Measured performance of EA-140 loudspeaker
- Don't take only our word for high performance of EA-140 --- we invited 3rd party to measure the performance of our EA-140 speaker to make sure you'll have unbiased performance results. Here comes the frequency response measured in anechoic chamber by Helsinki University of Technology (HUT).
How to interprete the results
- The ideal bass response in anechoic chamber is on lower level than other part of the response. That is due to the fact that the speaker is hanging in the air when it is tested in an anechoic chamber. The speaker radiates to 360 degrees space angle the bass frequency area. Locating the speaker on the floor will limit the space angle to 180 degrees which will result a boost of bass range. The relative level of bass response of EA-140 is near that of an ideal speaker.
- Treble is exactly in balance with other part of response and extends beyond hearing range.
- Only area where you could point a blaming finger is the area around 3 KHz which is about 2..3 dB on the low side compared to surrounding areas. We are working to analyze and fix that minor flaw in response. Please notice however that the current response without any further fine tuning is enough to position EA-140 to the highest class of speakers and clearly leaves behind large bunch of other speakers --- no matter what's the price.
- The performance to 20 degrees and 60 degrees off axis looks good. The roll-off of high frequencies is a natural feature of all dome tweeters.
- All the measurements were done at the distance of 2.5 meters from the speaker except for the bass response below 150 Hz was measured at the distance of 0.8 meters.
*** Update Feb 10, 2000: The 3 dB valley around 3 KHz is no more there. The fix is done to all shipping EA-140 speakers.