TK-5C Measurements and Analysis
Impedance / Phase Measurements of the TK-5C
Rating these speakers 8 ohms is a bit conservative in my opinion as they look more like a 10 ohm speaker than 8 ohms as at their lowest impedance dip around 200Hz or so, they are still hovering above 8.5 ohms. They easily maintain +-30deg phase within the entire audio band making them a very easy load for virtually any amplifier to drive.
In Room ½ Meter Frequency Response of the TK-5C (1/12th octave smoothed)
I did a quick and dirty in room response measurement of the TK-5Cs at ½ meter. What I found was that the -3dB point as confirmed by the frequency response and saddle point on the impedance graph is around 60Hz just as the manufacturer claims. They maintain a linear response of +-3dB throughout the entire audio range but do tend to favor the lower midrange in the 1kHz to 3kHz region just like my listening tests confirmed. Many manufacturers at this price point tend to taper off the midrange response to hide a speaker systems weaknesses since this is a critical region in human hearing that is unforgiving to bad sound. In tradition with all RBH speakers I’ve reviewed in the past, they don’t hide anything. Instead, their speakers bring forth the midrange, which can at times sound a bit analytical, but on good recordings you will be rewarded with great dynamics and realism in the vocals and percussion.
