TiFi Poseidon Spinorama measurement graphs. About Spinorama methodology read here.
On-Axis *
On-Axis Tolerance: +1.0 dB, -1.2 dB
Predicted In Room
Predicted In Room Tolerance: +1.3 dB, -1.6 dB
Listening Spot Graphs
Directivity
Horizontal Reflections **
Vertical Reflections
Comments
Totally symmetrical horizontally. All listening spot graphs in close range. Bass is taken down on purpose, otherwise TiFi Poseidon would be too bass heavy, but selectable from DSP are two bass heavier profiles, and one reduced bass profile.
Measurements
* On-Axis is measured in direction of average listening spot for 3 m distance at height of 1.2 m (that is vertically raising angle 7 degrees).
** Horizontal reflections are measured with half of raising angle of On-Axis measurement (that is vertically raising angle 3.5 degrees)
Spinorama is measured in a room one meter distance, with sound level normalized to 85 dB On-Axis, with a 4.8 ms gating window, which allows the direct sound of the speaker to be measured but reduces measurement resolution at lower frequencies.
Lower frequencies are measured on-axis, 2m away, in an open room using the Ground Plane method, with sound level normalized to 1m 85 dB for an open room.
The frequency response graphs are merged based on the average sound frequencies on the Spinorama axis and the Ground plane axis at 330 Hz, forming a unified graph. Spinorama angle graphs are replaced with a corrected graph below 330 Hz. Angle corrections are made using a diffraction model based on the dimensions of the speaker and loudspeaker, normalized to the actual Spinorama angle measurement result at 330 Hz.
After Spinorama calculations, the graphs are rounded to 1/12 dB.
The measurements should be considered preliminary. The small peaks and differences in the graphs +/- 2 dB are not reliable, but the overall shape of the graphs and the characteristics of the speakers are described accurately with the initial measurements.