve got a new install that calls for a 5″ midrange and I thought this would be worth a shot. So, let’s check it out.
Let’s start this out by looking at this work of art…
Small Signal Parameters
Results as measured via Dayton’s DATs measurement tool. Which is a very little handy tool to have. 😉
- f(s)= 48.45 Hz
- R(e)= 4.16 Ohms
- Z(max)= 38.69 Ohms
- Q(ms)= 3.475
- Q(es)= 0.419
- Q(ts)= 0.374
- V(as)= 12.410 liters (0.438 cubic feet)
- L(e)= 0.46 mH
- n(0)= 0.32 %
- SPL= 87.17 1W/1m
- M(ms)= 7.18 grams
- C(ms)= 1.50 mm/N
- BL= 4.66
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.
Maroon – Fundamental
Blue – THD
Red – 2nd Order Distortion
Pink – 3rd Order Distortion
Green – 4th order
Teal – 5th order
Testing done in the nearfield to emulate 90dB, 96dB, and finally 102dB output (in order):
Frequency Response: As you can see above, there is about a 5dB rise in response beginning at about 1.5khz extending through the rest of the response in conjunction with typical modal issues. It’s worth noting the ScanSpeak 15m exhibits the same rise, though, a bit earlier in frequency. You can see the spec sheet here. Additionally, ScanSpeak’s 15w exhibits very similar FR bump, as seen in the spec sheet here. Comparing these two, you can see there are actually a lot of similarities in the FR between the Scan 15w and this 5″ Satori. While the FR isn’t ruler flat, this rise occurs at a point where beaming has occurred and therefore most likely would be mitigated by a crossover point that allows a wider dispersion pattern to match up with a tweeter that is ‘omni’ directional at it’s low end.
The 8khz mode is about 10dB higher than the response at 2khz and shows up off-axis in each increment. This shouldn’t be a real issue if this driver is crossed over at/before the beaming point, but if you were to try to eek extra performance out of this (though, I don’t advise it), either need a notch filter or a very steep crossover slope should be used to avoid the audible sibilance and brightness caused by this modal issue.
Harmonic Distortion: The HD looks VERY good. Even at 102dB @ 1/2m equivalent the THD above 150hz is less than 0.30% for the most part which is still EXTREMELY low distortion for this high of SPL. The separation between 2nd and 3rd order distortion at this output has about a 15dB delta above 300hz which is very nice. Overall, some top-shelf distortion values.
Bottom line: Used as a midrange crossed above 200hz/LR2 and below 2khz/LR2 I’d say this is a stellar driver. If you wanted to cross lower, I’d say 150hz is feasible with a steeper crossover. You could get away with a lower crossover point but I personally prefer to go with larger drivers and cross high (relatively speaking) when I can. On the high end, I would say that the 2-3khz region would be the max I’d go for reasons mentioned before.
Subjectively I can say that I’ve been using these in my car for the past couple weeks and have been VERY impressed with them. I actually prefer them over the Scan 12m, and the Scan 15m/15w … but I’m basing these impressions on aural memory which isn’t great, so take that for what it’s worth.
As an aside… these things are just plain gorgeous!
For what it’s worth, Zaph tested the 6″ Satori some time ago and it had quite good results. This 5″ version emulates that.
Here is a link to download the 30 degree FRD and ZMA data.
PS: If you would like to help me keep up funds for testing, there’s a little ‘contribute’ button that goes through Paypal all the way at the bottom of every page. Any little bit helps.. heck, $3 buys me painter’s tape to help seal any small gaps in the baffle/blank interface. 😀