- Written by Jim Clements
- Published on 19 May 2014
The JL Audio E-Sub E112 Powered Subwoofer On The Bench
All the below measurements are in-room response. The distortion measurements are performed on-axis in the near field to mitigate any room boundary effects. The frequency response tests are performed at 1-meter on-axis.
At 80Hz and 120dB, the distortion (THD+N) was 1.60%.
Tested at 50Hz, the distortion dropped and measured only 0.76%.
The 31.5Hz plot showed more pronounced harmonics, but the measured THD+N was still well below the threshold of audibility at 3.57%.
Tested at 20 Hz, the e112 sub hit the level of audible distortion (10%) at 113 dB.
This is the same test, but the test tone was at 16 Hz. This brought about audible distortion at 103 dB. This is an excellent result for a small subwoofer.
The plot above is the standard in-room frequency response test. This result shows the pronounced boundary and room-induced modal effects of the unequalized e112 subwoofer.