TiFi Elf Spinorama measurement graphs. About Spinorama methodology read here.
On-Axis*
On-Axis Tolerance: +1.8 dB, -1.8 dB
Predicted In Room
Predicted In Room Tolerance: +2.5 dB, -3.1 dB
Listening Spot Graphs
Directivity
Horizontal Reflections *
Vertical Reflections
Comments
Accordingly to price range On-Axis and Listening Window graphs are straight with minimal fluctuations. TiFi Elf characteristic spatial sound is emphasized from 2 - 5 kHz wide directivity profile. From DSP there are two bass heavier profiles, and one reduced bass profile selectable.
Measurements
* On-Axis and Horizontal Reflections are measured in direction of average listening spot for 2.5 m distance at height of 1.2 m (that is vertically raising angle 6 degrees).
Spinorama is measured in a room one meter distance, with sound level normalized to 85 dB On-Axis, with a 5 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 200 Hz, forming a unified graph. Spinorama angle graphs are replaced with a corrected graph below 200 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 200 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..