2-way standmount loudspeaker 6"+1"
Drivers: SB Acoustics Satori MW16P-4 a TW29RN-B-4Cabinets: net volume 18l for woofer, BRSensitivity: ~86dB/2.83V/1m Impedance: nominal 4Ω, minimal 3.3Ω at 200HzFrequency -3dB: 48Hz
This was a project for the client, former owner of small 2way from Xavian. Client suggested Satori drivers. I agreed as I haven't worked with Satori drivers yet, and all the reviews promised excellent results. Later I started Ghibli project, just for fun.
MW16P frequency response is very extended and it is very easy to realize acoustical LR2 slope. Though breakups are well dampened, I would not cross it over too high. LR2 at 2kHz seems good compromise. I consider MW16P one of the best for midwoofer duty in 2 way loudspeaker. It just provides the right mix of parameters and measurements. Very low distortion from bass to midrange, reasonable linear frequency response, goog bass extention in 18L BR enclosure, and good dispersion at 2kHz. The only flaw is resonance at ~1300Hz from cone-surround interaction, but after study of all 3rd party measurements and experiences I decided to neglect it. There is no solution for it anyway, so why to worry about it. Listening test does not confirm any problem with this resonance, and actually midrange is what I like the most with this driver.
I wanted to use LR2 filters for both bands and both drivers are suitable for this target. Front baffle tilting was required to achieve this.
I always intend to create gradually falling horizontal responses with flat power response. No typical narrow/wide/narrow polar response. This is not easy to achieve with 6"+1" concept without waveguide. There are inherent flaws in this concept, dispersions of both drivers at crossover frequencies are not matched. To mitigate this, midwoofer needs to have reasonable dispersion at crossover frequency, crossover frequency has to be as low as tweeter allowes, and shallower crossover slopes help to merge not matching dispersions of both drivers. Part of the solution is also in lowering of he response (creating shallow dip 1-2dB in axial response) above crossover frequency. There is usually diffraction of the tweeter in this region, so lowering of the response helps to keep declining trend of the power response.
For cabinet details refer to Ghibli project.
Measurement of finished loudspeakers
Final measurements must confirm the correctness of the assembly and the match of both loudspeakers. FRs measured from 1m, gating ~4ms applied, no smoothing, ref axis between tweeter and midwoofer.
Matt finish with figured wallnut veneer.