Any B&O techies in here? Beolab 2 Powerlink wiring.
Discussion
I want to run a Beolab 2 subwoofer from my Yahama RX-V777 amp. I've also got a second Beolab 2 alongside a pair of Beosound 8000s for the front stage, using the Beolab 2's internal crossover.
I've already taken the 12V switched output from the Yamaha and knocked it down to 4.7V to power up the B&O speakers, but when it comes to feeding the Lab 2 an audio signal, I'm not sure of the best approach.
The Yamaha has 2 sub outputs. Do I feed both of these into the Powerlink cable as L & R, or do I take one sub output and join the L & R together in the Powerlink cable?
I'm assuming the Beolab 2 takes the L & R signal and sums them together internally before splitting the signal off to the full range speakers?
Or would I be better off running the pair of Lab 2s independently of the 8000s and let the Yamaha do the cross over work?
Any help would be much appreciated!
I've already taken the 12V switched output from the Yamaha and knocked it down to 4.7V to power up the B&O speakers, but when it comes to feeding the Lab 2 an audio signal, I'm not sure of the best approach.
The Yamaha has 2 sub outputs. Do I feed both of these into the Powerlink cable as L & R, or do I take one sub output and join the L & R together in the Powerlink cable?
I'm assuming the Beolab 2 takes the L & R signal and sums them together internally before splitting the signal off to the full range speakers?
Or would I be better off running the pair of Lab 2s independently of the 8000s and let the Yamaha do the cross over work?
Any help would be much appreciated!
Edited by SuperchargedVR6 on Friday 13th January 14:51
That is pretty geeky for PH standards, I suspect you're more likely to get a response over on www.beoworld.org forums. The B&O website might have some service manuals you can trawl through too for clues but that's about as much as I can help!
You could ignore the sub outs on it, the sub sits daisy chained with crossover for mains built in from memory.
So Main L/R out of Yamaha to sub and then 8000s from sub.
Tell the Yamaha there is no sub and make sure there is no crossover on the mains,
Or you could of course get a stereo phono to Powerlink cable made up and run it from the sub out of the Yamaha, the use the Yamaha crossovers.
Sub out is mono, both outputs are mono and identical.
So make a stereo to powerlink cable up and test with it to one sub output, you might have to try left s right to see if you get sub signal and if it is not loud enough you might have to use the second sub out, but that is why you make a stereo cable up.
So Main L/R out of Yamaha to sub and then 8000s from sub.
Tell the Yamaha there is no sub and make sure there is no crossover on the mains,
Or you could of course get a stereo phono to Powerlink cable made up and run it from the sub out of the Yamaha, the use the Yamaha crossovers.
Sub out is mono, both outputs are mono and identical.
So make a stereo to powerlink cable up and test with it to one sub output, you might have to try left s right to see if you get sub signal and if it is not loud enough you might have to use the second sub out, but that is why you make a stereo cable up.
Edited by gizlaroc on Sunday 15th January 10:58
Thanks guys
Yeah it is a bit geeky
But you never know, there's always a chance there's someone else on this little planet that wants the same thing!
I recently bought a splitter cable from Soundsheavenly actually, very nice quality. Thanks for the tip, I will run it by him.
Yeah that's what I had in mind for plan A gizlaroc, and would get around the fact the Yamaha (annoyingly) doesn't switch on the sub output with 2 channel music.
But with movies, I like the over bloated thumps and bangs, which you don't get out of the L/R front channels unfortunately. And with separate channels, you can attenuate them accordingly to trim the levels. I need to figure out how the Yamaha behaves with the sub outputs first and work it around that, but Plan A is looking likely at the moment!
It's the same old problem of no one manufacturer covering all the bases and proprietary connections and software!
Yeah it is a bit geeky
But you never know, there's always a chance there's someone else on this little planet that wants the same thing!I recently bought a splitter cable from Soundsheavenly actually, very nice quality. Thanks for the tip, I will run it by him.
Yeah that's what I had in mind for plan A gizlaroc, and would get around the fact the Yamaha (annoyingly) doesn't switch on the sub output with 2 channel music.
But with movies, I like the over bloated thumps and bangs, which you don't get out of the L/R front channels unfortunately. And with separate channels, you can attenuate them accordingly to trim the levels. I need to figure out how the Yamaha behaves with the sub outputs first and work it around that, but Plan A is looking likely at the moment!
It's the same old problem of no one manufacturer covering all the bases and proprietary connections and software!
SuperchargedVR6 said:
Thanks guys
...and would get around the fact the Yamaha (annoyingly) doesn't switch on the sub output with 2 channel music.
On my yamaha amp you can turn on the sub with 2 channel in the settings, although i don't know if that applies an eq which artificially increases the bass....and would get around the fact the Yamaha (annoyingly) doesn't switch on the sub output with 2 channel music.
SuperchargedVR6 said:
It's the same old problem of no one manufacturer covering all the bases and proprietary connections and software!
B&O cover all the bases. You just need a B&O TV, or a beosystem 3/4.Not cheap, but just plug the speakers in and tell it which ones they are. Sorted
Max5476 said:
SuperchargedVR6 said:
Thanks guys
...and would get around the fact the Yamaha (annoyingly) doesn't switch on the sub output with 2 channel music.
On my yamaha amp you can turn on the sub with 2 channel in the settings, although i don't know if that applies an eq which artificially increases the bass....and would get around the fact the Yamaha (annoyingly) doesn't switch on the sub output with 2 channel music.
talkssense said:
SuperchargedVR6 said:
It's the same old problem of no one manufacturer covering all the bases and proprietary connections and software!
B&O cover all the bases. You just need a B&O TV, or a beosystem 3/4.Not cheap, but just plug the speakers in and tell it which ones they are. Sorted
SuperchargedVR6 said:
Max5476 said:
SuperchargedVR6 said:
Thanks guys
...and would get around the fact the Yamaha (annoyingly) doesn't switch on the sub output with 2 channel music.
On my yamaha amp you can turn on the sub with 2 channel in the settings, although i don't know if that applies an eq which artificially increases the bass....and would get around the fact the Yamaha (annoyingly) doesn't switch on the sub output with 2 channel music.
SuperchargedVR6 said:
Yes, very expensive and to be honest, my eyes can't really discern a difference in image quality to compared to an averagely priced HD TV in Currys. It's more their speakers I like.
Just a small point. But don't forget the TVs also include a really good centre speaker, and an AV/surround processor way more powerful than the Yamaha you have had to buy separately. (plus lots of other stuff, like multi room music)gizlaroc said:
What model amp is it?
Yamaha RXV-777. I've emailed Soundsheavenly in the meantime to see what they recommend. I haven't played with AV kit for years, so it's like learning it all over again. Dobly Pro-Logic was all the rage when I first got into it talkssense said:
Just a small point. But don't forget the TVs also include a really good centre speaker, and an AV/surround processor way more powerful than the Yamaha you have had to buy separately. (plus lots of other stuff, like multi room music)
I don't doubt that, but £7K + options for a Beovision 14 (what I'd need to compete with my current TV) is way too spendy for me.The Beosystem 4 looks good, but can't find any info on it, and will be around £5K expect, and doesn't support 4K? It doesn't support iTunes either, which is a HUGE downside for me since my entire media collection uses it.
SuperchargedVR6 said:
gizlaroc said:
What model amp is it?
Yamaha RXV-777. I've emailed Soundsheavenly in the meantime to see what they recommend. I haven't played with AV kit for years, so it's like learning it all over again. Dobly Pro-Logic was all the rage when I first got into it Then adjust the sub to blend properly, make sure the subs crossovers is set to maximum or off, then up the gain so you can hear it. Then adjust on the amp from your seating position.
When in stereo mode with the above configuration you will get your sub working.
You can see what channels are being output on the front display.
Some formats like Pure Direct 'may' just give you left and right channels, but try.
gizlaroc said:
SuperchargedVR6 said:
gizlaroc said:
What model amp is it?
Yamaha RXV-777. I've emailed Soundsheavenly in the meantime to see what they recommend. I haven't played with AV kit for years, so it's like learning it all over again. Dobly Pro-Logic was all the rage when I first got into it Then adjust the sub to blend properly, make sure the subs crossovers is set to maximum or off, then up the gain so you can hear it. Then adjust on the amp from your seating position.
When in stereo mode with the above configuration you will get your sub working.
You can see what channels are being output on the front display.
Some formats like Pure Direct 'may' just give you left and right channels, but try.
The only slight caveat with that is the Beolab 2 subwoofer is not a 5.1 sub in the traditional sense. It is designed to take the bass frequencies away from a B&O full range speaker, so it has no external controls. Hopefully the output from the AV amp jacks is sufficient for enough volume. If not I can look into some kind of external line level booster or something.
gizlaroc said:
From memory the beolab subs do have a setting for gain, but I think it is -0db, -3db and -6db or something like that?
Start with it at -0db and use the levels on the Yamaha to adjust so it blends nicely.
That is probably what they refer to as "Wall", "Corner" and "Free" on the back panel.Start with it at -0db and use the levels on the Yamaha to adjust so it blends nicely.
I've got all the cables from Sounds Heavenly now, so I'll have a play around with it at the weekend and see how it goes!
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