Preamp Noise with High-Efficiency Speakers


I have Avantgarde Duo Classic Speakers, I hear a very audible buzzing noise whenever I insert an analog preamp. If I run my DAC (AMR DP-777) directly into power amp, the noise disappears. I have tried 4 different preamps (tube and SS), 3 different amps, a bunch of RCA and XLR interconnects, the problem persists. I have tried dedicated power line and two power conditioners (with Multi-wave options) and various high-quality power cords, so far nothing works, and I am forced to run DAC-direct into power amp. The buzz is not very loud but certainly audible enough to be annoying. There's no noise running the same equipment and power source into regular speakers, I am pretty sure it's just the Avantgarde (104dB sensitivity). Please share your solution if you have had similar situations. Thanks!
yingtonggao

Showing 15 responses by charles1dad

Roscoeiii and Grannyring,
I know others who patiently tried various passive components in their system based on the predicted advantages. Ultimately they returned to high quality active linestages as they provided a more realistic and natural sound that more closely mimics live instruments and human voice, just as you two discovered.No theory will ever substitute for the personal experience of direct listening with your own ears.Nothing.
Regards,
Bill.
We have a piano in our that sounds beautiful. I attend the local jazz clubs frequently and love them. Any audio component that strips or dilutes that tone,body,weight and dynamics that I hear"always"in live music is a flawed component. If this is voodoo or coloration, I`ll have more please.You tried the Lightspeed "three" times, once would have done it for me.
It seems some prefer a more realistic sound thus the preference for high quality actives.Everything sounds different(not just actives) including passive devices(they have their signatures also) and even going direct the sound varies. Anything inserted into an audio system signal path will make its presence known.So you might as well go with what sounds most real and enjoyable to the individual listener.
Swampwalker,
There`s no arguement,and I`ve said his component has gotten much praise and compliments(Grannyring for example). My point is don`t be condescending and dismissive to those listeners who chose an active component rather than his.All components have their sonic compromises(to some degree) including his Lightspeed.
Atmasphere wrote,"I am of the opinion though that passives loose detail and not that actives add it".Right! I`ve believe this for a long time. That`s why the common complaint concerning passive/direct connection is less,tonal body,weight,timbre and dynamic presence-drive.These are real musical attributes not colorations.
Active tube pre with 300b SET, you`re good to go. Congratulations with solving the problem.Now just enjoy your music.
He just said his sound is the best he`s had so far with the current Avantgarde speaker set up. Leave well enough alone and appreciate the new found sonic joy.
The findings of your musician friend comes as no surprise to me or others. When the full body, tone, color saturation and dynamics are preserved the sound is more realistic and live like. This is confirmed repeatedly when listening to live music. Components that are incapable of delivering this vital (and obvious) musical information are deficient. The complaint that passive or direct can sound lean, thinner and less dynamic is subtraction of information from the audio signal it would seem. If a good active preamp avoids this flaw that would be desirable.
Charles,
Knghifi and Whart,
This improved weight,heft,palpability,3D,dynamics,vividness you hear, well you guys just like pleasant colorations.Never mind that it sounds closer to live instruments,doesn`t matter. If you don`t hear it as george does,you`re wrong. Why is that so hard for you guys to understand.Grannyring and Knghifi(and others) purchased his passive and preferred their active preamp,wrong choice guys.Why be silly and choose the component that sounds more realistic,who wants that anyway?
Whart,
I understand where you`re coming from and agree.What`s annoying to me is the condescending 'know it all' attitude toward those who`ve reach a different conclusion from what he believes. Well I `ll leave it alone now,enough has been said.
Charles,
Hello Dentdog,
I hope you soon find an answer to your system hum issue. I use the same BPT unit and it's terrific! I have no hum problems with its use un my system.
Dentdog,
You were certainly given very solid feedback from Tom32. I believe you'll get this problem solved.
Any component that preserves the full tone,harmonics, body, scale and dynamics that are so obvious with live music is closer to the truth.Most listeners 'long term' won`t be happy with a device that`s incapable of maitaining this vital signal information. How the attributes of fuller tone,saturation and dynamic vibrancy can be a "coloration" when their presence is so very obvious with live performances? It would seem the passive(or active in some cases) component is subtractive of the complete audio signal if it doesn`t maintain these mandatory and honest aspects of the music, this is why music has emotional power and involves us.If these nautral and intrinsic features of live music are not lost or diluted then the component is doing its job,be it active or passive.
Regards,
George it`s interesting how you dismiss the results of others who don`t agree with you. Grannyring and others on this site have put their money where their mouth is and actually purchased your component.Most of them thought highly of it but ultimately found short comings when directly compared to an active linestage in their systems.

Rather than graciously acknowledge their honest opinions, you claim they just prefer the added colorations they hear.A bit defensive and disingenuous don`t you think? Why can`t you admit they have discovered a few sonic flaws with your component when it was out performed by another component? there`s no shame in that, nothing is perfect,and some will prefer your device(it goes both ways,subjectivity).Do you believe you have superior hearing or that the others don`t know what live performing musicians truly sound like? Are they all wrong and you`re right? true to the source(as you claim) is a pale alternative to those components that reach deeper and further and provide the closer to real live music criteria/sound.Why would someone settle for less,tone,body,dynamics and vibrant timbre/harmonics(what Grannyring and others found lacking with the Lightspeed) in the name of "true to the source" which is less convincing in direct comparisions.Humility is a virtue.