EMP EW30 Measurements and Analysis
Impedance / Phase Measurements of the EW30
I was surprised to see the system impedance dip to 3.5 ohms from 50-100Hz which in my opinion is more reason to bass manage these speakers to remove the strain from the amplifier and let the more capable subwoofer produce the bass. The EW30s exhibit a relatively benign phase response of well under +- 30 degrees throughout the entire audio band indicating some good thought was applied to ensure these speakers would consistently sound good no matter what amplifier they were being played on.
In Room ½ Meter
Frequency Response (1/12th octave smoothed)
Green – off wall, Brown
– on wall
Above
500Hz, these speakers are surprisingly very linear maintaining a +-3dB in room
frequency response. Below 500Hz there
seemed to be a slight tapering off of bass which may indicate why I felt they
lacked a bit of upper bass punch.
Placing them against the wall (their intended designed placement)
boosted the bass response significantly due to boundary gain as indicated in
the measurements below 150Hz. These speakers were designed to be placed against a wall and thus incidentally measure most linear and sound their best when placed as such.
