New member Username: Subujoseph
Post Number: 1
Registered: Apr-12
|
Posted on Wednesday, April 25, 2012 - 10:52 GMT Hi Everyone,
I have a Pioneer SX-X360 5.1 channel surround system. The amplifier says to only connect speakers with 4 Ohms impedance.
If I connect speakers with 6 Ohm impedance to the system, will it blow out the amplifier?
Thanks |
Platinum Member Username: Jan_b_vigne
Dallas,
TX
Post Number: 17238
Registered: May-04
|
Posted on Wednesday, April 25, 2012 - 14:07 GMT .
No, you are always safer with a higher impedance load on the amp. Besides, speakers are seldom just one single impedance load, they tend to have additional components not shown in a single impedance spec which make for a more complex load on the amp. But it would be very unusual for a Pioneer to recommend 4 Ohm speakers. Typically a Pioneer is recommended just the opposite - do not connect 4 Ohm speakers. You might want to read the owner's manual again.
. |
Platinum Member Username: Glasswolf
Columbia,
South Carolina
America
Post Number: 14621
Registered: Dec-03
|
Posted on Wednesday, April 25, 2012 - 21:36 GMT Some of their newer class D AV receivers are 4 ohm stable.
That said, 4 ohms is just the minimum nominal impedance for which the amplifier stage is rated to be stable.
6 ohm loads are fine, you'll just put out less power than you wound to a 4 ohm load.
in approximation, and if the amp has no output regulation to alter these results, power and load works like this:
1000 watt amplifier at 4 ohm load will put out 750 watts at 6 ohms, and 500 watts at 8 ohms, not accounting for efficiency, or the fact that typically most amplifiers will not produce quite double the power at half the load, again, depending on the topography of the amp. |
Platinum Member Username: Jan_b_vigne
Dallas,
TX
Post Number: 17241
Registered: May-04
|
Posted on Wednesday, April 25, 2012 - 21:54 GMT .
Four Ohm stable,OK, but why say only four Ohm speakers?
See now I wasn't going to mention the power thing. Now the op will think his system doesn't play loud enough or sound good enough 'cause his speakers are six Ohms. 'Sides, his speakers are only a nominal six Ohms and the amp only produces that sort of power into a load resistor on a test bench. The op is never going to know the difference.
. |
Platinum Member Username: Glasswolf
Columbia,
South Carolina
America
Post Number: 14623
Registered: Dec-03
|
Posted on Thursday, April 26, 2012 - 02:48 GMT for what it's worth, don't concern yourself (OP) with power ratings on an amp. truth be told, I have an amp in my bedroom )16x18 feet floor space) that's rated for around 230 watts per channel at 4 ohms. I'm driving the speakers (two 4 ohm KEF floor speakers, 92dB sensitivity, 115dB peak output) and using a small 10" sub for a 2.1 system, and when I turn the volume up to where the walls are shaking and you have to yell to be heard over the stereo, my amp's VU meters are showing me that I'm using less than 10 watts at peak transients, and an average of about 0.2 to 1.0 watts on average.
In other words, it doesn't really take a lot of power to get extremely loud. |
