Surround Sound Speaker Systems

Kef IQ Series Speakers and HTBSE-W Wireless Subwoofer

On The Bench

HTB2SE-W

All measurements were taken in the middle of the listening room, to avoid interaction with corners or walls. Except as noted below, measurements were taken from 1 foot at a height equal to the center of the driver.

Even though KEF listed the usable frequency response of the HTB2SE-W at 30 Hz, I measured only 3.65% distortion with a 20 Hz sine wave at 100 dB.

At 31.5 Hz (third-octave), maximum output was over 112 decibels!

THD+N vs. frequency. Distortion is below 4% from 20Hz through the entire frequency range, other than a spike from around 60 to 68 Hz.

Frequency response at 1 foot (white), 1 meter (red) and two meters (blue).

The iQ 90, at 50 Hz, produces an amazingly low 0.14% THD+N.

At 1hHz, distortion is 0.486%.

And at 10kHz, 0.483% THD+N.

White noise at one foot, one meter, and two meters (in-room response)

Home Theater Systems

HTiB