Please don't take offense as you did last time, but this needs to be corrected.
The specification for sensativity for the 60XTi is given as voltage sensativity. 94dB SPL out for 2.83V in (at a meter distance.) When voltage sensativity is specified then power input doesn't not enter into the basic calculation for SPL output. Only voltage is required. Power does enter how much power the power amplifier will have to deliver to the speakers, but this is a different question.
If the voltage sensativity specification is 94dB SPL out for 2.83V in, then the speakers is rated to deliver 94dB SPL out for 2.83V in. The impedance of the speaker is irrelevant in the output calculation. Here is some help with this.
In simple terms, Power = V^2/R
In this case: Power = 2.83^2/8 = 8/8 = 1W, this means that 2.83V into 8 ohm =1W.
You need to understand the difference between power sensativity, which is dB SPL out for 1W in, and voltage sensativity, which is dB SPL out for 2.83V in.
Your statement should read: "94 dB/2.83V/1m would be comparable to 94 dB/W/1m for 8 Ohm speakers."
If you want to consider power, then for 4 ohm speakers the power sensativity using the values from above would be, 91dB SPL/W/1m for a 4 ohm speaker.
Similarly for 2 ohm speakers the output would be, 88dB SPL/W/1m for 2 ohm speakers.
Also note that Ohm was a person, ohm is the unit.
I did not take offense last time, just didn't appreciate your jumping on my typo (sort of) and made a big deal out of it, using derogatory remarks like "nonsense" (iirc). Regardless, I do respect and appreciate knowledgeable people such as yourself on this forum.
Yes, I understand everything you wrote in your post, simple power formula and Ohms law that anyone with the most basic knowledge in electrical principles, let alone EEs should know and understand!! I posted my own Excel based calculator before, it can accept inputs in either dB/2.83V/m or dB/W/m, and any impedance values. In fact, I would have explained the difference between the two, and how to adapt the numbers in the case of speakers with impedance other than 8 ohms and sensitivity specs in dB/2.83V/m for use with some of the online calculators that are based on 8 ohm impedance and sensitivity specs in dB/W/m for the sensitivity entry. I did not do so as Snakeoil did not ask for such, so I simply made my point the way I did, knowing that we are dealing with a 4 ohm speaker.
Before I posted, I checked the specs of the Motion 60 XTi so I knew its 4 ohm rated already. When I wrote 94 dB/2.83V/1m would be comparable to 91 dB/1W/8 Ohm speakers, I allowed for the fact that for 4 ohm impedance, 94 dB/2.83 V would be equivalent to 94 dB/
2W, or 91 dB/1W, as simple as that. To me there is nothing to be corrected because it was not meant to be a general statement, but one specifically related to the 4 ohm Motion 60 XTi speakers. If you insist that it must be "corrected", no problem, but perhaps try "need clarification" or just ask questions such as, did you drop 3 dB to allow for the 2.83V/1m vs 1W/1m, when the impedance is 4 ohm? I guess that's not your style, that you seem to enjoy lecturing even when not asked for. I always thought you are probably an electronic designer of some sort but now I am beginning to think you may actually be a lecturer, or both. I also did teach EE very briefly in the early part of my career, got out early and have been a practicing licensed EE for many years so I guess I am a little thin skinned when being called out in a harsh way or even derogatory (not in this case) for obvious typos or omitting details that should have been included.
Also note that Ohm was a person, ohm is the unit.
Now that sounds a little ridiculous!!
Ohm | unit of energy measurement | Britannica
You assume that I don’t know Ohm is the name of a person? This is an audio forum, not all are perfectionists. Oh, I could, but I am not going to ask you to do a spell check before posting just because I noticed something.
I think we should try and avoid taking things out of context and not to be too presumptuous. In this case, I still don't take offense, in fact what you have done (without being asked for) does help clarify my points and so others hopefully wouldn't take it on face value (like you seem to have done) and misunderstood what I was trying to explain. So thank you for that..