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Audio Research or Conrad Johnson Tube Pre-Amp???

I am looking at the purchase of an Audio Research SP-9 or SP-14 or Conrad Johnson PV-9a, PV-10, PV-11 or PV-12 pre-amplifier. It's very difficult since I've not been able to hear every one of these pre-amps. However, I do want a tube pre-amp to mate with my Threshold S/300 and Mirage
OM-9 speakers. Later I plan to purchase Magnapan 1.6 speakers. I will also be using an Elite Rock Turntable with Excalibur tone arm. I will also be using two professional tape decks for recording and playback.

I really need assistance regarding the following:

1. Which pre-amp will work well.
2. I also need to know which tubes are the best for a particular pre-amp?
3. how long do tubes last normally with 2 hours daily use?

Any other information you can offer would be greatly appreciated. Thanks so much all.
4. Does turning on and off the tube pre-amp hurt it?
rbwinterlink
stanwal's avatar
stanwal
3,147 posts
 
I suppose downunder refers to the location of your head so you should know bullshit when you see it.
downunder
1,329 posts
 
Stanwal - you are a funny guy - not

why don't you keep your mouth shut and give your opinion when you have actually heard something you are dribbling on about, rather than relying on reviewer numbering systems.

Martin Colloms is a professional hifi writer and almost every new piece of cj or ARC equipment is so much better than the previous piece. or so you have to believe, otherwise he will be out of a gig
stanwal's avatar
stanwal
3,147 posts
 
Downunder, when I want your opinion I will beat it out of you. Martin Colloms has been one of the most respected Audio writers for over thirty years while you are just some shithead.
onemug
784 posts
 
Rbwinterlink,

1. Either will work well. You can't have someone else tell you what you will like best.

2. The 6922s are a fantastic tube to roll. You may want to go with a brand that is more sweet or more neutral. We have no way of knowing what you will want.

3. At 2 hrs a day, probably 5 to 10 yrs.

4. No, but don't turn it on and off several times a day. On when you want it on and off when you are done for the day. Someone will tell you to leave in on 24/7. Try it and see if does vs how it sounds after being on for 1 hr. Doing the math, 2 hrs a day = 730 hrs a yr. 24/7 = 8760 hrs a yr. Tubes don't last forever.

Other info: I don't think you can go wrong with either brand. Just get the nicest one you can and live with it.
Some day in the future you will get a chance to demo the other brand and if you like it better, make the change.

For the record, I own the CJ ART series 2 and the ACT 2 series 2, different, but love them both. I was surprised at Colloms ratings of the CJ's. He clearly favors the 6h30 sound over the 6922, rating the CT-5 way above the ART. That's his opinion, value it or not.

Keep in mind, when you ask what is the best "whatever", you're asking for opinions and you will end up with a poll. If 90% felt "a" was better than "b", that would be pretty convincing but you might be in the 10% group that prefer "b". Your system fits "your" ears/taste.
downunder
1,329 posts
 
Onemug

Are you going to upgrade the ART to series 3, or happy where you are at now?. me I am debating as the upgrade is a considerable sum and don't want to loose the magic.

I believe the ACT2 series 2 is a lot better than the original. Even Lew from cj told me they had made a mistake with the original ACT2 in it being too lean, hence the series2 so quickly after the original.

yes Collums review of the ACT2/CT5 being so far ahead of the ART certainly was puzzling. that is why, if possible always try to listen to a piece before comitting. replying on lists is very dangerous.

cheers
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