Hello, I am interested in this receiver in a stand alone setup streaming TV and music playback in a variety of ways from stereo to across my 7.1 setup.
Cutting through the chase my questions are about the unit heat and performance without external amplifiers? Will it be good to rock
My 4 ohm & 6 ohm Speakers? I don't continuously blast but will turn up the fun parts and rewind to catch them again with more volume.
This sort of questions keep popping up, it is a good example of the effects of exaggerated talks from print magazines and of course the internet in recent years.
The fact is, impedance is just one factor, to answer your question you have to consider at least the following:
- Distance, speaker sensitivity,
- Impedance curve, 4 ohm, 6 ohm etc., are just single values on the frequency axis, it is better to obtain the impedance vs frequency curve.
- Phase angle, to address your concern about heat dissipation in your receiver, or even external power amp, phase angle vs frequency could also be a factor.
- Most importantly, how "loud" you listen is an important factor.
Numerical examples in support of he above:
- The sound pressure level at your listening position is related to distance, example: a speaker that produces 90 dB at 1 meter, will produce 84 dB at 2 meters, 78 dB at 4 meters.
- A speaker that has impedance averaging 6 ohms in the range 20-200 Hz may be more "difficult to drive" than a speaker that has a couple of 3 to 4 ohms dip in the 20-60 Hz but above 8 ohms everywhere else on the frequency axis.
- An so called 8 ohm nominal speaker that has nominal impedance >35 degrees, or much higher in the 20-300 Hz (just an example) could cause the amplifiers/receivers to heat up more than 4 ohm nominal speaker that has phase angle below 20 degrees in the same frequency range.
- To perceive (probably not all but most people) twice as loud, you
may need about 6 to 10 dB more "power", that means if you enjoy listening at say 80 dB average level, with peaks to 100 dB, you will need 10 times more power than someone who enjoys 70 dB average, 90 dB peak. That also means 4 ohms speakers may not be a concern for someone who sits say only 3 meters from their speakers and they enjoy 70 dB average, and could not even tolerate 80 dB average for any more than a few second, but it could be a real concern for someone who frequently listen to 80 dB average on material that have 100 dB peak or higher.
You can ignore all of the above if you just size your receiver or amp to allow for the worse case, for example, if the speaker spec says recommended 20-100 W, you get them an amp, or receiver conservatively rated 120 W to 150 W 8 ohms, or external amps rated 200 W/300 W 8/4 ohms (better, obviously).
My point in my long post is simply that it is not a Yes/No answer to your simple question.