4 ohm speakers with 8 ohm receivers

Thanks,

Sony STRDG 720 is rated 105Wx 7 at 8ohms. If you see the back of your receiver, you will note that Sony has specifically written near the speaker tereminals: Speaker Impedence = Use 8 to 16 Ohms.



It is recommended that you pick up a pair of 8ohm speakers for your surrounds to connect with this receiver. Though, of course you will be able to run the 4 ohm speakers that you have but it might spoil you receiver in the long run.



Just for you to understand my logic for my recommendation is that a 4 ohm speaker places a heavier load on the amp. The advantage being, you get more power, the drawback, the amp runs hotter, and it needs to have enough reserve and current capacity to handle a 4 ohm load without clipping or overheating.

Thats the reason most car speakers are 4 ohm, so that you can get higher power levels out of amps driven by a 12 volt electrical system, without having to use an inverter to boost the voltage.

An 8 ohm speaker requires twice the voltage to get the same amount of current through the coil as a 4 ohm speaker. While this isn't really an issue with home equipment, which can provide a higher voltage so accordingly amp/reciever are built that way.
Thanks and enjoy connecting.

Please do rate this solution and thanks for using FixYa!
Thanks,
Sony STRDG 720 is rated 105Wx 7 at 8ohms. If you see the back of your receiver, you will note that Sony has specifically written near the speaker tereminals: Speaker Impedence = Use 8 to 16 Ohms.

It is recommended that you pick up a pair of 8ohm speakers for your surrounds to connect with this receiver. Though, of course you will be able to run the 4 ohm speakers that you have but it might spoil you receiver in the long run.

Just for you to understand my logic for my recommendation is that a 4 ohm speaker places a heavier load on the amp. The advantage being, you get more power, the drawback, the amp runs hotter, and it needs to have enough reserve and current capacity to handle a 4 ohm load without clipping or overheating.

Thats the reason most car speakers are 4 ohm, so that you can get higher power levels out of amps driven by a 12 volt electrical system, without having to use an inverter to boost the voltage.
An 8 ohm speaker requires twice the voltage to get the same amount of current through the coil as a 4 ohm speaker. While this isn't really an issue with home equipment, which can provide a higher voltage so accordingly amp/reciever are built that way.
Thanks and enjoy connecting.
Please do rate this solution and thanks for using FixYa!