The most straightforward in terms of design is simply dubbed "The Ronin", it was the original and uses very high quality passive crossover components, including mills resistors, ClarityCap SA series capacitors, and 12 AWG copper foil inductors. 

The "Ronin A" is the active, or amplified version of the Ronin.  Everything remains the same, except the passive crossover for the woofer is removed, and in its place is a 500W amplifier to solely power the 10" woofer.  The result is an impedance curve that never dips below 6 ohms, and a much easier load on the amplifier.  During testing with lower powered amplifiers, 6dB more output was available during very dynamic musical selections, if these dynamics were mainly in the bass range, 8 to 10dB of additional headroom was available.  The woofer amplifier allows user control of the level, phase, parametric EQ, and subsonic filtering of the woofer.  This is implemented through a plate amplifier fit on the lower rear pannel of the enclosure

The "Ronin D" is the digital version of the Ronin.  It uses technology from DEQX to perform time and phase linear filtering before any amplification.  The result is the theoretically perfect point source, uniform power response loudspeaker.  It is not only produces perfect transients on axis, but off-axis as well due to the coincident driver alignment.  Proper tonal balance is ensured off axis as well with the waveguide loading of the tweeter and dipolar radiation pattern of the midrange.

All of the Ronin Models Share the below specifications.

 Dimensions: 42” Tall, 11.25” Wide, 14” Deep
Weight: 75lbs each
Construction: Biscuit Jointed Cross-Ply Bamboo Panels
Woofer Loading: Sealed Box, Q=.65
Woofer: 27cm Long Throw Aluminum Cone 0-250Hz, Copper Shorting Rings.
Midrange: 22cm magnesium cone 250-1350Hz, Copper Shorting Rings.
Tweeter: 28mm Silk Dome, Light Weight Fero-fluid, Neodymium Ring Motor.

Sensitivity: 87.5dB / W
Electrical Phase: -30 to +35 degrees across entire audio band
Frequency Response: +/- 1.25dB from 40 to 6.5Khz and +1.25 or +1.25,  -3dB from 36 to 24Khz.  Real bass response will reach into low 20's in typical listening rooms.

Impedance:

Ronin - 3.5 Ohms Minimum, 4 Ohms Nominal

Ronin A - 6.2 Ohms Minimum, 8 Ohms Nominal

Ronin D - Woofer - 3.8 Ohms Minimum (88dB), Midrange - 7.8 Ohms Minimum (89dB), Tweeter - 6 Ohms Minimum(91dB)

The Ronin

The Ronin D

This is a graph showing the overall power response of the speaker. Measurements were taken at 0-80 degrees off axis, with 10 degrees between each measurement.

The importance of this measurement can not be over-emphasized.  A plot like this will tell you more about how a speaker will sound than any on-axis plot.  Traditional speakers should have this type of measurement done in both the horizontal and vertical planes due to their non-coincident driver arrangements.  There is an excellent example of this in the Technical Articles section.  In fact, this is nearly perfect between 200 and 2.5Khz, you will not find this ANYWHERE else. Above and below, it is very good, exceeding most anything on the market today. Keep in mind that this is an unsmoothed, un-doctored completely real set of frequency response curves. Most manufacturers smooth their frequency response curve to look more benign.