Comparison Rotel RA-12 vs Rotel RA-11

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	Rotel RA-12	Rotel RA-11
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Device type	integrated amplifier	integrated amplifier
Element base	transistor	transistor
Amplifier parameters
Number of channels	2	2
Frequency range	10 – 100000 Hz /+/- 1 дБ/	10 – 100000 Hz /+/- 1 дБ/
Power per channel (8Ω)	60 W	40 W
Signal to noise ratio	100 dB	100 dB
Signal to noise ratio (Phono MM/MC)	80 dB	80 dB
Damping factor	180	180
Harmonic distortion	0.03 %	0.03 %
Channel sensitivity / impedance
Line input	150 mV 24 kOhm	150 mV 24 kOhm
Phono MM/MC	2.5 mV 47 kOhm	2.5 mV 47 kOhm
Preout	1200 mV 470 kOhm	1200 mV 470 kOhm
Connectors
Inputs	Phono USB B /to update/ coaxial S/P-DIF /2/ optical /2/	Phono USB B /to update/ coaxial S/P-DIF /2/ optical /2/
RCA	4 pairs	4 pairs
Outputs	Pre-Amp	Pre-Amp
For acoustics	4 шт	4 шт
Trigger output	2 шт	2 шт
On headphones	3.5 mm (mini-Jack)	3.5 mm (mini-Jack)
Front panel	display audio input jack /USB/ headphone output	display audio input jack /USB USB for audio streaming in AAC (m4a), WAV, MP3, WMA/ headphone output
Features
Adjustments	bass control /+/- 4 дБ on the 100 Hz/ treble adjustment /+/- 4 дБ on the 10 кГц/ balance adjustment level adjustment	bass control /+/- 4 дБ on the 100 Hz/ treble adjustment /+/- 4 дБ on the 10 кГц/ balance adjustment level adjustment
More features	By-pass/Direct ММ phono stage additional speaker connect Bi-Wiring external devices control	By-pass/Direct ММ phono stage additional speaker connect Bi-Wiring external devices control
General
Remote control
PSU	internal	internal
Power consumption	300 W	220 W
Standby consumption	0.5 W	0.5 W
Dimensions (WxDxH)	430x342x92 mm	430x342x72 mm
Weight	8.02 kg	6.39 kg
Color
Added to E-Catalog	april 2014	april 2014

Power per channel (8Ω)

The nominal sound power output by the amplifier per channel when operating with a load having a dynamic resistance (impedance) of 8 ohms. In our catalog, this parameter is indicated for the mode when all channels of the amplifier work under load (see "Number of channels"); in the presence of unused channels, the rated power may be slightly higher, but this mode cannot be called standard.

Rated power can be simply described as the highest output signal power at which the amplifier is able to work stably for a long time (at least an hour) without negative consequences. These are average figures, because in fact, the audio signal is by definition unstable, and individual level jumps can significantly exceed the rated power. However, it is she who is the main basis for assessing the overall loudness of the sound.

This indicator also determines which speakers can be connected to the amplifier: their rated power should not be lower than that of the amplifier.

According to the laws of electrodynamics, with different dynamic load resistance, the output power of the amplifier will also be different. In modern speakers, the standard values \u200b\u200bare 8, 6, 4 and 2 Ohms, and power levels are indicated for them.

Power consumption

The power consumed by the amplifier during normal operation. Some manufacturers may indicate average power values, some — indicators at maximum load. However, anyway, this parameter allows you to quite adequately assess the power consumption of the device and the requirements for connected power.

In addition, it can be useful if you have doubts about the accuracy of the claimed data on the output power (see "Power per channel (8Ω)"). The basic rule is that the total power rating of all channels cannot exceed the total power consumption of the amplifier. In addition, there are special formulas that allow you to derive the maximum possible rated power depending on the power supply and type of amplifier; they can be found in special sources.