LABORATORY TEST REPORT
Newport Test Labs measured the output voltage of the Marantz SA-KI Ruby as 1.9753-volts, for both the left and right channels… which means that the balance between the channels was absolutely perfect. I’d like to emphasise this, because it’s the first time I’ve ever seen this result from any type of component… there’s usually always a small difference, even if it’s in the order of 0.0001dB. But the Marantz SA-KI Ruby? Perfect!
Separation between the channels was outstandingly good at low and midrange frequencies, with measuring it as 118dB at 20Hz and 114dB at 1kHz. The Marantz SA-KI’s a result of 91dB at 20kHz is extremely good, and is far more than will ever be required at this frequency. Interchannel phase errors were also extremely low, just
