Yamaha RX-V479 compatibility with 4 ohms

[Mayank Shah]

These are the quick specs of a Yamaha RXV 479 AVR. I know that there is no mention about 4 ohms specifically, but wondering if it could be used for 4 ohms 86 db only 2ch driven. If not, I shall be putting it up on the forum soon.

 

[raghupb]

AVRs these days generally don't spec out 4 ohm numbers.
This is with good reason; their power supplies are not designed to work with hard to drive speakers.

Since you have both the AVR and speakers with you, give it a try.
Don't rachet up the volume beyond 50%.
Hear out if the SPL is good enough for the room.
Check for distortion and clipping. If it clips early, not worth the pairing.

Cheers,
Raghu

 

[prateekatasniya]

These are the quick specs of a Yamaha RXV 479 AVR. I know that there is no mention about 4 ohms specifically, but wondering if it could be used for 4 ohms 86 db only 2ch driven. If not, I shall be putting it up on the forum soon.View attachment 38170

4 ohm rated speakers go below 4 ohms. Maybe 3.2 or something like that.
So you aren't using full potential of your speakers when played with AVR.

 

[Mayank Shah]

Yes, the only way to find out is to hook them up and see. I have decided to sell my Yamaha and Dali 5.1 setup, but as an afterthought I thought of using the AVR with the M20. Just didn't want to hook up damage anything if I wanted to sell. At moderate volumes and with only 2ch driven, I could get by. Will know once I am back home from work.

Yes....speakers do Dip much below their nominal ohms. I read somewhere that the 8 ohms XT8F dips below 4.

Cheers.

 

[raghupb]

Yes, the only way to find out is to hook them up and see. I have decided to sell my Yamaha and Dali 5.1 setup, but as an afterthought I thought of using the AVR with the M20. Just didn't want to hook up damage anything if I wanted to sell. At moderate volumes and with only 2ch driven, I could get by. Will know once I am back home from work.

Yes....speakers do Dip much below their nominal ohms. I read somewhere that the 8 ohms XT8F dips below 4.

Cheers.

Impedance rating is usually nominal. They can vary up and down.
Only very few manufacturers, like Harbeth, mean 6 ohms when the claim 6 ohms.
Cheers,
Raghu

 

[efernand1]

These are the quick specs of a Yamaha RXV 479 AVR. I know that there is no mention about 4 ohms specifically, but wondering if it could be used for 4 ohms 86 db only 2ch driven. If not, I shall be putting it up on the forum soon.View attachment 38170

As advised, try it for some time at conservative volume levels and see.....usually the AVR would get hot quickly than the regular way it does. Advisable to sell it and get an AVR or Amp which can handle 4 ohms or more impedance loads of speakers.

 

[tuff]

DONT! I damaged my RXV477 when connected to 4ohm 86 db speakers. It played fine on very low volumes. It is not that robust.

 

[raghupb]

DONT! I damaged my RXV477 when connected to 4ohm 86 db speakers. It played fine on very low volumes. It is not that robust.

@Mayank Shah,
Take this advice seriously. Not worth the pain of seeing damaged goods.
Cheers,
Raghu

 

[Mayank Shah]

Advise well taken. Thanks and cheers.

 

[Mayank Shah]

My 479 and Dali 5.1 (Z5/Z3/vokals/ e12f) is going up for sale soon.

 

[MaSh]

• --- 80 W per channel (6 ohms, 20Hz-20kHz, 0.09 % THD, 2 ch driven)
• --- 115 W per channel (6 ohms, 1 kHz, 0.9 % THD, 1 ch driven)
• --- 135 W per channel (6 ohms, 1kHz, 10% THD, 1ch driven)

Nope, I doubt the avr is capable of 4ohms. I guess under the speaker terminals it says 6ohms minimum, does it?

MaSh