impedance help!!!

[jordan21]

i am running my fronts and center speakers that are a 8 ohm impedance

my surrounds are 6 ohms impedance

my receiver can be st at 6 or 8 ohms, which should i use??


also my lfe setting can be set to sub only or sub and fronts(both)

which is recommended, thanks

 

[nick1000000]

I would set it to 6 ohms. The fronts and center speakers are up to 8 ohms so they will be fine. Your receiver will not have to work too hard driving them all at 6 ohms.

 

[bandphan]

the sub setting depends on your speakers. If your spkr can get down to 35hz id do both if not sub only and set your speaker size to small.(especially the if you watch movies over listening to music), is your reciever a thx certified?

 

[MDS]

If you set the LFE to sub only then any LFE (the .1 channel) will be sent to the sub and any bass from channels set to Small will also be sent to the sub.

If you set it Both then the LFE will go to the sub, any bass from channels set to Small will go to the sub, AND bass below the xover for the front channels will go to the sub. Note that this setting implies Large for the fronts.

 

[jordan21]

thank you

so is the 6 ohm setting what i want to stick with or do i want 8 ohms

 

[MDS]

The 6 Ohm setting will reduce the rail voltage which by consequence will reduce the available current. It is for UL listing purposes so that the receiever doesn't try to deliver more current than it can reliably do so and get too hot and shut down (or in dire circumstances start a fire). The usual advice is to leave the setting at 8 Ohms and watch the volume. If it gets too hot, turn it down. Since the front three speakers are 8 ohm it really shouldn't be necessary to set the switch at 6 Ohm but for peace of mind you may want to do so.

Either way...you aren't likely to notice much difference given that only the surrounds are 6 Ohm and they don't get much action anyway.

 

[jordan21]

my speakers are energy speakers
the center channel is the c-c50
and my fronts are c-50's

these are the specs

Nominal Impedence: 8 ohms; Minimum Impedance: 4 ohms
65Hz-20kHz +/- 3 dB

if i can get anymore feedback that would be great

 

[bandphan]

The 6 Ohm setting will reduce the rail voltage which by consequence will reduce the available current. It is for UL listing purposes so that the receiever doesn't try to deliver more current than it can reliably do so and get too hot and shut down (or in dire circumstances start a fire). The usual advice is to leave the setting at 8 Ohms and watch the volume. If it gets too hot, turn it down. Since the front three speakers are 8 ohm it really shouldn't be necessary to set the switch at 6 Ohm but for peace of mind you may want to do so.

Either way...you aren't likely to notice much difference given that only the surrounds are 6 Ohm and they don't get much action anyway.

that should be all you need to get going... enjoying the experience

 

[jordan21]

okay so i will leave it at 8 ohms then, thanks

for my lfe, with these speakers should it be sub only though?

 

[bandphan]

yes and speakers to small

 

[Halon451]

I would leave the LFE set to sub only to minimize any phasing issues between your fronts and the sub, in whatever frequency range they may overlap. I had mine set to both for a while, but after I switched it to 'sub only' the first thing I noticed was how much clearer and controlled the bass output became.

I agree with MDS too - you can leave the receiver set to 8 ohms as the rears aren't going to be driven that hard anyway, but keep a check on it. If there is any problem the reciever should go into protect mode before damage occurs, but I would think this is even unlikely in your case.

Ideally - match all speakers for the same nominal impedance rating - as you may or may not know, these ratings are nominal as a speaker is an inductive load, rather than a resistive one. Like any inductor or coil (that opposes a change in current - in this case, the speaker level signal going to your drivers), it's impedance will vary at different frequencies. If all of your speakers are 8 ohm for example, then it becomes a non-issue, and one less thing you have to worry about.

 

[jordan21]

thanks for the help guys, i appreciate it

 

[mtrycrafts]

my speakers are energy speakers
the center channel is the c-c50
and my fronts are c-50's

these are the specs

Nominal Impedence: 8 ohms; Minimum Impedance: 4 ohms
65Hz-20kHz +/- 3 dB

if i can get anymore feedback that would be great

Set the receiver to 8 Ohms.