georgehifi
Responses from georgehifi
| Best preamp 2k or under, new or used Backgroundblur: Your JKDAC32 dac gives out 2.1v at less than 100ohms output impedance.Your McCormack Power Drive DNA-1 power amplifier has 1.2v input sensitivity to make it give out it's full output of 150w into 8ohm, this combined with 100kohm it... | |
| Preamp Noise with High-Efficiency Speakers Ok you tried to give all 4 preamps a earth with no joy, but you have not said if the mains lead on them is earthed?, if so disconect it, if this still is not a fix, "luckily you can still enjoy music running source-direct." which in your case is a... | |
| Preamp Noise with High-Efficiency Speakers Ground loops are most likely to present 50/60hz "LF Hum", a BUZZ as the OP says he has indicates higher frequency content, this could be rectifier noise, but from 4 separate preamps tube and SS this is not likely. If the "buzz" raises and lowers w... | |
| Preamp Noise with High-Efficiency Speakers Yes you are right Al, my bad, I was including the phono, but up to 20db for the line level is not unheard of.eg: The CAT line stage: 15.0dB of gain set to Low and 25.8dB set to High.Balanced Audio Technology line preamplifier gain was slightly hig... | |
| Preamp Noise with High-Efficiency Speakers Worth a try if it doesn't cost him even more money and time to rid the noise. I believe he maybe just hearing the noise from too much amplification with 104db speakers and when he OMITS the active pre (and he has tried 4 different ones solid state... | |
| Preamp Noise with High-Efficiency Speakers He has way too much system gain, and with speakers that are 104db! He shouldn't have to use an isolation transformer if that would work at all with the problem he has.Cheers George | |
| Preamp Noise with High-Efficiency Speakers He has tried all that and more.Quote from the OP: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 X... | |
| Preamp Noise with High-Efficiency Speakers My whole argument is for the OP to go direct with his DP777 dac and use the inbuilt passive in it. And yes if you want to drive 30ft of interconnect an active is the way to go. My comments on voodoo are just that some believe that an active preamp... | |
| Preamp Noise with High-Efficiency Speakers Charles1dad Quote:"Anything inserted into an audio system signal path will make its presence known."That's right, one of the best open/transparent sounds lately I have heard was from a old Musical Fidelity A3/24 dac that has such a beefy output st... | |
| Preamp Noise with High-Efficiency Speakers Like I keep saying. "By all means you can change the sound to your liking with a active preamp of your choice, this is why ALL ACTIVE PREAMPS SOUND DIFFERENT, as they are not a strait wire with gain"But if you want to hear the source as it is, go ... | |
| Preamp Noise with High-Efficiency Speakers Not apologizing to you at all, just correcting your misinterpritation of Nelson Pass's statement, as you also did with my post.Cheers George | |
| Preamp Noise with High-Efficiency Speakers Also just to let you know that Nelson Pass originally designed the B1 buffer back in May 2008 http://www.diyaudio.com/forums/analog-line-level/80194-lightspeed-attenuator-new-passive-preamp-137.html#post1521766 to be on the output of the Lightspee... | |
| Preamp Noise with High-Efficiency Speakers Sorry Roscoeiii, you need to read Nelson Pass's quote more carefully. "just an input selector and a volume control.Hardly any noise or distortion added by these simple passive parts" His B1 buffer is active"no worrying about what type of capacitor... | |
| Preamp Noise with High-Efficiency Speakers YingtonggaoI am not sure the DP-777's output impedance (at more than 100 Ohm) and the FL-100's input impedance (57k Ohm) is a match made in heaven.Yingtonggao100ohms into 57kohmsThis is a great/perfect match end of story, especially that you have ... | |
| Preamp Noise with High-Efficiency Speakers It is a banaid fix because his AMR has to drive the input of a preamp through the same interconnects and pre amp inputs are usually 47kohm (industrie standard), his FL100 is acually higher and easier to drive at 57kohm through the same interconnec... |