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  1. #51
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    Re: Luxman M900u Monos and C900u

    Quote Originally Posted by Rob181 View Post
    Thanks for your response...a great learning curve for me...
    Would you please provide a couple of examples of quality amps with high headroom or current...
    What do you look for in the specs...
    High current capacity can be indicated by amps that "double down", which means doubling their output power each time the load impedance is halved as you go down into 4, 2, or even 1 ohm loads. There are quite a few that double into 4 ohms, but fewer that can do it again into 2 or 1 ohms. If you're looking at higher power amps then the max power into really low impedances (like 2 or 1 ohm loads) can limit out due to available power of the incoming AC which may be either a 15A or 20A circuit. Amps like most Luxman and Accuphase are rated down to 1 ohms (in unbridged mode) but they get pretty expensive, and not all speakers require such power reserves and low impedance drive capacities so they can be considered overkill. Any amp is going to sound better when running well within its power ratings and not near its rated capacity. Another thing to keep in mind is that we're talking about solid state amps without output transformers here. Tube amps generally use output transformers (other than OTLs) and some solid state amps do as well like McIntosh, which will not increase power output into lower impedance loads.

  2. #52

    Re: Luxman M900u Monos and C900u

    Thanks audio bill; amp arrived today. Evidently, need a forklift here... I'm ordering a Rowland Capri 2 as the temporary pre amp. We'll see how this works.. Yep, the goal is migrating to the 900u combo. The Bel Canto EX DAC is another very strong contender since it has the DAC (better than the PSA DS II) and the streamer/Arender feature. Anyway, thanks for your comments.

  3. #53
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    Re: Luxman M900u Monos and C900u

    Quote Originally Posted by Stereo Addict View Post
    Thanks audio bill; amp arrived today. Evidently, need a forklift here... I'm ordering a Rowland Capri 2 as the temporary pre amp. We'll see how this works.. Yep, the goal is migrating to the 900u combo. The Bel Canto EX DAC is another very strong contender since it has the DAC (better than the PSA DS II) and the streamer/Arender feature. Anyway, thanks for your comments.
    I'm a pretty big guy but getting older and can relate regarding the weight of the M-900u... I had to use a dolly to move the amp which arrived strapped to a pallet, and then had to get help to unpack and move it into place on my rack. I'm sure you'll enjoy it, be sure to let us know how it goes!

  4. #54

    Re: Luxman M900u Monos and C900u

    Quote Originally Posted by Kingrex View Post
    I apologize if I remembered incorrectly. I know he had done a lot of listening and thought the amps were amazing.. Maybe I confuse some of his results with the stereophile review or other publication. My apologies again. I myself was looking hard for white Camaros reviews about a week ago when talking with somebody about an m600 a for myself. I was having a hard time finding it. I actually never did. I have read about these amps in as many places as possible as I'm pretty interested in them.
    The Audiogon link is here: https://forum.audiogon.com/discussio...review-of-each

    and it's by https://forum.audiogon.com/users/whitecamaross

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  6. #56
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    Re: Luxman M900u Monos and C900u

    Welcome to the forum Charles, thank you for joining.
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  7. #57
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    Re: Luxman M900u Monos and C900u

    what tube preamps work best with Luxman m900u? and is balanced or single ended the best route?
    Brinkmann Bardo w/ EMT HSD-006 cart, MSB Reference DAC --> Linear Tube Audio MicroZOTL --> Ampzilla 2000, 2nd Edition --> Fyne Audio F1-12

  8. #58
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    Luxman M900u Monos and C900u

    Quote Originally Posted by KeithR View Post
    what tube preamps work best with Luxman m900u? and is balanced or single ended the best route?
    The new top dog tube preamp, Luxman CL1000 making it’s world debut next week in Munich would be an obvious choice.

    And either balanced or SE sounds great.



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  9. #59
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    Re: Luxman M900u Monos and C900u

    Quote Originally Posted by Mike View Post
    The new top dog tube preamp, Luxman CL1000 making it’s world debut next week in Munich would be an obvious choice.

    And either balanced or SE sounds great.



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  10. #60
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    Re: Luxman M900u Monos and C900u

    Quote Originally Posted by Rob181 View Post
    Mike & other Sharks....
    Please correct me if I am wrong...
    It is my understanding that you have to be careful bridging amps...
    When you bridge amps...you you double the output impedance to the speakers...in doing so you may cause a mismatch..
    eg...if the amp struggles at 2 ohms or lower dips in speakers ...then you bridge it...it will then struggle at 4 ohms or lower...
    Look forward to wiser heads than me for clarification...
    Thanks...
    Since the M-900u is stable into 1 ohm loads in stereo (rated at 1200W + 1200W), bridged mono operation will be much better than most monos can achieve without bridging.

  11. #61
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    Luxman M900u Monos and C900u

    Quote Originally Posted by GSOphile View Post
    Since the M-900u is stable into 1 ohm loads in stereo (rated at 1200W + 1200W), bridged mono operation will be much better than most monos can achieve without bridging.
    Exactly! Hence my reason for asking about amps. I think this pairing with B&W should be awesome. Even the price points line up beautifully. And Luxman Japan uses B&W in the factory for testing.


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  12. #62

    Re: Luxman M900u Monos and C900u

    Quote Originally Posted by GSOphile View Post
    Since the M-900u is stable into 1 ohm loads in stereo (rated at 1200W + 1200W), bridged mono operation will be much better than most monos can achieve without bridging.
    Please note that 1200W is peak and not continuous.

  13. #63
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    Re: Luxman M900u Monos and C900u

    Quote Originally Posted by Adyc View Post
    Please note that 1200W is peak and not continuous.
    Adyc, yes, you are correct; however, this amp is designed to excel in both stereo and bridged monaural configurations (2400 watts instantaneous into 2 ohms monaural), so no worries for most demanding speakers.

  14. #64

    Re: Luxman M900u Monos and C900u

    Quote Originally Posted by GSOphile View Post
    Adyc, yes, you are correct; however, this amp is designed to excel in both stereo and bridged monaural configurations (2400 watts instantaneous into 2 ohms monaural), so no worries for most demanding speakers.
    I agree. It seems that this amp is very good for low impedance speaker. Some amps simply shutdown at 1 ohm.

  15. #65
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    Re: Luxman M900u Monos and C900u

    Hey Mike.... any big difference upgrading from L-509X Integrated to an M-900u Amp?

  16. #66
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    Re: Luxman M900u Monos and C900u

    Quote Originally Posted by thyname View Post
    Hey Mike.... any big difference upgrading from L-509X Integrated to an M-900u Amp?
    Oh yes.


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  17. #67

    Re: Luxman M900u Monos and C900u

    Sorry, but I couldn't not respond to this: "We can hear everything we measure, but we can't measure everything we hear" This is patently false. We can measure frequencies up to 100Ghz, and sound levels of 180db (a volcano explosion) and up. Can you hear all of that?
    Actually, we can measure everything we hear, although not always know what to measure. maybe that is what you meant.

  18. #68
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    Re: Luxman M900u Monos and C900u

    Welcome to the forum, thank you for joining.
    Fleetwood Deville by Oswald Mills Audio, Vienna Acoustics Haydn Jubilee, Wharfedale Linton w/ stands, Klipsch RB-75, Klipsch RP-160M.

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  19. #69
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    Luxman M900u Monos and C900u

    Quote Originally Posted by taviran View Post
    Sorry, but I couldn't not respond to this: "We can hear everything we measure, but we can't measure everything we hear" This is patently false. We can measure frequencies up to 100Ghz, and sound levels of 180db (a volcano explosion) and up. Can you hear all of that?
    Actually, we can measure everything we hear, although not always know what to measure. maybe that is what you meant.
    That is true, but we also can’t measure and interpret things we can hear. We can’t measure soundstage and if we could, we wouldn’t be able to interpret it, in addition to other items such as tone.

    I’m curious, you joined in 2015 and this is your first post?

    A new timely post today by Paul McGowan of PS Audio:

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  20. #70
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    Re: Luxman M900u Monos and C900u

    Gotta agree with the rest of this thread. the Lux C-900u is superb. very well built, very well balanced smooth sound, very quiet.
    For the price of admission its a high end bargin.

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  21. #71
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    Re: Luxman M900u Monos and C900u

    Luxman is awesome and the C900u really is superb. Glad you agree.
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  22. #72

    Re: Luxman M900u Monos and C900u

    Jaysus, turn those Ultra 5's up the other way there downunder.

  23. #73
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    Re: Luxman M900u Monos and C900u

    Quote Originally Posted by sharkmouth View Post
    Jaysus, turn those Ultra 5's up the other way there downunder.
    I like them better that way Kev
    Source: Technics SP10mk3 - Thales Simplicity II, TW Raven AC-3 - Graham Phantom, SME 3012-R, Exclusive P3,,Linn LP12 - Naim ARO
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    Phono Stage: Phasemation EA-1200, Accuphase C-37,TW Acustik phono
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  24. #74
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    Re: Luxman M900u Monos and C900u

    The PS Audio video parallels what Emmanuel Go of First Sound Audio told me about how he designs his preamp. I talked about it being an "Art" on Audionirvana and a poster "Tech" got all over me saying i was all wrong. It's all science. We can measure everything. I disagreed. I don't believe measurements are the end all. Science is needed to deaign the circuit. It's the "artist" who tweeks the circuit by ear to make it sound a certain way. Ot so I believe, and some builders I know practice.

  25. #75
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    Re: Luxman M900u Monos and C900u

    Hi Mike

    What speaker cable and interconnects you used on this setup?

  26. #76
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    Re: Luxman M900u Monos and C900u

    I agree. It’s like every cook can follow a recipe, but the great ones tweak here and there for the best tasting dish.


    Quote Originally Posted by Kingrex View Post
    The PS Audio video parallels what Emmanuel Go of First Sound Audio told me about how he designs his preamp. I talked about it being an "Art" on Audionirvana and a poster "Tech" got all over me saying i was all wrong. It's all science. We can measure everything. I disagreed. I don't believe measurements are the end all. Science is needed to deaign the circuit. It's the "artist" who tweeks the circuit by ear to make it sound a certain way. Ot so I believe, and some builders I know practice.
    Fleetwood Deville by Oswald Mills Audio, Vienna Acoustics Haydn Jubilee, Wharfedale Linton w/ stands, Klipsch RB-75, Klipsch RP-160M.

    Job INTegrated. Luxman L-595aSE

    NAD C 658 streamer.

    First Watt SIT-3, Job 250 Monos, NuForce STA200, AkitikA GT-102 amp, ASL Wave monos, Dennis Had 45 monos. Absolute Audio Labs PCF 25 amp (improved First Watt F7 super clone)

    Topping D90, RME Audio ADI-2 DAC FS, ModWright Ultimate Sony XA-5400ES.

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  27. #77

    Re: Luxman M900u Monos and C900u

    Quote Originally Posted by Mike View Post
    Mono Vs Stereo:

    - Mono has bigger soundstage.
    - Mono Sounds slightly smoother.
    - Mono has better transients
    - Stereo has more focus, tighter soundstage

    Overall, very close sonically. The power cable you pick has a MUCH bigger impact on the sound. For example, choosing the right power cable makes a much bigger difference than mono Vs Stereo.

    Recommended cable on the Luxman: AQ Tornado, Hurricane, etc.



    Sent from my iPhone using Tapatalk
    Thinking about buying a M-900U because it has enough power for my Revel Salon 2 but your impression makes me want 2 for monos No home demo is available in my country so I have to buy them blind to replace my current Mcintosh MC462. Do you think one (or 2) Luxman M-900U(s) will be a good match with the Revel Salon 2?

  28. #78
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    Re: Luxman M900u Monos and C900u

    Quote Originally Posted by aRui View Post
    Thinking about buying a M-900U because it has enough power for my Revel Salon 2 but your impression makes me want 2 for monos No home demo is available in my country so I have to buy them blind to replace my current Mcintosh MC462. Do you think one (or 2) Luxman M-900U(s) will be a good match with the Revel Salon 2?
    The Revel Salon 2 speakers thrive on high power and would definitely benefit from a pair of Luxman M-900u amps.

  29. #79
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    Re: Luxman M900u Monos and C900u

    Quote Originally Posted by aRui View Post
    Thinking about buying a M-900U because it has enough power for my Revel Salon 2 but your impression makes me want 2 for monos No home demo is available in my country so I have to buy them blind to replace my current Mcintosh MC462. Do you think one (or 2) Luxman M-900U(s) will be a good match with the Revel Salon 2?
    The Salon 2’s need SLAM! With the wrong amps, they can sound like to woofers are broken. You need a bottom up amp. Bass first amp. May I suggest an Antilleon Evo.

    The M900’s are beautiful sounding, wonderful mids and highs, but they aren’t a bass first amp.


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    "We can hear everything we measure, but we can't measure everything we hear. Let your ears be your guide."

    Dealer for: Aqua Hi-Fi, Aurender, AudioQuest Cables & Power Products, Berkeley Audio, Block Audio (distributor), Boulder Amplifiers, Bowers & Wilkins (B&W), Bryston, Clarisys Audio Loudspeakers (distributor), Classe’ Audio, Degritter Record Cleaning Machines, Esoteric, Finite Elemente, FirstWatt, Focal Loudspeakers and Headphones, GigaFoil, Harbeth Loudspeakers, Hegel, HiFi Man, Innuos, ISO Acoustics, Keces Power Supplies, Kharma Loudspeakers and Electronics, Kuzma Turntables, Lumin, Luxman, Magico Loudspeakers, MBL Speakers & Electronics, MSB Technologies, MySonicLabs Phono Cartridges, Nordost Cables, Ortofon, Pass Labs, Quadraspire, Rega Turntables and Electronics, Shunyata Research, STAX, Stein Music Products, Stillpoints, Soulution, VAC, Vicoustics, Viva Audio, VPI Industries, WireWorld Cables.

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  30. #80

    Re: Luxman M900u Monos and C900u

    Quote Originally Posted by audio.bill View Post
    The Revel Salon 2 speakers thrive on high power and would definitely benefit from a pair of Luxman M-900u amps.
    Yes. I think I will get 2. When I began this hobby, me and my brother went to a shop to audition some hifi gears, the Mcintosh and Sonus Faber. I thought the system the shop played by then was Kharma speakers with 2 M-900Us when we stepped into the shop. We was blown away by the sound of Kharma and 900U pre pow, never thought that it could be such natural and life-like. But it was more than 3 years ago and I did not want to spend that much money for 'beginner' by then.

  31. #81

    Re: Luxman M900u Monos and C900u

    Quote Originally Posted by Mike View Post
    The Salon 2’s need SLAM! With the wrong amps, they can sound like to woofers are broken. You need a bottom up amp. Bass first amp. May I suggest an Antilleon Evo.

    The M900’s are beautiful sounding, wonderful mids and highs, but they aren’t a bass first amp.


    Sent from my iPhone using Tapatalk Pro
    I agree that the Salon 2 need SLAM. The Mcintosh has slam but the slam is not refined. 2 subwoofers with Room Correction on my Anthem STR Preamp do the trick on the bass slam very well but the Mc's mid and high is not smooth and lack of 'flow'.
    Luxman M900U is affordable in my country and it is only $10k for each here, I do like the silky smooth sound of the Luxman. I guess the 2 subwoofers will also do the trick on the M900U because I let the subs handle the sub-bass region (below 60hz) just like what I did with the Mcintosh. Do you think the trick works?
    The Gryphon is overpriced and not available for demo in my country, I wouldn't want to spend that much money for something I can't audition.

  32. #82
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    Re: Luxman M900u Monos and C900u

    Mike

    Would the Luxman M900u form a good synergy with something like a Kharma? Thanks.


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    Re: Luxman M900u Monos and C900u

    Quote Originally Posted by aRui View Post
    Yes. I think I will get 2. When I began this hobby, me and my brother went to a shop to audition some hifi gears, the Mcintosh and Sonus Faber. I thought the system the shop played by then was Kharma speakers with 2 M-900Us when we stepped into the shop. We was blown away by the sound of Kharma and 900U pre pow, never thought that it could be such natural and life-like. But it was more than 3 years ago and I did not want to spend that much money for 'beginner' by then.
    aRui

    I have Kharma but in search of the amp for them. Thanks for the tip.


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  34. #84
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    Re: Luxman M900u Monos and C900u

    Quote Originally Posted by Mike View Post
    The Salon 2’s need SLAM! With the wrong amps, they can sound like to woofers are broken. You need a bottom up amp. Bass first amp. May I suggest an Antilleon Evo.

    The M900’s are beautiful sounding, wonderful mids and highs, but they aren’t a bass first amp.
    Thanks for sharing your experience and insights Mike.

    How about my Focal Stella Utopia Evo's? 94db sensitivity, 8ohm nominal, 2.8ohm minimal, with 13" electromagnetic woofer. Would you recommend the M-900u in stereo or mono? Or would you recommend another amp all together?

    Room is a 1,200 sqft. living room with big openings to hallways.

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    Re: Luxman M900u Monos and C900u

    Quote Originally Posted by robert1976 View Post
    Thanks for sharing your experience and insights Mike.

    How about my Focal Stella Utopia Evo's? 94db sensitivity, 8ohm nominal, 2.8ohm minimal, with 13" electromagnetic woofer. Would you recommend the M-900u in stereo or mono? Or would you recommend another amp all together?

    Room is a 1,200 sqft. living room with big openings to hallways.
    I would go Boulder with Focal or VAC. Pass X260.8/XP22 would be another more cost effective option. The Luxman m900/c900 would be very good too, but I would want more meat on the bones with the Focal tweeter.


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    Re: Luxman M900u Monos and C900u

    Quote Originally Posted by Mike View Post
    The Luxman m900/c900 would be very good too, but I would want more meat on the bones with the Focal tweeter.
    Thank you Mike. So more meat on the bones... could that be solved by increasing bass control on the C-900u?

    If not, which Boulders do you suggest?

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    Re: Luxman M900u Monos and C900u

    Quote Originally Posted by robert1976 View Post
    Thank you Mike. So more meat on the bones... could that be solved by increasing bass control on the C-900u?

    If not, which Boulders do you suggest?
    Well, if I had those speakers, I would do 2110/2160. But 1110/1160 would be dynamite too.


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    Re: Luxman M900u Monos and C900u

    Quote Originally Posted by Mike View Post
    Well, if I had those speakers, I would do 2110/2160. But 1110/1160 would be dynamite too.
    Would playing the 2120 straight into the 2160 be a good idea? I only stream from Tidal.

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    Re: Luxman M900u Monos and C900u

    Quote Originally Posted by robert1976 View Post
    Would playing the 2120 straight into the 2160 be a good idea? I only stream from Tidal.
    I haven’t tried it. It came out 4 years ago, so I’ve been holding off to see if something new comes out. I am eyeing that 2108 though.


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    Re: Luxman M900u Monos and C900u

    Quote Originally Posted by Mike View Post
    I haven’t tried it. It came out 4 years ago, so I’ve been holding off to see if something new comes out. I am eyeing that 2108 though.
    Boulder is hard to audition at my current location. Would Focal Stella be good with Audionet Stern / Heisenberg, or the Humboldt?

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    Re: Luxman M900u Monos and C900u

    Quote Originally Posted by robert1976 View Post
    Boulder is hard to audition at my current location. Would Focal Stella be good with Audionet Stern / Heisenberg, or the Humboldt?
    I haven’t heard those enough to comment. Where are you located?
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  42. #92
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    Re: Luxman M900u Monos and C900u

    Shah Alam Malaysia?
    Fleetwood Deville by Oswald Mills Audio, Vienna Acoustics Haydn Jubilee, Wharfedale Linton w/ stands, Klipsch RB-75, Klipsch RP-160M.

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  43. #93
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    Luxman M900u Monos and C900u

    Quote Originally Posted by joeinid View Post
    Shah Alam Malaysia?
    If it is Malaysia, then good luck with an audition. I live there and won’t be able to listen to a Boulder unless I drove over to Singapore to do so. The Boulder dealer for both Malaysia and Singapore also deal with the Focals.

    Mark Levinson, Accuphase, ARC, Gryphon have got a good presence there not Boulder. Luxman had just came into the picture recently.


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  44. #94
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    Re: Luxman M900u Monos and C900u

    [QUOTE=robert1976;319158]Boulder is hard to audition at my current location. Would Focal Stella be good with Audionet Stern / Heisenberg, or the Humboldt?[/QUOTE

    I don’t think there’s a Boulder dealer in Heaven.
    _______________

    Mike

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  45. #95
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    Re: Luxman M900u Monos and C900u

    [QUOTE=Ritmo;319190]
    Quote Originally Posted by robert1976 View Post
    Boulder is hard to audition at my current location. Would Focal Stella be good with Audionet Stern / Heisenberg, or the Humboldt?[/QUOTE

    I don’t think there’s a Boulder dealer in Heaven.

    That’s right! There’s only a CJ dealer in heaven.
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  46. #96
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    Re: Luxman M900u Monos and C900u

    sitting on clouds, father abraham is holding my hand and invites me to sing with the group.

    this is what comes to mind when i listen with heisenbergs. heaven is really the right term for this amplifiers. they really have some kind of cosmic power.
    yes robert, you are on the right track, it would sound fabulous.

  47. #97
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    Re: Luxman M900u Monos and C900u

    Quote Originally Posted by u-sound View Post
    sitting on clouds, father abraham is holding my hand and invites me to sing with the group.

    this is what comes to mind when i listen with heisenbergs. heaven is really the right term for this amplifiers. they really have some kind of cosmic power.
    yes robert, you are on the right track, it would sound fabulous.
    Would you say, heavenly?
    _______________

    Mike

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    Re: Luxman M900u Monos and C900u

    lol, yees.
    and the group your are invited to sing with are the famous 99 xxx

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    Re: Luxman M900u Monos and C900u

    Quote Originally Posted by joeinid View Post
    Shah Alam Malaysia?
    Yes, I live in Malaysia

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    Re: Luxman M900u Monos and C900u

    Quote Originally Posted by Mike View Post
    I haven’t heard those enough to comment. Where are you located?
    I live in Malaysia.

    BTW, I saw this video: Our room at the Florida Audio Expo 2020 - YouTube

    How did you hook up two M-900u's in stereo? One for each speaker? Did you use the bi-amp function on the C-900u using unbalanced cables?

    What's the difference compared to two M-900u's bridged in mono?

    Thanks and I hope you can elaborate a bit

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