“Is there a way to manually set the impedance, on the STR-DN1080?? I would rather set the impedance to match my speakers, but I can't seem to find a way to do this. Also, it seems like all of my sound is just coming of front speakers. Any advice??”
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The 6 0hm figure that Sony uses is just their way of getting around the U.S. requirements for stating output power. The receiver should be able to handle speakers from 4 to 16 ohms, if you just remember that as the nominal impedance of a speaker rises, there will be less current available to drive it. 4 ohm speakers will take more current (hence, somewhat louder for the same volume setting, and easier to drive the amp too hard), but it's unlikely that you'll have any problems unless you drive them way too hard. Remember also that the stated impedance of a speaker varies wildly with frequency, but the amp never spends too long on a single frequency in the very low impedance range. I would avoid highly capacitive loads like electrostats (e.g., Martin-Logan) with this receiver and any speaker known to drop below 4 ohms for a significant part of the frequency range (fairly rare birds). Sony's using the 6 ohm figure with only one channel driven to state their power output suggests that they did not go out of their way to produce a robust and stable power supply, but so far, I've been quite satisfied with the sound I'm getting using the front and rear surround/height outputs to biamp my tower speakers in front, and using the remaining outputs for the rear channels (explained pretty clearly in the manual). If you're electronically paranoid, avoid 4-0hm speakers or buffer them with a 2-0hm, 50 watt resistor in series with the + terminal on each speaker. (A 4-ohm resistor would effectively suck up half the amp's power, so you would probably get 35-40 watts per channel, rather than the 75 watts it normally produces for a speaker with all speakers driven; this would mean a 3dB drop in output, or a just noticeable difference (JND) in perceived volume. Most of the time, you're probably listening at 1 to 2 watts output, anyhow. This Sony has a very good Protection circuit, so it will shut off quickly if it's unhappy with the speaker's impedance. If you're only getting sound from the front speakers, check all connections carefully, then recalibrate the receiver with its calibration microphone and choose the setting that gives you a balanced surround. You may have to play with recalibration for a while, and the menu is very informative as to how well you are doing. It will tell you, graphically, what you have done.
Sorry, there was a problem. Please try again later.I don't know how to manually set the impedance; however, the Receiver does have an automatic setup using the supplied calibration microphone. Using the Remote, select HOME. Scroll to the right, select Setup. (Note: The Receiver will assume you have a 2.0 Speaker Configuration unless you select something different.) Select Speaker Settings, Scroll down to Speaker Pattern. Select your Speaker Pattern, for example 7.1. Go Back to the Setup menu. Select Easy Setup and follow the onscreen instructions. (This worked perfect for me. With 7.1 material coming through the speakers I'm in 7th heaven.) (Note: I have my TCL TV ACR HDMI output hooked directly to the Receiver ACR input using a high quality HDMI cable. My Sony 4K/Blu-Ray player is also connected directly to the Receiver. This way all the 4K devices interface correctly with each other. I purchased everything listed here at Best Buy at the same time.) You could probably set your speaker impedance manually via the Setup menu, but that's above my head. You can't hurt anything by experimenting with the settings. Hope this helps. Good luck & good listening.
Sorry, there was a problem. Please try again later.The impendence is controlled simply by the speakers,if you have 4 ohm speakers you have 4 ohm impedance,if you have 16 ohm speakers you have 16 ohm impedance,the reciever will simply always be the impedance of the speakers your using,,the lower the impedance the more wattage but this will drive the reciever harder,just parallel the speakers down to 1 ohm and see how long it takes to see smoke,for cool reliable running I suggest 6-8 ohms and good sound,4 ohms will get more wattage but heat the reciever and shorten the lifespan so just stay at 6 ohms and turn the volume up more , that's basically the same difference. As far as no sound from rear speakers check mode and connection,the reciever will come 2.1 mode so maybe all you need to do is make sure it's set to the correct ratio of speakers you have hooked up , if none of this works you may have to contact Sony but just check ALL your settings first
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