ROTEL CD14 MKII / A14 MKII
[Polish]
https://audio.com.pl/testy/stereo/odtwarzacz-cd-wzmacniacz/3530-rotel-cd14-mkii-a14-mkii
to English:
https://audio-com-pl.translate.goog...l=auto&_x_tr_tl=en&_x_tr_hl=es&_x_tr_pto=wapp
Rotel A14 MKII laboratory
Rotel promises a lot, and provides ... even more, which is really surprising. After all, this is a class AB system, the housing is not large, so the company declaration of 80 W into 8 Ω and 150 W into 4 Ω seems risky optimistic.
And it turns out that we finish the measurements at 130 W and 224 W, respectively, and when both channels are simultaneously controlled -
2 x 126 W and 2 x 200 W [THD+N 1%]. Smooth.
In the first version of the A14 Rotel meticulously adhered to the "academic" sensitivity - 200 mV, in the A14 MKII he changed it to an experimentally modern value - 1.2 V. We will notice it in practice, the knob will have to be turned far, which should not be discouraged.
The
noise ratio is decent (83 dB), the dynamics has reached 104 dB. The study of the frequency characteristics (Fig. 1) was not a problem for the A14 MKII, the drop at 10 Hz is -0.7 dB (regardless of the load), and at 100 kHz only -0.3 dB at 8 Ω and -0.8 dB at 4 Ω.
None of the harmonics (Fig. 2) exceeds the ceiling of -90 dB, the second is the strongest (
-93 dB), and among the odd ones, the third (
-97 dB). Perfectly!
The Rotel can handle both 8- and 4-ohm loads, keeping the THD + N level low (Fig. 3). Below 0.1% we descend at a power of approx. 1 W.