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Maty what did you do to finally fix your issue with dc offset on your ac mains? I thought your quad serial connected atl hifi dc blocker fixed it?
Some weeks ago the very old cables (fabric covered) of the electric company to the building burned -> a phase joined the neutral -> 400 volts!In the DC Blocker prototype one of the two fuses burned and the varistor too.[updated: added photo]The sound after it was much better. Those cables had to add a lot of high frequency noise!Now I have the DCB with the DCBx4 and the sound is very good. The music, the FM radio, has never sounded so good ... There are more details, the bass is more blunt, there is more energy in the music![IMG] http://maty.galeon.com/WP-imagenes/hum/AV-Marantz-SR4500-KEF-Q100-ATL-Hi-Fi-DCB-prototype-DC-Ripple-Blocker-x4-ME.jpgI have written it many times: (ALL types) noise is our enemy.In short, I am VERY HAPPY. Now I feel that I can forget to buy a better amplifier and it was a magnificent decision to spent the money to clean the noise and interference.PS: in his day I tried DCBx2 + DCBx4 and the sound was worse, there was loss of dynamics.
By the way, before all Würth 150 kHz ferrites, Schaffner RF/EMI filters, DC & Riple Blockers, sheet steel… the LPF was 15000, 16000… 19800 and now 22050 Hz. With 38000 Hz sounds good too, without fatiguing.KEF Q100: -3 dB 49 Hz – 40 kHz[IMG] http://maty.galeon.com/WP-imagenes/kef-q100/KEF-Q100-iZotope-RX-5-De-Hum-22050.pngCuriosity, the same VST plugin allows two different maximums:* With foobar2000 the top is 22050 Hz* With JRiver the top is 48000 Hz
And more important too: the sound is more SPATIAL or 3D.Now sounds Jennifer Warnes – The Hunter (1992) (Vinyl, US Remaster 2011)It sounded great but now it fills the room.The improvement in bass is such that it is as if I had added a subwoofer! Every time I love more my cheap tweaked KEF Q100 coaxial speakers. They have never been the bottleneck of my system.Well, that, I’m very happyyyyyyyyyyyyyyyyyyyyyyyyyy
I let the amplifier work for over a week and a half and listened to lots of music. I wanted to be sure of what I heard. I will also validate with Fab, but so far I “hood” on the sound of my USSA 5!The power supply in an amp makes all the difference, a huge difference in fact. That’s why you should never be afraid to invest in it. The double bridges of ultra-fast diodes with “soft-recovery”, the Mundorf M-Lytics MLGO condos with low impedance and ripple very high and the layout of the PSU very well done, high quality processors. All that matters a lot. This makes a power supply with lower impedance and a much lower noise in the end.Result, full of low-level micro-details that were difficult to hear or went unnoticed, improved dynamics, a super silent background (very black) and micro-details that are no longer hidden or washed (washed). It was excellent before but there, as I told Fab, I almost fell off my chair. On some recordings that had a remarkable stage depth, it’s even better, difficult to explain, must be heard. I can stick my ear directly on the tweeter and not even a slight whistling, nothing, enough that sometimes I do not know if the amp is open or closed (I have no switch illuminated forward)!In short, I am very impressed to hear that with a high quality PSU, the USSA 5 sounds even better. Proof that the PSU is the "bottleneck". ]
J’ai acheté 8 condos Mundorf M-Lytics MLGO 33000uF 40Vdc pour mettre dans mes deux nouveaux PSU pour le USSA 3/5. Un ESR de 6mOhm et Ripple de 11.2A
I just want to thank you all, because I was in a big trouble with my studio monitors (Focal CMS65), whose internal toroidal transformers made lot of noise, making them excellent monitors for mixing or listening, but just annoying when idle …I’ve used schematic posted by byteboy in post#15:My monitors transformers are now perfectly silent.
I used 3300uF caps. I will try with bigger ones if i find it in my stock (but with theses values, it sounds good)
DR18 -0.12 dB -22.99 dB 7:21 02-A2 Rodeo - Buckaroo Holiday
foobar2000 1.3.17 / Dynamic Range Meter 1.1.1log date: 2017-11-30 20:28:10--------------------------------------------------------------------------------Analyzed: Lane, Atlanta SO / Copland - Appalachian Spring. Rodeo. Fanfare For The Common Man--------------------------------------------------------------------------------DR Peak RMS Duration Track--------------------------------------------------------------------------------DR16 -0.47 dB -21.79 dB 3:20 01-A1 Fanfare For The Common ManDR18 -0.12 dB -22.99 dB 7:21 02-A2 Rodeo - Buckaroo HolidayDR14 -14.74 dB -34.88 dB 3:44 03-A3 Rodeo - Corral NocturneDR14 -9.90 dB -30.57 dB 4:05 04-A4 Rodeo - Saturday Night WaltzDR16 -0.89 dB -23.20 dB 3:21 05-A5 Rodeo - Hoe-DownDR17 -0.39 dB -23.85 dB 22:24 06-B1 Appalachian Spring (Suite)--------------------------------------------------------------------------------Number of tracks: 6Official DR value: DR16Samplerate: 96000 HzChannels: 2Bits per sample: 24Bitrate: 2578 kbpsCodec: FLAC===========================================================
foobar2000 1.3.17 / Dynamic Range Meter 1.1.1log date: 2017-12-06 11:56:05--------------------------------------------------------------------------------Analyzed: Reiner, The Chicago SO / Lieutenant Kije / Song Of The Nightingale--------------------------------------------------------------------------------DR Peak RMS Duration Track--------------------------------------------------------------------------------DR14 -0.50 dB -23.09 dB 4:16 01-Lieutenant Kije, Op. 60 (The Birth Of Kije)DR15 -6.63 dB -30.53 dB 4:29 02-Lieutenant Kije, Op. 60 (Romance)DR14 -1.18 dB -21.76 dB 2:50 03-Lieutenant Kije, Op. 60 (The Wedding Of Kije)DR12 -2.00 dB -19.49 dB 2:41 04-Lieutenant Kije, Op. 60 (Troika)DR13 -9.95 dB -30.05 dB 6:09 05-Lieutenant Kije, Op. 60 (The Burial Of Kije)DR13 -2.47 dB -23.36 dB 10:31 06-Song Of The Nightingale (Symphonic Poem) (Part 1)DR17 -2.40 dB -27.37 dB 12:00 07-Song Of The Nightingale (Symphonic Poem) (Concluded)--------------------------------------------------------------------------------Number of tracks: 7Official DR value: DR14Samplerate: 96000 HzChannels: 2Bits per sample: 24Bitrate: 2486 kbpsCodec: FLAC===========================================================
Contents Introduction 1.0 'Dirty' Electricity 1.1 Distortion 1.2 Impedance & Regulation 1.3 Noise 1.3.1 Ferrites 1.4 Frequency 2.0 Voltage Stabilisers 3.0 Isolating/ Balancing Transformers Conclusion
