Mid-Fi[/b]
Digital source with min. resolution of 16bit/44.1kHz.
Amplification <0.1% THD 20Hz-20kHz, both channels driven.
Speakers with 80-90dB SPL (1m) at 3-5% THD, FR 50Hz-20kHz at -/+3dB.
Hi-Fi
Digital source with min. resolution of 16bit/44.1kHz.
Amplification <0.1% THD 20Hz-20kHz, both channels driven.
Speakers with 90-100dB SPL (1m) at 1-3% THD, FR 27Hz-20kHz at -/+2dB.
Hi-End
Digital source with min. resolution of 16bit/44.1kHz.
Amplification <0.1% THD 20Hz-20kHz, both channels driven.
Speakers with above 100dB SPL (1m) at no more than 1% THD, FR 20Hz-20kHz at -/+1dB.
As PP said "hifi" can mean "stereo", "system", "music gear" etc. In the correct meaning of High Fidelity, my system is not High Fidelity.
Yes indeed amplification is a bit rough estimate there, arbitrary figures. Lets forget about amplifier watts. If you can achieve Speakers performing above 100dB SPL (1m) at no more than 1% THD, FR 20Hz-20kHz at -/+1dB, with amplifier of 10Wpc in 8 ohms <0.1% THD 20Hz-20kHz, both channels driven, no problem there, it is still High End.