Doublt: Speaker Impedance

[Suppu]

what is actually Speaker Impedance means

Problems of connecting 4 ohm speaker to 6 ohm AVR?

Yamaha yht 196 shows 6 ohms min. near speaker terminal




Can I connect 4 ohm speaker to yht196?

and one more
What is the difference between car audio speakers and home speakers?

 

[Shivam]

4 ohm may make the AVR run hot. Don't go for very high volumes then everything should be fine.

 

[spirovious]

Impedance is like resistance that of speaker coil,but value can very depending on frequency fed to it.
Understanding Speaker Impedance - AxiomAudio

 

[Dirac]

Also, best sonic results can be obtained if there is good impedence matching between Output of the DAC in the Amp and the load (speakers).

 

[manindra.mukherjee]

If you go through the Yamaha YHT 196 manual it clearly states that speaker with rated impedance of 6 ohm or more are to be used......what is tries to say is that the amp would drive any 6 ohm and higher rated speaker easily. Connecting a 4ohm speaker might overload the amp at loud volume.

 

[Suppu]

Thanks to all... it's clear...

But in Specifications> Audio Section
shows

Dynamic Power (IHF) (1Channel driven)
Front Speaker 6/4/2 ohms................... 105/130/150 W



What this means...?

 

[spirovious]

Its a dynamic power for short term only when 1 ch driven,not all.If you run all ch,AVR may go in protection.

 

[Suppu]

I don't understand what this
1 channel driven and 2 channel driven actually means?


The manual also says
minimum RMS output (1 channel driven)
(1kHz, 0.9% THD, 6ohm)
Front L/R - 100 W/ch
Center - 100 W
Surround - 100 W/ch
SW (50 kHz, 0.9% THD, 6ohm) - 100 W

....
Minimum RMS output power (1 channel driven)
Dynamic Power (1channel driven)
Maximum useful output power (JEITA, 1channel driven)
what all these means?

 

[manindra.mukherjee]

I don't understand what this
1 channel driven and 2 channel driven actually means?


The manual also says
minimum RMS output (1 channel driven)
(1kHz, 0.9% THD, 6ohm)
Front L/R - 100 W/ch
Center - 100 W
Surround - 100 W/ch
SW (50 kHz, 0.9% THD, 6ohm) - 100 W

....
Minimum RMS output power (1 channel driven)
Dynamic Power (1channel driven)
Maximum useful output power (JEITA, 1channel driven)
what all these means?

I actually called up Yamaha Service to get an idea of what is the overall power output of the amp (HTR 2064) when all channels are driven since this information is nowhere mentioned in the datahseet. The Yamaha rep confirmed that the amp delivers approx 35-40W per channel (20Hz-20KHz , 6 Ohm ) when all channels are driven

 

[Suppu]

More confused

RX-V473 specs. shows

5-channel 575W = 115W x 5 (6 ohms, 1 kHz, 0.9 % THD, 1 ch driven)
400W = 80W x 5 (6 ohms, 20 Hz-20 kHz, 0.09 % THD, 2 ch driven)
675W = 135W x 5 (6 ohms, 1 kHz, 10 % THD, 1 ch driven, JEITA)
RX-V473 - '73 Series Receivers - Yamaha - India

Anyone knows what this 1 ch driven means?

as per the comments above this 115 x 5, 80 x 5 and 135 x 5 are all wrong.

 

[sunilkm]

Impedence:

I will try to explain by the electrical fundamentals.
Impedence in audio world is "resistance" in electrical theory.
Let us say you are connecting 4 ohms speaker to your amp ( amp is rated to drive 6 ohms or higher ). In this case the speaker will draw more current from amp as the impedence is low. In another way it is like you are pushing the amplifier to deliver more current due to low resistance path. This is not good.

The RX-V473 spec says the power output when you drive the speakers of different impedence. As explained above when impedence is lower current draw is more and the power output will be more. Usually as per the standards they publish the spec 1 ch driven or 2 ch driven with the THD limits. THD is the total harmonic distortion of the audio signal and lesser is better. But when the amp is driving all 5 channels the power may be lesser to what is given in the spec.
Hope this helps to some extend.