No problem, I'll try my best.
Some of the frequently quoted specs are:
- THD+N (Total harmonic distortions plus noise) in % or dB (with the "-" sign, e.g. -90 dB), the lower number the better.
- DNR (signal to noise ratio), the higher the better, but pay attention to the "weighting" in order to compare apples to apples.
- IMD (inter modulation distortions), like THD, the lower the better.
According to the manual, the Rotel has the following audio specs:
Continuous Amplifier Power 20–20k Hz, <0.09% THD, 8 ohms: 75 watts/ch (all channels driven) 1kHz, <1.0% THD, 8 ohms, DIN: 100 watts/ch (all channels driven)
Total Harmonic Distortion: <0.09% at rated power
Intermodulation Distortion (60 Hz: 7 kHz): <0.09% at rated power
Frequency Response (line level): 10 Hz - 70 kHz, ± 3 dB
Signal to Noise Ratio (IHF “A” weighted): 92 dB (Stereo) 70 dB (Dolby Digital)
Now compare that to the your SR6014's:
110 W + 110 W (8 Ω/ohms, 20 Hz – 20 kHz with 0.08 % T.H.D.)
10 Hz – 100 kHz — +1, –3 dB (Direct mode)
Digital
D/A output: Rated output — 2 V (at 0 dB playback)
Total harmonic distortion — 0.008 % (1 kHz, at 0 dB)
S/N ratio — 102 dB
Dynamic range — 100 dB
So you can see that the Rotel does not have better audio specs, I would say comparable. I also compared the SR6014's bench measurements, and its measured THD+N did meet or exceed the specified numbers. In the Rotel's service manual, I thought they included some measurements but when I read it again, I realized they were left blanked, I mistaken the specs for measurements the first time I took a quick glance.
To understand the specs and numbers, below are some useful links:
For audio terminologies:
Audio Terms and Definitions | Audioholics
More detailed explanation of specs:
Easy to read ones:
5 Important Specifications To Consider When Choosing An Amplifier | Cambridge Audio
Audio Specifications (ranecommercial.com)
Mathew-AudioPrecisionSpecifications.pdf (sengpielaudio.com)
Guide: Understanding audio specifications and hardware | TechPowerUp Forums
For example, it explained THD+N this way:
Total Harmonic Distortion + Noise (THD+N): A measurement of the amount of unwanted impurities in a given signal. Whereas Total Harmonic Distortion measures unwanted signals in the output, THD+N measures everything that manages to interefere with the output signal, from EMI to harmonic irregularities.
Ideally, THD+N would be 0% at any tested level, meaning that the signal being sent into the system is identical to the one being played out of the system; but we live in an imperfect world where our audio equipment will pick up interference and noise and pass it along through the output signal. Be careful reading these specs as well, as an example it's very easy to mistake 0.013% for being better than 0.000013% (the latter is much smaller and closer to ideal 0% than the former is).
For more advanced readers:
Article: Understanding Digital Audio Measurements | Audio Science Review (ASR) Forum
Guidelines for Measuring Audio Power Amplifier Performance (Rev. A) (ti.com)
If you need any help in understanding any of the above linked articles, just ask and hopefully someone will have the answers for you.