Just one detail - the 911 is a dual mono amplifier or does it share a common power supply between channels?
Burmester 911 mk3
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Yes, shared main toroidal power transformer.
But perhaps with separate windings for the Left and Right channels...
{See at top left of that toroidal, and top right of it: two largest blue wires.}
But perhaps with separate windings for the Left and Right channels...
{See at top left of that toroidal, and top right of it: two largest blue wires.}
Whatever it is, magic happens and sweet melodies spring forth. I am a poet and did not know it.
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Joe,
Did you order your 911 mono internally bridged at the factory? I don't know how much difference there is, if any, compared to bridging them externally using the Y-adapters. External bridging will make them more versatile as you can do biamping both horizontally and vertically as and when desired. Any thoughts?
Did you order your 911 mono internally bridged at the factory? I don't know how much difference there is, if any, compared to bridging them externally using the Y-adapters. External bridging will make them more versatile as you can do biamping both horizontally and vertically as and when desired. Any thoughts?
Yes, I would have to send them back to the factory to convert them to stereo amps. From what I understand, internally bridged factory monos are the way to go for ultimate performance. I do not like the idea of extra cabling with the Y-adapters. The more connections, the worse the sound. Why spend that kind of money and not get them configured as monos from the start. Of course, if you think you might want to biamp (with multiple preamp outputs) then by all means get the stereo amps and use multiple interconnects. I would prefer multiple preamp outputs and interconnects to using Y-adapters. My personal preference.
Hey Guys, bear with me here...i know 5 dozen books-worth has been written about this age-old question. But my Gryphon Colosseum is true, dual-mono. It cannot be converted to pure mono. I would have to buy the Gryphon Colosseum monos to do that. However, i could pick up another Gryphon Colosseum dual mono and run 2 dual mono amps...one dual mono running L & R treble and the other running L & R Bass...is this correct? And if correct, does anyone have views on sound vs 'pure' monos where one runs L full range and the other runs R full range? Particularly as these Grpyhon dual-monos are true dual mono where the internals only connect at the plug inlet...would there still expect to be a big sound difference due to the fact that one unit is treble and the other bass? Thanks!!!
(i am one of those guys who is always thinking of my next move even if it years down the road to maximize my optionality for equipment. My long-term next move on speakers might make me want to pick up another Gryphon Colosseum.) Thanks for any advice!!!
Yes correct, this is called 'horizontal' bi-amping. You could also use 2 dual mono's in a 'vertical' bi-amp configuration to run the treble in one channel and bass in the other, one amp per speaker. This evens out the load on the amps and may be preferred over horizontal bi-amping.
Thanks, Joost...just so i understand. If i were to take one dual mono and dedicate it to one channel...i would take both positive terminals from my amp and connect BOTH to the positive terminal on one speaker...and connect BOTH negative terminals from the same amp and connect them both to the negative terminal to the same speaker. So both sides of the dual mono are running, as you say, in a more even way to control on speaker. yes?
Sujay, you can certainly bi-amp stereo 911's. You need to carefully think about the wiring as the length of the adapters will be dependent on how far the amp are apart from each other and whether you want to vertically or horizontally bi-amp. You will need Y adapters/splitters that duplicate a single signal to dual XLR outputs. The dual left outputs are then put in both channels of amp #1, and the dual right outputs are then put into both channels of amp #2 (horizontal biamping). The one channel then is wired to the LF unit and the second channel to the HF drive unit of the speakers. In vertical biamping the two sets of left are routed one to each amp and vice versa for the right.
To operate the 911 in mono mode requires the "mono adapters" and a different connection of the speaker terminals to the back of the 911; instead of red and black for the right channel and blue and black for the left channel you would use the red and the blue terminals, the black terminals are not used. I'm sure Rocco can confirm this.
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Hi to everybody.
The Bi-Amping adapters or Mono Adapters are different between them.
For the concerned wiring diagram operation you should refer to the manual of 911's (page 4)
http://audioaficionado.org/burmester-audio/12673-definitive-911-mk3-manual.html#post273562
The Bi-Amping adapters or Mono Adapters are different between them.
For the concerned wiring diagram operation you should refer to the manual of 911's (page 4)
http://audioaficionado.org/burmester-audio/12673-definitive-911-mk3-manual.html#post273562
first of all, many thanks to both Joost and Rocco....really appreciate your help
the plot thickens though..as i get more and more confused. unfortunately, my technical knowledge on this rivals that of a moron. however, i will tyr and get this right!!
Vertical bi-amping:
- Left output from pre-amp to mono Y adapter. both split outputs into left and right channels of amp #1
- Right output from pre-amp to mono Y adapter. both split outputs into left and right channels of amp #2
- left speaker output of amp #1 to HF of left speaker
- right speaker output of amp#1 to LF of left speaker
- left speaker output of amp #2 to HF of right speaker
- right speaker output of amp #2 to LF of right speaker
does this make sense.......pls pardon my ignorance if it doesnt!
on another note, going by your experience, what works best? biamping or bridged monos?
cheers
sujay
the plot thickens though..as i get more and more confused. unfortunately, my technical knowledge on this rivals that of a moron. however, i will tyr and get this right!!
Vertical bi-amping:
- Left output from pre-amp to mono Y adapter. both split outputs into left and right channels of amp #1
- Right output from pre-amp to mono Y adapter. both split outputs into left and right channels of amp #2
- left speaker output of amp #1 to HF of left speaker
- right speaker output of amp#1 to LF of left speaker
- left speaker output of amp #2 to HF of right speaker
- right speaker output of amp #2 to LF of right speaker
does this make sense.......pls pardon my ignorance if it doesnt!
on another note, going by your experience, what works best? biamping or bridged monos?
cheers
sujay
Hi Sujay,
the vertical bi-amping correctly wrote by your side is the one used by Burmester, but you've to use the correct Y adapters, as well as the Bi-amp adapters. The mono adpters are different and them are used for the mono configuration only.
About the sound difference, I personally never tested the vertical bi-amping, but I can only ensure that in my experience I consider the 911's monoblock one of the best amp at any level.
Thanks for doing this....if i go my route (horizontal), the CJ preamp has 2 pre-outs...so:
- Preamp Out 1 LEFT/RIGHT TO #1 dual mono amp - which goes both Left channels (+/-) to +/- of Treble, both Right channels (+/-) to +/- of Treble
- Preamp Out 2 LEFT/RIGHT to #2 dual mono amp - which goes both Left Channels (+/-) to +/- of Bass, both Right channels (=/-) to +/- of Bass
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