Is 40 watts per channel enough?

Hello everyone,

I am wondering if I should be concerned that the Simaudio moon 220i has 40w per channel. (class A/B integrated amplifier) I can purchase it for 600 CAD.
If it is a concern, I can purchase a Peachtree Nova 150 with 150w per channel. (Class D integrated amplifier) This one is also for 600 CAD.
Another option that would save me money is the Cambridge CXA60 that has 80w per channel. (Class A/B integrated amplifier) This one would be 450CAD.

I am going to listen to a Moon 250i tomorrow with my speakers, and if I like it I would like to purchase the 220i, but I will wait to see what you guys think about the low 40 watts per channel.

I will not be able to demo any of the amps that I am purchasing, the 250i is the closest local similar amp I could find that a friend of mine is willing to let me try. I have never heard anything from Peachtree so I do not know what to expect, I am also upgrading from a Kenwood M1 and C1, and a Cambridge Topaz SR10, both of these sound similar to me and I currently use the Topaz SR10 as I am trying to sell the Kenwood stack.
 
For 4 ohm rated speakers, one thing to look at is whether the amplifier power doubles into 4 ohms compared to 8 ohms.
This indicates a good design for 4 ohms.
I will look into that, but I believe it does double, thanks. These amps are the most expensive I will have ever purchased, and the newest too. I used to buy cheaper vintage gear. If it were up to you, would you recommend any of the three on my budget?
 
Can the used amps be returned if you don't want them?
No I don't believe so, I am buying on Canuck or Marketplace. I do not intend to return as any of these will sound good compared to what I currently have. I am buying from sellers with good reviews
That's really rolling the dice. What if the amp in question doesn't sound good, despite all the glowing reviews?

jeff
It's a risk I have to take I guess, it will still sound better then my current equipment I am sure. I just want to make sure I get the best of the three options. The Simaudio 250i which is very similar to the 220i is the only one I can demo.
 
I am wondering if I should be concerned that the Simaudio moon 220i has 40w per channel. I am also upgrading from a Kenwood M1 and C1, and a Cambridge Topaz SR10, both of these sound similar to me and I currently use the Topaz SR10 as I am trying to sell the Kenwood stack.
What don't you like about the Topaz SR10 and Kenwood M1?
These are 85w/ch and 105w/ch which is 3dB+ more than the 220i, if you use most of the power you have on tap now then 40w/ch will not be sufficient.
 
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The Moon does double power into 4 ohms, so that's good. But I can't tell you which of these would work best on your speakers.
Often people buy equipment to resell it, so they may not know that much about it, even if they have good ratings as a seller.
 
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What don't you like about the Topaz and Kenwood?
These are 85w/ch and 105w/ch which is 3dB+ more than the 220i, if you use most of the power you have on tap now then 40w/ch will not be sufficient.
On the Kenwood I have never gone to max power, on the Topaz I believe I got close. I will check tonight quick. I don't necessarily dislike them, but I would enjoy more detail and instrument separation, I have been hunting for speakers without boomy bass and people eventually told me I just had bad amps. I have B&W CDM1 SE's too but can't listen to them because I get fatique from it and the Yara's are the same honestly. I have Totem mites as well and they r the only ones that don't give me listening fatigue. I was told to try a better amp before looking for more speakers.