The Amplifiers
At 1
kHz, THD was less than 0.04%, close to the specifications.
IMD,
using 1 kHz and 1.5 kHz sine waves, was a very low 0.005%
5
kHz and 6 kHz sine wave signals also resulted in low IMD.
At
10 kHz, THD was a bit higher, but still close to spec.
IMD
from 10 kHz and 11 kHz sine wave signals was, again, low, at less than
0.003%.
The
measured frequency response of the iPower 750 was 20 Hz - 20 kHz
± 0.25 dB.
The
frequency response for the crossover amplifier is shown below. It is
designed specifically for the woofers in the Kaya, and rolls off rapidly.
Conclusions
Innersound has outdone themselves with the Kaya, Kachina, and Tehya hybrid
speakers, as well as the iPower amplifiers. The sound is about as good as it gets.
Clarity, detail, accuracy - these are all terms that can be applied here.
I
can't think of a single negative with this package except for the cost, but
that is the same for any great product.
- John E. Johnson, Jr. -