just some new guy questions
Im not an audiophile type but I do like loud booms and nice sound, so I bought a decent onkyo reciever and a polk monitor 5.1 set on sale.
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The monitor 65t specifies 8ohms impedance.* When the shorting bars are removed from the binding posts what is the impedance of each driver?* Is it 2 16ohm drivers with the shrting bars removed?* The 8 would come from 2 16ohm loads paralelled making 8ohms right?
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Which set of binding posts feed the tweeter and which feed the woofer when the bars are removed?*
Intuitively the upper set to feed the high and lower set to feed the low?
*
I am kind of a tinkerer, so I may try biamping for fun though I realize most in the know say bullcrap to biamping from a AV reciever.* I may just try it just for fun and try to hear something out of it.
*
The onkyo TX-NR818 specifies 135W/channel into 8 ohms with 2 channels driven.* I specifically asked what the max power per channel would be with 5 channels driven and 7 channels driven would be.* The replied and specifically stated
"The TX-NR818 is rated at 135 per channel at 8 ohms. That rating will be the same with 5 channel and 7 channel driven which is 135 per channel at 8 ohms with 5 and 7 channels driven."
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Im not sure I totally believe that.* I thought all AV recievers derated their outputs with more channels driven.* I amost tempted to power each channel in whole house mode into 8 ohm power loads and measuring the power directly.* If its true that each channel is putting out 135 real watts max, then there would be a benfit of biamping vs powering with only 1 135W channel. if thats really the case.* Any thoughts?
*
The monitor 65t specifies 8ohms impedance.* When the shorting bars are removed from the binding posts what is the impedance of each driver?* Is it 2 16ohm drivers with the shrting bars removed?* The 8 would come from 2 16ohm loads paralelled making 8ohms right?
*
Which set of binding posts feed the tweeter and which feed the woofer when the bars are removed?*
Intuitively the upper set to feed the high and lower set to feed the low?
*
I am kind of a tinkerer, so I may try biamping for fun though I realize most in the know say bullcrap to biamping from a AV reciever.* I may just try it just for fun and try to hear something out of it.
*
The onkyo TX-NR818 specifies 135W/channel into 8 ohms with 2 channels driven.* I specifically asked what the max power per channel would be with 5 channels driven and 7 channels driven would be.* The replied and specifically stated
"The TX-NR818 is rated at 135 per channel at 8 ohms. That rating will be the same with 5 channel and 7 channel driven which is 135 per channel at 8 ohms with 5 and 7 channels driven."
*
Im not sure I totally believe that.* I thought all AV recievers derated their outputs with more channels driven.* I amost tempted to power each channel in whole house mode into 8 ohm power loads and measuring the power directly.* If its true that each channel is putting out 135 real watts max, then there would be a benfit of biamping vs powering with only 1 135W channel. if thats really the case.* Any thoughts?
Post edited by jrchand on
Comments
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The speakers stay at 8 ohms, straps on or off.
No, the receiver will not put out the same power with 5 or 7 channels driven. If so, they would not have said "2 channels driven" in their specs.HT SYSTEM-
Sony 850c 4k
Pioneer elite vhx 21
Sony 4k BRP
SVS SB-2000
Polk Sig. 20's
Polk FX500 surrounds
Cables-
Acoustic zen Satori speaker cables
Acoustic zen Matrix 2 IC's
Wireworld eclipse 7 ic's
Audio metallurgy ga-o digital cable
Kitchen
Sonos zp90
Grant Fidelity tube dac
B&k 1420
lsi 9's -
Thought Onkyo rated their outputs in RMS watts not peak....
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My understanding is that if any two or more drivers were playing the same frequencies, then there would be a parallel wiring type of situation wherein the ohm load to the amp would be reduced. But since there are crossovers dividing up the frequency distribution, each driver when sharing the amp channel would maintain its individual ohm characteristic. That's purely a guess on my part, and is not to be taken as fact.Denon X7200WA
LSiM 705 703 704c
Denon DP 400
Yamaha CDC 775 -
thanks for the info folks
