Sound & Vision Receiver Test Bench

[Dazed_and_confused]

http://www.soundandvision.com/content/sony-str-dn1050-av-receiver-test-bench#Qkb3E3xVmjthuMK8.97

Probably a stupid question, but I want to make sure I understand...On this graph, why does the response end around 175 watts? Is that when the volume knob on the receiver reached max?

 

[crossedover]

http://www.soundandvision.com/content/sony-str-dn1050-av-receiver-test-bench#Qkb3E3xVmjthuMK8.97

Probably a stupid question, but I want to make sure I understand...On this graph, why does the response end around 175 watts? Is that when the volume knob on the receiver reached max?

This graph shows that the STR-DN1050’s left channel, from CD input to speaker output with two channels driving 8-ohm loads, reaches 0.1% distortion at 103.8 watts and 1% distortion at 129.9 watts. Into 4 ohms, the amplifier reaches 0.1% distortion at 136.8 watts and 1% distortion at 167.0 watts.


167w was where the test measured its highest output with acceptable distortion. No reason to keep pushing the amp section for a result that is meaningless under listening conditions.

 

[3db]

What crossedover is saying that the Sony could push out more power (not sure how much more ) but at the cost of higher distortion levels that; a) could damage your speakers and b) sound awful while damaging your speakers.

What S&V magazine has measured is what the Sony can safely do without causing speaker damage as long as its only 1 possibly 2 channels driving speakers. If one has a 5.1 and up speaker system attached, the power output drops off more quickly than one crossedover has quoted from the S&V measurements because of the demand of the amplifiers exceeds the capabilities of the power supply to deliver the power.

 

[fmw]

Possibly the point at which clipping becomes audible. The power levels you should consider maximum are those in the printed specifications. Actually, the whole thing is fairly meaningless. You aren't likely to dissipate more than about 20 watts per channel on extreme peaks as long as you use a subwoofer and the receiver's bass management.

 

[slipperybidness]

Possibly the point at which clipping becomes audible. The power levels you should consider maximum are those in the printed specifications. Actually, the whole thing is fairly meaningless. You aren't likely to dissipate more than about 20 watts per channel on extreme peaks as long as you use a subwoofer and the receiver's bass management.

I trust 3rd party measurements vs the vendor's specs.

In EVERY field, not just audio!