Amp recommendations for Joseph Audio Perspectives2
CJ says 200wpc, 135 lbs, 1b is the latest version https://conradjohnson.com/vintage-conrad-johnson-products/ but owners manual says 150 wpc https://conradjohnson.com/owners-manuals/prem1bman.pdf in any case, more than enough power for those speakers, and more for future speakers personally, I would go with the McIntosh, 75 wpc also enough for those speakers |
McIntosh, 75 wpc https://www.ebay.com/itm/McIntosh-MC275-Stereo-Tube-Power-Amplifier-MINT-CONDITION-Play-Beautifully/274449453984?hash=item3fe67653a0:g:z-YAAOSwN41fKa16 CJ, says 160wpc (verify wpc), recent overhaul https://www.ebay.com/itm/Conrad-Johnson-Premier-1b-tube-amplifier/303247243931?hash=item469af1ba9b:g:mqYAAOSwokxdSzPT |
I have not heard those specific models. In addition to performance, I buy things I like/love every time I see/touch them, power on or off. That puts my brain in a more receptive state for their superior performance. That Vintage MC275 is a beauty, I much prefer it to the CJ. I would not want that beauty down out of sight if I could arrange it. I tore my Meniscus pulling my McIntosh SS Amp, MC2250 80 lbs, out of a low shelf, a pair of compact mono's have an ease of movement advantage. Location: think about how two people could put heavy piece in place together. |
Is 75 wpc enough for those speakers? I agree, talk to Jeff. I had the Infinite Slope Crossover, I don’t understand how it would make any difference to placement. They were the most measurably accurate speakers I’ve ever owned, enjoyed them for many years, driven by 300wpc SS (they didn't need that much, it was a phase I went thru, 35 wpc tubes drove them well also) I missed and now prefer my horns and 15" woofers, and back to tubes, JSE’s at my son’s house. They were heavy, came on wheels, rolled forward and away from the corners, toed in. I have my preferred location(s). I often talk about how a very small adjustment to balance can make a surprising difference. Last night, playing Norah Jones, 2lp set, 2nd lp recorded live, after a while, I adjusted my toe in outwards some, it made a very nice difference. Last week, imaging was un-naturally weide, I toed them in some, bingo. I’m a big fan of heavy speakers on wheels, pushed back when space needed for large family gatherings; pulled out the pre-determinned distance from rear and side walls for listening, and situational toe-in. I use 3 wheels, (two front and 1 rear) so the weight per wheel is increased, and no wobble/vibration issues anywhere I move them. They can tip during movement, so I put two blocks on the back corners, just above the floor surface normally, but if they start to tip, the block stops any tilting movement. Not as important with my current monsters, more important with the taller JSI Infinite Slope Model 2’s, they came with 4 wheels, I changed to 3 and rear corner blocks. |
these speakers around 80 lbs each. IMO they are heavy enough for stability on wheels. lift one of these 80 lb bags of concrete mix at home depot, https://www.homedepot.com/p/Quikrete-80-lb-Concrete-Mix-110180/100318511 ....................................3 wheels for speakers. no wobble and more weight/wheel than 4. 80lb speaker: 26 lbs/3 wheels rather than 20 lbs/4 wheels anti-tilt rear corner blocks (slightly shorter than the wheel height) do not touch floor when stationary, but contact floor if speaker starts to tilt during movement. softer wheels for hard floors; harder wheels for carpet 2 front corner wheels, stable left to right 1 rear center wheel, unstable in rear when moving 2 anti-tilt corner blocks in rear ....................................... quickie finds, just to illustrate ideas wood finish, 14 x 14 simply relocate a rear wheel and add two rear anti-tilt corner blocks https://www.wayfair.com/outdoor/pdp/innova-hearth-and-home-square-caddy-innv1246.html perhaps try these, see if you actually benefit from adjusting toe-in. If not, remove them. listen on spikes; listen on 3 wheels, any difference? I seriously doubt it. ......................................... furniture dolly, 11.5 x 22.5 cut to size, make finished wood cover to conceal it https://www.homedepot.com/p/Stalwart-440-lbs-Wheeled-Furniture-Dolly-M550109/302662176 cut to size, reattach wheels, add two anti-tip blocks, then have local woodworker make a cover that simply drops over it, finished wood, laminate, paint, .... .......................................... IF, after preferred placement is found, only adjusting toe-in, never pushing them rearwards, you might think about leaving the factory spikes, put them on a properly sized base plate that can be rotated. .................................... btw, 4 wheels can certainly work, you get a bit less weight per wheel, might not matter, and you simply need to solve any wobble that might occur, not hard, but I have bad back and knees, so I go for 3 wheels. You want the drivers to move, not the speaker, so 3 wheels is definitely preferred. |
