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Specifications:

Size: 15cm x 25cm x 20cm WHD
Frequency Range: 48Hz-20KHz (+/- 1.5dB 100Hz-10KHz)
Recommended Amplifier: >40watts
Sensitivity: 83dB
Impendence: 8 Ohm average (6 Ohm minimum)
Crossover: 2.2KHz, Phase Aligned 4th order
Bass Alignment: EBS, Aperiodic Front Slot Port
Distortion: ~0.2%

On objective audio:
Audio is almost unique in that it straddles the great divide between science and art.
"Directly or indirectly, all questions connected with this subject must come for decision to the ear, and from it there can be no appeal. But we are not therefore to infer that all acoustical investigations are conducted with the unassisted ear. When once we have discovered the physical phenomena which constitute the foundation of sound, our explorations are in great measure transferred to another field laying within the domain of the principals of mechanics. Important laws are in this way arrived at, to which the sensations of the ear cannot but conform." (Lord Rayleigh)

We are proud to present a comprehensive portfolio of the Kensai's measured performance:



Frequency Response
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This measurement was taken freestanding in semi-anechoic conditions at 50cm on the tweeter axis. When the Kensai is placed against a wall, the additional boundary will gently boost the response below the baffle step point, producing a very smooth response over the whole range.

 

 

Harmonic Distortion - This measurement was taken freestanding in semi-anechoic conditions. The level was set to 90dBSPL at a distance of 1m.

 

 

Impedance Curve - This is the Kensai's impedance response, showing a nominal 6 Ohms. The first two peaks, left to right, are the port cut-off frequency and the woofer resonance. The dip between these two peaks is the overall system resonance at 45Hz. The next peak is the asymetric crossover point at 2.2KHz. Series resistance in the low-pass filter is <0.1 Ohm, allowing excellent damping factor.

 

 

Phase Alignment - This shows the phase slopes of the woofer and tweeter. It can be seen that the phase is perfectly aligned at 2.2KHz as a result of the asymmetric crossover. This is one of many reasons the Kensai crossover is acoustically 'invisible'.

 

 

Directivity - This shows the Kensai's off-axis horizontal directivity, non-normalized. Measured freestanding in semi-anechoic conditions at 50cm.

 

 

Cumulative Spectral Decay - This shows the Kensai's decay behaviour. Measured freestanding in semi-anechoic conditions. Note the lack of resonance issues that lesser systems with metal cone drivers can exhibit.

 

 

Cabinet Decay - This shows the decay of energy in the Kensai cabinet structure. Measured with a contact microphone attached to the left side panel. Longest decay mode is ~45ms at 280Hz.

 

 

Step Response - This shows the Kensai's driver polarity and time domain behaviour. Measured freestanding in semi-anechoic conditions. It can be seen that both drivers are connected with positive polarity, and the acoustic offset between both drivers is very small. This depicts almost ideal behaviour for a Linkwitz Riley 4th order crossover.