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Thread: Bi-Wiring Yamaha RX 797 Stereo Receiver |
    
New member Username: Teej777
Post Number: 1
Registered: Jan-08
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| Posted on Sunday, February 10, 2008 - 02:07 am: |
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Hey guys
I just picked up a Yamaha RX 797 stereo receiver and Yamaha NS 777 tower speakers. The speakers are bi-wirable. I am running the receiver in Speakers A& B mode, Connecting both the low frequencies to the Speaker B terminals and the highs to the Speaker A terminals in the receiver. I feel that there has been a real improvement- tighter bass and clear highs. Is this bad for the amp? The speakers are 6 Ohms and as per the instructions on the receiver I can run A&B speakers together only if the Ohms is not less than 8. My question is, if i do not crank up the volume too much,will my amp be ok ?
I hope my question is clear?
Thanks
Teej |
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Relevant Product Info
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Gold Member Username: Nuck
Post Number: 9764
Registered: Dec-04
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| Posted on Sunday, February 10, 2008 - 10:22 am: |
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TJ, the bi-wiring on the speakers will greatly alter the load that the receiver sees, good or bad, so the 6 ohm rating is out the window.
In fact it already meant very little anyhow.
If your receiver will run the load without shutting down, that is one thing, but mind the temperature of the receiver. Not too hot, or the lifespan of the thing will be compromised at the least.
If it ever shuts down, then change your usage. |
Platinum Member Username: Jan_b_vigne
Dallas,
TX
Post Number: 12255
Registered: May-04
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| Posted on Sunday, February 10, 2008 - 01:33 pm: |
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" ... the bi-wiring on the speakers will greatly alter the load that the receiver sees ... "
How's it do that? |
New member Username: Teej777
Post Number: 2
Registered: Jan-08
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| Posted on Monday, February 11, 2008 - 03:22 am: |
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Thanks a ton Nuck. Will keep an eye on the heat generated.
Just another point, when I Bi-wire in the A+B Speaker mode ('A' terminals driving both the highs and 'B' terminals driving both the base) are the speakers actually in parallel connection or series?
(I was reading through the Yamaha NS 777 speaker user manual and they reccomend connecting the speakers bi-wired with the receiver in the A+B mode.Is there a chance that they have designed the Yamaha receivers accordingly???)
Sorry if am being a pain.
Cheers
TJ |
Gold Member Username: Nuck
Post Number: 9774
Registered: Dec-04
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| Posted on Monday, February 11, 2008 - 11:56 am: |
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Geez, the button is NO, not YES TO POST.
I know I was thinking bi-amp.
Sorry TJ, but the heat thing is right. |
Silver Member Username: Dmitchell
Ottawa,
Ontario
Canada
Post Number: 645
Registered: Feb-07
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| Posted on Monday, February 11, 2008 - 08:29 pm: |
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Just out of curiosity Jan or Nuck, how would running the amp in this configuration lower the impedance too much? Wouldn't bi-wiring A+B really be the same as running A+B with 2 different sets of speakers?
TJ - I have the same receiver in my secondary system. As much as people malign Yamaha gear, I really don't mind mine. |
New member Username: Teej777
Post Number: 3
Registered: Jan-08
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| Posted on Tuesday, February 12, 2008 - 02:37 pm: |
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Hey David
Bi-wiring A+B is the same as running A+B with 2 different sets of speakers. BUT as per the manual of my receiver, I am not supposed to go below 8 Ohms if i am using A+B speakers. My speakers (YAMAHA NS 777) are 6 Ohms hence the worry.
I agree that the Yam RX 797 is not too bad at all. The THD is one of the lowest in receivers in this price range.
cheers |
Silver Member Username: Dmitchell
Ottawa,
Ontario
Canada
Post Number: 650
Registered: Feb-07
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| Posted on Tuesday, February 12, 2008 - 02:45 pm: |
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I'm running PSB Alpha's on A (6 Ohms) and Tannoy Mercury MX4's on B (8 Ohms). No issues. |
New member Username: Teej777
Post Number: 4
Registered: Jan-08
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| Posted on Tuesday, February 12, 2008 - 03:14 pm: |
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cool... looks like am gonna stick to my current set up! |
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New member Username: 519sledr
Post Number: 1
Registered: Apr-08
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| Posted on Tuesday, April 29, 2008 - 12:21 pm: |
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Why not twist the wires together and connect them to your A's. This is the setup I ran with my NAD 7100/2100/Paradigm Esprit Monitors and achieved very good results. |
Platinum Member Username: Nuck
Post Number: 10137
Registered: Dec-04
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| Posted on Tuesday, April 29, 2008 - 05:37 pm: |
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Ev, the load presented to the amp is different in other configurations.
Simply paralleling the connections induces a very low ipedence level to the amp, and *may* be a different load than connecting A&B.
I do not recommend running paralled outputs from an amp.
Even though your set is fine, man. |
