Conrad Johnson Owners.com

You might just want to call CJ directly on this. They definitely pick up the phone and are as nice as can be in answering technical questions such as yours. At least, that's been my experience. This isn't a direct reply to your question, but my ET250 came with Electroharmonix 6922 tubes (same as the...

Glad the CA150 is back and you are enjoying it. At the end of the day, that is the most important thing. I have to agree that it must have been annoying to lose the unit for weeks only to find out that an upgrade would not be possible. I guess it will always be a difficulty with soarcing unique com...

CJ is much better to deal with than companies importing from China, or owned by absentees. Oh yes, I know them well, as they are local. (I live in DC) Great people in every way. I've owned CJ equipment for 35 years, and whenever I've had a repair, which is almost never, I just bring it to their fac...

Didn't they give an estimate before you shipped it? I wouldn't worry about the SE upgrade. As I mentioned, I auditioned the MF2550 against a well-broken in 2550SE, and while the SE was more detailed, I thought it was a less "musical." I did think the Classic SE pre-amp was a significant im...

The volume control level seems to require a high setting. 😉 I consider that a plus...about the only thing I don't like about my Classic SE and PV7 preamps is that volume the control too sensitive on the line stage. I can only go to about 8 o'clock (about 1/8 of the entire range) before it gets too ...

Presently I am running all Groneberg Quattro Reference cables which cost around 350.00 per meter pair. I am interested in specifically a cable to go from the MF2550 to the Rogue RP-5 tube preamp. I don't care for the blue Jeans or signal cable, wondering about the Audioquest or other mainstream cab...

I use the Kimber KS silvers that sell for about US$1400 -- KS 1121? ( non balanced). I imagine the Nordosts would be very good too. My Kimbers really give the MF2550 room to romp. I really like them.

I have the MF2550 non-Teflon, and I also auditioned the DNA 250 for several weeks. It's interesting...even though the MF2550 seems to be based on the DNA250 design, it's a true CJ -- which the DNA250, despite being built by CJ with a lot of CJ parts, just wasn't. The area where they are similar is t...

you should have bought the MF-2550 - it's a CJ reworked McCormack DNA 250, with the same distributed architecture, but much better components, and reworked circuit topology. Really? How is it that you KNOW that, that you state it as if it's FACT? I was sort of kidding about you should have bought i...

you should have bought the MF-2550 - it's a CJ reworked McCormack DNA 250, with the same distributed architecture, but much better components, and reworked circuit topology.

On mine, the bottom doesn't come off. Just the top. I wouldn't worry about whatever it was at this point.

What do you mean "there's no bottom on the amp"?

I have the Classic SE and agree it's a great preamp, I waited almost 2 years/2000 hours to replace the tubes, and that was too long -- the immediate improvement was a little too noticeable, meaning it was sub-optimal for a while, even though I didn't really notice. I think 18 months /1500 hours is a...

wouldn't that void the warranty? In any event, I think it's one of the coolest looking amps ever. Love the Wrigley Field cutout for the tubes. Teflon Hell awaits for 400 hours. Definitely will not be harsh on anything after break-in. My issue with it was almost the opposite -- too "smooth."...

FWIW, I found the ET-250S rather too laid back -- it never really made my Harbeth 30s come alive, We then auditioned it on a set of Sonus Faber stand speakers, same result. I went with the non SE MF2550, which is $4000 and am very happy. It has pulse, pace, and drive which I never got from the ET-25...

... If they do come out with an SE/Teflon caps version, I'm sure it'd sound superb (not that the current version is a slouch, I'm sure). Unfortunately there's no room in the CA200 for the larger Teflon caps. Based on my experience with the Classic SE preamp and the MF2550 power amp, Teflon caps mak...