johnsonwu

Responses from johnsonwu

Review: Counterpoint SA-1000 Tube preamp
I sold my SA5000 (tried both with and without follower jumpers) even before the Plitron mod and the final regulator mod to this monster PAS3.The 2 preamps were compared at 3 different places (mine and 2 friends') and there is no comparison. The SA... 
Cary SLP-98 v. Manley Shrimp
The SLP98 I owned briefly did not even sound remotely as good as a stock Ming Da MC-2A3. The Cary has a very artificial mid high which works well for certain kinds of music. Bass is worse than the Ming Da despite my attempts to change out the caps... 
Review: Ming Da MC-2A3 Tube preamp
4 things that made the most difference with my unit are:1. output caps: replace them with Mundorf Silver oil, greatly increased transparency.2. minor mod to the circuit to follow the schematic. Cleans up the sound a lot. Funny midrange harmonic an... 
6SN7 based Pre-Amplifier
Found 2 major design flaws of the Ming Da:1. Filament power supply in series, 2 supplies, one shared between 2 6SN7 and the other among 3 6922, non regulated.Be prepared for it to sound good one day and bad on another.2. Grid resistor from 6SN7 st... 
6SN7 based Pre-Amplifier
Tried the stubby Syl chrome top in the regulator and RCA smoke for the input/gain stage 6SN7s. Sounds OK but top end is colored (there's a frequency in the mid high thats recessed and a little above that its pronounced).I think tube-rolling among ... 
6SN7 based Pre-Amplifier
Regarding the Ming Da MC-2A3.Am already using RCA2A3 for rectifiers, GE british EL34 for regulators,and swapping from among my RCA smoke glass, CBS, stubby Sylvania chrome tops, and KenRads.Each combo yields a different flavor (color) and I am hav... 
6SN7 based Pre-Amplifier
The Consonance sure looks enticing, the tube config also looks right.(Love them 6SN7s)The concern is whether Consonance can build a 6SN7 preampthats quiet and not bloom-and-gloom bloated.It would be great if the inside is point to point wiring(pot... 
Best Preamp for under $1750.00
Where can you find a Consonance Cyber 222 Mk II for $1500?Does anyone know how the 6SN7s are wired (SRPP? parallel?)Thanks.Got a Ming Da MC2A3 myself and it seems to be a pretty good deal.Bass is a bit loose though. 
6SN7 based Pre-Amplifier
I wrote a mini-review on the CA906 and submitted it to www.high-endaudio.com. Just bit the bullet on a Ming Da MC-2A3.Not nearly the same class as the CA906 in terms of build(I have NEVER seen layout and soldering as good as Canary products), qual... 
6SN7 based Pre-Amplifier
I had the opportunity to listen to a Canary CA906 (2 6sn7s per channel with extensive tube rectification and regulation) in my system with both the VAC Phis and NP220s.This is probably the best production preamp I have every heard.Details later. 
6SN7 based Pre-Amplifier
there seems to be a 6sn7 variant of the aikido I think is worth looking into. 
6SN7 based Pre-Amplifier
Polk432 are you hinting that the MC-2A3 is a fraudulent listing? Or are you referring to an SLP98P? Seller of the formet seems to be some shipping liquidator. 
Avalon Eidolon and Krell, good match or not?
I do believe Audiofeil has listened to more setups than Mr. Dave_b. Rather than just a hobbyist, Audiofeil is a pro and has been in the business for years.Since live sound is impossible to recreate fully at home,I would opt for the more enjoyable ... 
Avalon Eidolon and Krell, good match or not?
Interestingly I almost wrote the same response Dave_b posted, I have been a regular attendee of th concerts @ Davis in SF and Herbst theater for many years.I have experience seating @ different sections but the sound that I heard in those events i... 
6SN7 based Pre-Amplifier
The Aria basic WV11 is still $6350.Not anyone can afford it.Since the thread starter is interested in 6SN7I could only recommend Melody 1688 Signatureor TubeCAD.com DIY boards for the Aikido 6Sn7 balanaced design) , or get Scott Frankland (local i...